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Miller, G. W. (2000). Effect of crown growing space on the development of young hardwood crop trees. Northern Journal of Applied Forestry. March 17(1): 25-35. {a} Forestry Sciences Laboratory, USDA Forest Service, 180 Canfield Street, Morgantown, WV, 26505, USA

Naumburg, E. and D. S. Ellsworth (2000). Photosynthetic sunfleck utilization potential of understory saplings growing under elevated CO2 in FACE. Oecologia Berlin. Feb. 122(2): 163-174. {a} School of the Environment, Duke University, Durham, NC, 27708-0328, USA

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Rheinhardt, R., D. Whigham, et al. (2000). Vegetation of headwater wetlands in the inner coastal plain of Virginia and Maryland. Castanea . March 65(1): 21-35. {a} Department of Biology, East Carolina University, Greenville, NC, 27858, USA

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Abrams, M. D. and C. A. Copenheaver (1999). Temporal variation in species recruitment and dendroecology of an old-growth white oak forest in the Virginia Piedmont, USA. Forest Ecology and Management. Dec. 124(2-3): 275-284. {a} School of Forest Resources, Pennsylvania State University, Ferguson Building, University Park, PA, 16802, USA

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Brose, P. and D. V. Lear (1999). Effects of seasonal prescribed fires on residual overstory trees in oak-dominated shelterwood stands. Southern Journal of Applied Forestry. May 23(2): 88-93. {a} Southern Research Station, USDA Forest Service, Clemson, SC, 29634-1003, USA

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Dale, E. E., Jr. and S. Ware (1999). Analysis of oak-hickory-pine forests of Hot Springs National Park in the Ouachita Mountains, Arkansas. Castanea . June 64(2): 163-174. {a} Department of Biology, College of William and Mary, Williamsburg, VA, 23187, USA

Elliott, K. J., J. M. Vose, et al. (1999). Long-term patterns in vegetation-site relationships in a southern Appalachian forest. Journal of the Torrey Botanical Society. Oct. Dec. 126(4): 320-334. {a} Southern Research Station, USDA Forest Service, Coweeta Hydrologic Laboratory, Otto, NC, 28763, USA

Gang, D. R., M. A. Costa, et al. (1999). Regiochemical control of monolignol radical coupling: A new paradigm for lignin and lignan biosynthesis. Chemistry and Biology London. March 6(3): 143-151. {a} Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164-6340, USA

Garten, C. T., Jr., W. M. Post, III, et al. (1999). Forest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains. Biogeochemistry Dordrecht. May 45(2): 115-145. {a} Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6038, USA

Joslin, J. D. and M. H. Wolfe (1999). Disturbances during minirhizotron installation can affect root observation data. Soil Science Society of America Journal 63(1): 218-221. {a} Atmospheric Sciences and Environmental Assessments, Tennessee Valley Authority, 17 Ridgeway Road, Norris, TN, 37828-0920, USA

LaFayette, P. R., K. E. L. Eriksson, et al. (1999). Characterization and heterologous expression of laccase cDNAs from xylem tissues of yellow-poplar (Liriodendron tulipifera). Plant Molecular Biology. May 40(1): 23-35. {a} Warnell School of Forest Resources, University of Georgia, Athens, GA, 30602, USA

Loats, K. V. and J. Rebbeck (1999). Interactive effects of ozone and elevated carbon dioxide on the growth and physiology of black cherry, green ash, and yellow-poplar seedlings. Environmental Pollution 106(2): 237-248. {a} USDA Forest Service, 359 Main Road, Delaware, OH, 4301, USA

Lux, H. B. and J. R. Cumming (1999). Effect of aluminum on the growth and nutrition of tulip-poplar seedlings. Canadian Journal of Forest Research. [print] Dec 29(12): 2003-2007. {a} Department of Biology, West Virginia University, Morgantown, WV, 26506, USA

Mitchell, K. A., P. V. Bolstad, et al. (1999). Interspecific and environmentally induced variation in foliar dark respiration among eighteen southeastern deciduous tree species. Tree Physiology. Nov. 19(13): 861-870. {a} Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue N., Saint Paul, MN, 55108, USA

Moorman, C. E., K. R. Russell, et al. (1999). Snag dynamics and cavity occurrence in the South Carolina Piedmont. Forest Ecology and Management 118(1-3): 37-48. {a} Department of Forest Resources, Clemson University, 261 Lehotsky Hall, Clemson, SC, 29634-1003, USA

Muzika, R. M. and A. M. Liebhold (1999). Changes in radial increment of host and nonhost tree species with gypsy moth defoliation. Canadian Journal of Forest Research. Sept. 29(9): 1365-1373. {a} School of Natural Resources, University of Missouri, Columbia, MO, 65211, USA

Peterson, A. G., J. T. Ball, et al. (1999). Quantifying the response of photosynthesis to changes in leaf nitrogen content and leaf mass per area in plants grown under atmospheric CO2 enrichment. Plant Cell and Environment. Sept. 22(9): 1109-1119. {a} Earth and Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9 W, Palisades, NY, 10964, USA

Stucky, J. M. and R. Coxe (1999). The loss of a unique wetland in the Piedmont, North Carolina. Castanea . Dec. 64(4): 287-298. {a} Botany Department, North Carolina State University, Raleigh, NC, 27695-7612, USA

Swistock, B. R., K. A. Mecum, et al. (1999). Summer temperatures inside ventilated and unventilated brown plastic treeshelters in Pennsylvania. Northern Journal of Applied Forestry 16(1): 7-10. {a} 132 Land and Water Research Bldg., University Park, PA, 16802, USA

Thomas, L. K., Jr. (1999). Changes in tree species dominance on the Rock Creek Park floodplain, District of Columbia. Castanea . Sept. 64(3): 268-271. {a} National Park Service, Baltimore-Washington Parkway, 6565 Greenbelt Road, Greenbelt, MD, 20770, USA

Vose, J. M. and P. V. Bolstad (1999). Challenges to modelling NPP in diverse eastern deciduous forests: Species-level comparisons of foliar respiration responses to temperature and nitrogen. Ecological Modelling. Oct. 122(3): 165-174. {a} Coweeta Hydrologic Laboratory, USDA Forest Service Southern Research Station, 3160 Coweeta Lab Road, Otto, NC, 28763, USA

Warrillow, M. and P. Mou (1999). Ice storm damage to forest tree species in the ridge and valley region of southwestern Virginia. Journal of the Torrey Botanical Society. April June 126(2): 147-158. {a} Department of Forestry, Virginia Polytechnic Institute and State University Blacksburg, Blacksburg, VA, 24061, USA

Wilder, C. M., F. W. Holtzclaw, Jr., et al. (1999). Succession, sapling density and growth in canopy gaps along a topographic gradient in a second growth East Tennessee forest. American Midland Naturalist. Oct. 142(2): 201-212. {a} School of Medicine, Health Sciences Center, University of Virginia, Charlottesville, VA, 22903, USA

Zhang, L., B. P. Oswald, et al. (1999). Relationships between overstory species and community classification of the Sipsey Wilderness, Alabama. Forest Ecology and Management 114(2-3): 377-383. {a} Faculty Forestry, Coll. Environmental Science Forestry, SUNY, Syracuse, NY 13210, USA

Auge, R. M., X. Duan, et al. (1998). Foliar dehydration tolerance of twelve deciduous tree species. Journal of Experimental Botany 49(321): 753-759. {a} Tennessee Agricultural Exp. Station, OHLD, Univ. Tennessee, P.O. Box 1071, Knoxville, TN 37901-1071, USA

Bossart, J. L. (1998). Genetic architecture of host use in a widely distributed, polyphagous butterfly (Lepidoptera: Papilionidae): Adaptive inferences based on comparison of spatio-temporal populations. Biological Journal of the Linnean Society 65(3): 279-300. {a} Dep. Biol., PO Box 7718, Coll. New Jersey, Ewing, NJ 08628-0718, USA

Bratton, S. P. and A. J. Meier (1998). The recent vegetation disturbance history of the Chattooga River Watershed. Castanea 63(3): 372-381. {a} Lindaman Cent., Whitworth Coll., Spokane, WA 99251, USA

Brose, P. H. and L. D. H. Van (1998). Responses of hardwood advance regeneration to seasonal prescribed fires in oak-dominated shelterwood stands. Canadian Journal of Forest Research 28(3): 331-339. {a} Dep. Forest Resour., Coll. Agric. Foresty Life Sci., Clemson Univ., 261 Lehotsky Hall, P.O. Box 341003, Clemson, SC 29634-1003, USA

Busing, R. T. (1998). Structure and dynamics of cove forests in the Great Smoky Mountains. Castanea 63(3): 361-371. {a} Forestry Sci. Lab., 3200 SW Jefferson Way, Corvallis, OR 97331, USA

Cowell, C. M. (1998). Historical change in vegetation and disturbance on the Georgia piedmont. American Midland Naturalist 140(1): 78-89. {a} Dep. Geogr. Geol. Anthropol., Indiana State Univ., Terre Haute, IN 47809, USA

Croker, J. L., W. T. Witte, et al. (1998). Stomatal sensitivity of six temperate, deciduous tree species to non-hydraulic root-to-shoot signalling of partial soil drying. Journal of Experimental Botany 49(321): 761-774. {a} Tennessee Agric. Exp. Station, OHLD, Univ. Tennessee, P.O. Box 1071, Knoxville, TN 37901-1071, USA

Elliott, K. J., L. R. Boring, et al. (1998). Changes in vegetation structure and diversity after grass-to-forest succession in a Southern Appalachian watershed. American Midland Naturalist 140(2): 219-232. {a} U.S. For. Serv., Southern Res. Stn., Coweeta Hydrologic Lab., Otto, NC 28763, USA

Glasser, W. G. and R. S. Wright (1998). Steam-assisted biomass fractionation. II. Fractionation behavior of various biomass resources. Biomass and Bioenergy 14(3): 219-235. Virginia Tech, Blacksburg, VA 24067, USA

Haas, L. and J. M. Scriber (1998). Phylloplane sterilization with bleach does not reduce Btk toxicity for Papilio glaucus larvae (Lepidoptera: Papilionidae). Great Lakes Entomologist 31(1): 49-57. {a} Dep. Entomol., Michigan State Univ., East Lansing, MI 48824-1115, USA

Huber, W. and D. K. Ferguson (1998). On the abrasion of diaspores during fluvial transport: An experimental approach. Review of Palaeobotany and Palynology 102(3-4): 305-311. {a} Palaeontol. Inst., Geocentre, Univ. Vienna, Althanstr. 14, A-1090 Vienna, Austria

Jenkins, M. A. and G. R. Parker (1998). Composition and diversity of woody vegetation in silvicultural openings of southern Indiana forests. Forest Ecology and Management 10(1-3): 57-74. {a} Dep. Forestry Natural Resources, 1159 Building, Purdue University, West Lafayette, IN 47907-1159, USA

Johnson, J. E., J. J. Bollig, et al. (1998). Above-ground biomass and nutrient distribution of released and fertilized yellow-popular trees. Forest Ecology and Management 105(1-3): 231-240. {a} Dep. Forestry, 228 Cheatham Hall, Virginia Tech, Blacksburg, VA 24061-0324, USA

Johnson, J. E., G. W. Miller, et al. (1998). Assessment of residual stand quality and regeneration following shelterwood cutting in central Appalachian hardwoods. Northern Journal of Applied Forestry 15(4): 203-210. {a} Coll. For. Wildl. Resources, 228 Cheatham Hall, Virginia Tech, Blacksburg, VA 24061-0324, USA

Kramer, E. M., R. L. Dorit, et al. (1998). Molecular evolution of genes controlling petal and stamen development: Duplication and divergence within the APETALA3 and PISTILLATA MADS-box gene lineages. Genetics 149(2): 765-783. {a} Dep. Mol. Cell. Dev. Biol., Yale Univ., P.O. Box 208104, New Haven, CT 06520-8104, USA

Loeb, R. E. (1998). Evidence of prehistoric corn (Zea mays) and hickory (Carya spp.) planting in New York City: Vegetation history of Hunter Island, Bronx County, New York. Journal of the Torrey Botanical Society 125(1): 74-86. {a} Nat. Sci. Mathematics, Milwaukee Area Technical Coll., Milwaukee, WI 53233-1443, USA

Martin, J. G., B. D. Kloeppel, et al. (1998). Aboveground biomass and nitrogen allocation of ten deciduous southern Appalachian tree species. Canadian Journal of Forest Research 28(11): 1648-1659. {a} Dep. Forest Resources, Univ. Minn., 115 Green Hall, 1530 North Cleveland Ave., St. Paul, MN 55108, USA

Naidu, S. L. and E. H. Delucia (1998). Physiological and morphological acclimation of shade-grown tree seedlings to late-season canopy gap formation. Plant Ecology 138(1): 27-40. Dep. Plant Biol., Univ. Illinois, 265 Morrill Hall, 505 S. Goodwin Ave., Urbana, IL 61801, USA

Navazio, L., L. Sponga, et al. (1998). The calcium binding protein calreticulin in pollen of Liriodendron tulipifera L. Plant Science Shannon 131(1): 35-42. {a} Dipartimento di Biologia, Universita di Padova, Via U. Bassi 58/B, 35131 Padova, Italy

Sagner, S., W. Eisenreich, et al. (1998). Biosynthesis of 2-C-methyl-D-erythritol in plants by rearrangement of the terpenoid precursor, 1-deoxy-D-xylulose 5-phosphate. Tetrahedron Letters 39(15): 2091-2094. {a} Lehrstuhl Pharm. Biol., Univ. Muenchen, Karlstr. 29, D-80333 Muenchen, Germany

Scherzer, A. J., J. Rebbeck, et al. (1998). Foliar nitrogen dynamics and decomposition of yellow-poplar and eastern white pine during four seasons of exposure to elevated ozone and carbon dioxide. Forest Ecology and Management 10(1-3): 355-366. {a} USDA Forest Service, 359 Main Road, Delaware, OH 43015, USA

Somers, G. L., A. H. Chappelka, et al. (1998). Empirical evidence of growth decline related to visible ozone injury. Forest Ecology and Management 104(1-3): 129-137. {a} Sch. Forestry, 108 M. White-Smith Hall, Auburn Univ., Auburn, AL 36849-5418, USA

Tucker, M. P., J. D. Farmer, et al. (1998). Comparison of yellow poplar pretreatment between NREL digester and Sunds hydrolyzer. Applied Biochemistry and Biotechnology 70-72: 25-35. {a} Natl. Renewable Energy Lab., Golden, CO 80401, USA

Azuma, H., L. B. Thien, et al. (1997). Distribution and differential expression of (E)-4,8-dimethyl-1,3,7-nonatriene in leaf and floral volatiles of Magnolia and Liriodendron taxa. Journal of Chemical Ecology 23(11): 2467-2478. {a} Dep. Botany, Grad. Sch. Sci., Kyoto Univ., Kyoto 606-01, Japan

Azuma, H., M. Toyota, et al. (1997). Chemical divergence in flora scents of Magnolia and allied genera (Magnoliaceae). Plant Species Biology 12(2-3): 69-83. {a} Dep. Botany, Graduate Sch. Sci., Kyoto Univ., Kyoto 606-8502, Japan

Chaffey, N. J., J. R. Barnett, et al. (1997). Visualization of the cytoskeleton within the secondary vascular system of hardwood species. Journal of Microscopy Oxford 187(2): 77-84. {a} Dep. Botany, Plant Sci. Lab., Univ. Reading, Whiteknights, PO Box 221, Reading RG6 6AS, UK

Constable, J. V. H. and W. A. Retzlaff (1997). Simulating the response of mature yellow poplar and loblolly pine trees to shifts in peak ozone periods during the growing season using the TREGRO model. Tree Physiology 17(10): 627-635. {a} Boyce Thompson Inst. Plant Res., Tower Rd., Ithaca, NY 14853-1801, USA

Decker, K. L. M. and R. E. J. Boerner (1997). Ca:Al ratio effects on growth and competitive interactions of northern red oak (Quercus rubra) and yellow-poplar (Liriodendron tulipifera). Journal of the Torrey Botanical Society 124(4): 286-296. {a} Dep. Plant Biol., Ohio State Univ., Columbus, OH 43210, USA

Elliott, K. J., L. R. Boring, et al. (1997). Successional changes in plant species diversity and composition after clearcutting a Southern Appalachian watershed. Forest Ecology and Management 92(1-3): 67-85. {a} USDA For. Serv., SRS, Coweeta Hydrol. Lab., Otto, NC 28763, USA

Han, S. H. and K. J. Lee (1997). Buffering capacity of four tree species against soil acidification by acid rain and variations in nutrient leaching from tree crowns. Journal of Korean Forestry Society 86(3): 342-351. Dep. For. Resources, Seoul Natl. Univ., Suwon, Kyonggido 441-744, Japan

Hanson, P. J., T. A. Tabberer, et al. (1997). Emissions of mercury vapor from tree bark. Atmospheric Environment 31(5): 777-780. {a} Environmental Sciences Div., Oak Ridge National Lab., P.O. Box 2008, Oak Ridge, TN 37831-6422, USA

Hix, D. M. and J. N. Pearcy (1997). Forest ecosystems of the Marietta Unit, Wayne National Forest, southeastern Ohio: Multifactor classification and analysis. Canadian Journal of Forest Research 27(7): 1117-1131. Ohio State Univ., Sch. Natural Resources, 2021 Coffey Road, Columbus, OH 43210-1085, USA

Horn, C. N. (1997). An ecological study of Frasera carolinensis in South Carolina. Castanea 62(3): 185-193. Biology Dep., Newberry Coll., Newberry, SC 29108, USA

Ishihara, Y., H. Kuroda, et al. (1997). Expression system for foreign genes using protoplasts from Liriodendron tulipifera L. suspension culture. Wood Research(84): 12-14. Lab. Gene Expression, Wood Res. Inst., Kyoto Univ., Uji, Kyoto 611, Japan

Iverson, L. R., M. E. Dale, et al. (1997). A GIS-derived integrated moisture index to predict forest composition and productivity of Ohio forests (U.S.A.). Landscape Ecology 12(5): 331-348. USDA For. Serv., Northeast. For. Exp. Stn., 359 Main Rd., Delaware, OH 43015, USA

Johnson, J. E., J. J. Bolling, et al. (1997). Growth response of young yellow-poplar to release and fertilization. Southern Journal of Applied Forestry 21(4): 175-179. Dep. Forestry, Coll. Forestery Wildlife Resources, Virginia Tech, Blacksburg, VA 24061-0324, USA

Orwig, D. A. and M. D. Abrams (1997). Variation in radial growth responses to drought among species, site, and canopy strata. Trees Berlin 11(8): 474-484. {a} Harvard Forest, Harvard Univ., P.O. Box 68, Petersham, MA 01366-0068, USA

Pan, C., S. J. Tajchman, et al. (1997). Dendroclimatological analysis of major forest species of the central Appalachians. Forest Ecology and Management 98(1): 77-87. {a} Dep. Crop Sci., Univ. Ill. Urbana-Champaign, Urbana, IL, USA

Rebbeck, J. and K. V. Loats (1997). Ozone effects on seedling sugar maple (Acer saccharum) and yellow-poplar (Liriodendron tulipifera): Gas exchange. Canadian Journal of Forest Research 27(10): 1595-1605. {a} USDA Forest Service, Northeastern Forest Experiment Station, 359 Main Rd., Delaware, OH 43015, USA

Walters, G. M. and B. C. McCarthy (1997). Forest decline and tree mortality in a southeastern Ohio oak-hickory forest. Ohio Journal of Science 97(1): 5-9. {a} Dep. Environ. Plant Biol., Ohio Univ., Athens, OH 45701-2979, USA

Wullschleger, S. D., R. J. Norby, et al. (1997). Energetic costs of tissue construction in yellow-poplar and white oak trees exposed to long-term CO-2 enrichment. Annals of Botany London 80(3): 289-297. {a} Environ. Sci. Div., Oak Ridge Natl. Lab., Oak Ridge, TN 37831-6422, USA

Ye, J. S. Z. S. B. and Z. R. Wang (1997). Discrimination of leaf anatomic structure of Chinese tulip tree hybrids. Journal of Plant Resources and Environment 6(4): 58-60. Coll. For. Resources Environ., Nanjing For. Univ., Nanjing 210037, China

Adams, M. B. and T. R. Angradi (1996). Decomposition and nutrient dynamics of hardwood leaf litter in the Fernow whole-watershed acidification experiment. Forest Ecology and Management 83(1-2): 61-69. {a} USDA Forest Serv., Timber Watershed Lab., Parsons, WV, USA

Arnold, D. H., G. W. Smalley, et al. (1996). Landtype-forest community relationships: A case study on the Mid-Cumberland Plateau. Environmental Monitoring and Assessment 39(1-3): 339-352. {a} Tennessee Div. Forestry, PO BOx 40627, Nashville, TN 37404, USA

Baldan, B., L. Navazio, et al. (1996). Plant calreticulin is specifically and efficiently phosphorylated by protein kinase CK2. Biochemical and Biophysical Research Communications 221(3): 498-502. {a} Dep. Chim. Biol., Univ. Padova, Via Trieste 75, I-135121 Padua, Italy

Barnett, O. W., V. B. Shelburne, et al. (1996). A new virus disease of yellow-poplar. Plant Disease 80(12): 1317-1319. {a} Dep. Plant Pathol., N.C. State Univ., Raleigh, NC 27695, USA

Carroll, J. F. (1996). Occurrence of larval Ixodes scapularis (Acari: Ixodidae) on tree trunks. Journal of Medical Entomology 33(6): 971-975. Parasite Biol. Epidemiol. Lab., USDA-ARS, Beltsville, MD 20705, USA

Clatterbuck, W. K. (1996). A community classification system for forest evaluation: Development, validation, and extrapolation. Environmental Monitoring and Assessment 39(1-3): 299-321. Agricultural Extension Serv., Univ. Tennessee Inst. Agric., Box 1071, Knoxville, TN 37901-1071, USA

Gilliam, F. S., M. B. Adams, et al. (1996). Ecosystem nutrient responses to chronic nitrogen inputs at Fernow Experimental Forest, West Virginia. Canadian Journal of Forest Research 26(2): 196-205. {a} Department Biological Sciences, Marshall University, Huntington, WV 25755, USA

Groninger, J. W., J. R. Seiler, et al. (1996). Growth and photosynthetic responses of four Virginia piedmont tree species to shade. Tree Physiology 16(9): 773-778. Dep. Forestry, Virginia Polytech. Inst. State Univ., Blacksburg, VA 24061, USA

Hildebrand, E., J. M. Skelly, et al. (1996). Foliar response of ozone-sensitive hardwood tree species form 1991 to 1993 in the Shenandoah National Park, Virginia. Canadian Journal of Forest Research 26(4): 658-669. Dep. Plant Pathology, Environmental Resources Res. Inst., Pennsylvania State Univ., University Park, PA 16802, USA

Hirano, S., S. Kitaura, et al. (1996). Chitin biodegradation and wound healing in tree bark tissues. Journal of Environmental Polymer Degradation 4(4): 261-265. {a} Chitin/Chitosan R and D Room, 445-Sakuradani, Tottori 680, Japan

Norland, E. R. and D. M. Hix (1996). Composition and structure of a chronosequence of young, mixed-species forests in southeastern Ohio, USA. Vegetatio 125(1): 11-30. Sch. Natural Resources, Ohio State Univ., 2021 Coffey Road, Columbus, OH 43210-1085, USA

Paul, M. J. and J. L. Meyer (1996). Fungal biomass of 3 leaf litter species during decay in an Appalachian stream. Journal of the North American Benthological Society 15(4): 421-432. Inst. Ecol., University Georgia, Athens, GA 30602-2202, USA

Rebbeck, J. (1996). Chronic ozone effects on three northeastern hardwood species: Growth and biomass. Canadian Journal of Forest Research 26(10): 1788-1798. USDA Forest Serv., Northeastern Forest Exp. Stn., 359 Main Rd., Delaware, OH 43015, USA

Sewell, M. M., C. R. Parks, et al. (1996). Intraspecific chloroplast DNA variation and biogeography of North American Liriodendron L. (Magnoliaceae). Evolution 50(3): 1147-1154. {a} Inst. Forest Genet., Pacific Southwest Forest Range Exp. Stn., USDA For. Serv., Placerville, CA 95667, USA

Sullivan, N. H., P. V. Bolstad, et al. (1996). Estimates of net photosynthetic parameters for twelve tree species in mature forests of the southern Appalachians. Tree Physiology 16(4): 397-406. {a} Dep. Forestry, Coll. Forestry Wildlife, Virginia Polytechnic Inst. State Univ., Blacksburg, VA 24061, USA

Tworkoski, T. J., M. E. Engle, et al. (1996). Growth regulatory effects and soil concentration of controlled-release trifluralin applied to roots of yellow poplar and red oak. Journal of the American Society for Horticultural Science 121(3): 461-465. {a} U.S. Dep. Agric., Agric. Research Serv., Appalachian Fruit Research Station, Kearneysville, WV 25430, USA

Weyers, H. S. and K. Suberkropp (1996). Fungal and bacterial production during the breakdown of yellow poplar leaves in 2 streams. Journal of the North American Benthological Society 15(4): 408-420. {a} Dep. Biol. Sci., Univ. Alabama, Tuscaloosa, AL 35487, USA

Yabuuchi, H., E. Fujii, et al. (1996). Elongating period and tree form of container-planted tree of Liriodendron tulipifera L. Technical Bulletin of Faculty of Horticulture Chiba University(50): 149-154. {a} Lab. Planting Design, Fac. Horticulture, Chiba Univ., Matsudo City, Chiba, Japan

Zeleznik, J. D. and J. G. Skousen (1996). Survival of three tree species on old reclaimed surface mines in Ohio. Journal of Environmental Quality 25(6): 1429-1435. {a} Div. Plant Soil Sci., W. Va. Univ., Morgantown, WV 26506-6108, USA

Boerner, R. E. J. and J. Rebbeck (1995). Decomposition and nitrogen release from leaves of three hardwood species grown under elevated O-3 and/or CO-2. Plant and Soil 170(1): 147-157. {a} Dep. Plant Biol., Ohio State Univ., 1735 Neil Ave., Columbus, OH 43210, USA

Bossart, J. L. and J. M. Scriber (1995). Maintenance of ecologically significant genetic variation in the tiger swallowtail butterfly through differential selection and gene flow. Evolution 49(6): 1163-1171. {a} Dep. Entomol. Mus. Nat. Sci., Louisiana State Univ., Baton Rouge, LA 70803, USA

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Cannon, W. N., Jr. and B. R. Roberts (1995). Stomatal resistance and the ratio of intercellular to ambient carbon dioxide in container-grown yellow-poplar seedlings exposed to chronic ozone fumigation and water stress. Environmental and Experimental Botany 35(2): 161-165. {a} Northeastern Forest Exp. Stn., Forest Service, U.S. Dep. Agric., Delaware, OH 43015, USA

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Fan, R. W. Z. J. and J. S. Huang (1995). Ultrastructure of pollen wall during germination in Liriodendron. Acta Botanica Yunnanica 17(4): 427-431. Nanjing Forestry University, Nanjing 210037, China

Gilliam, F. S., N. L. Turrill, et al. (1995). Herbaceous-layer and overstory species in clear-cut and mature central Appalachian hardwood forests. Ecological Applications 5(4): 947-955. {a} Dep. Biol. Sci., Marshall Univ., Huntington, WV 25755, USA

Griffith, M. B., S. A. Perry, et al. (1995). Leaf litter processing and exoenzyme production on leaves in streams of different pH. Oecologia Berlin 102(4): 460-466. {a} Natl. Biological Service, West Virginia Cooperative Fish and Wildlife Res. Unit, West Virginia Univ., Morgantown, WV 26506-6125, USA

Hanson, P. J., S. E. Lindberg, et al. (1995). Foliar exchange of mercury vapor: Evidence for a compensation point. Water Air and Soil Pollution 80(1-4): 373-382. Environ. Sci. Div., Oak Ridge Natl. Lab., P.O. Box 2008, Oak Ridge, TN 37831-6034, USA

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Hruska, M. C. and J. E. Ebinger (1995). Monitoring a savanna restoration in east-central Illinois. Transactions of the Illinois State Academy of Science 88(3-4): 109-117. Bot. Dep., East. Ill. Univ., Charleston, IL 61920, USA

Jenkins, C. C. and K. Suberkropp (1995). The influence of water chemistry on the enzymatic degradation of leaves in streams. Freshwater Biology 33(2): 245-253. Dep. Biol. Sci., Univ. Alabama, Tuscaloosa, AL 35487-0344, USA

Johnson, A. S., P. E. Hale, et al. (1995). White-tailed deer foraging in relation to successional stage, overstory type and management of Southern Appalachian forests. American Midland Naturalist 133(1): 18-35. {a} Warnell Sch. For. Resources, Univ. Ga., Athens, GA 30602, USA

Meldahl, K. H., D. Scott, et al. (1995). Autochthonous leaf assemblages as records of deciduous forest communities: An actualistic study. Lethaia 28(4): 383-394. Dep. Geol., Oberlin Coll., Oberlin, OH 44074, USA

Mikan, C. J. and M. D. Abrams (1995). Altered forest composition and soil properties of historic charcoal hearths in southeastern Pennsylvania. Canadian Journal of Forest Research 25(5): 687-696. {a} Univ. Mich., Sch. Natural Resources Environ., Dana Build. 430 E. University, Ann Arbor, MI 48109-1115, USA

Suberkropp, K. (1995). The influence of nutrients on fungal growth, productivity, and sporulation during leaf breakdown in streams. Canadian Journal of Botany 73(Suppl. 1 Sect. E-H): S1361-S1369. Dep. Biological Sci., Univ. Alabama, Tuscaloosa, AL 35487-0344, USA

Suberkropp, K. and E. Chauvet (1995). Regulation of leaf breakdown by fungi in steams: Influences of water chemistry. Ecology Washington D C 76(5): 1433-1445. {a} Dep. Biol. Sci., Univ. Alabama, Tuscaloosa, AL 35487-0344, USA

Vogel, S. (1995). Twist-to-bend ratios of woody structures. Journal of Experimental Botany 46(289): 981-985. Dep. Zool., Duke Univ., Durham, NC 27708-0325, USA

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Yin, Z. (1995). The embryological studies of interspecific hybrids between Liriodendron tulipifera L. and L. chinense (Hesml.) Sarg. Forest Research 8(6): 605-610. {a} Nanjing Forestry Univ., Nanjing 210037, China

Abrams, M. D. and M. E. Kubiske (1994). Synchronous changes in tissue water parameters of mature foliage from well-watered and periodically droughted tree seedlings. Journal of Experimental Botany 45(271): 171-177. {a} Pennsylvania State Univ., Sch. Forest Resources, Ferguson Building, University Park, PA 16802, USA

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Cleveland, B. and R. Kjelgren (1994). Establishment of six tree species on deep-tilled minesoil during reclamation. Forest Ecology and Management 68(2-3): 273-280. {a} Dep. Plants, Soils, Biometeorol., Utah State University, Logan, UT 84322, USA

Clinton, B. D., L. R. Boring, et al. (1994). Regeneration patterns in canopy gaps of mixed-oak forests of the southern Appalachians: Influence of topographic position and evergreen understory. American Midland Naturalist 132(2): 308-319. {a} USDA Southeastern Forest Experiment Station, Coweeta Hydrologic Lab., Otto, NC 28763, USA

Cooper, L. W. and R. J. Norby (1994). Atmospheric CO-2 enrichment can increase the 18O content of leaf water and cellulose: Paleoclimatic and ecophysiological implications. Climate Research 4(1): 1-11. Environ. Sci. Div., Oak Ridge Natl. Lab., P.O. Box 2008, Oak Ridge, TN 37831-6038, USA

Dudt, J. F. and D. J. Shure (1994). The influence of light and nutrients on foliar phenolics and insect herbivory. Ecology Tempe 75(1): 86-98. Dep. Biol., Emory Univ., Atlanta, GA 30322, USA

Elliott, K. J. and W. T. Swank (1994). Changes in tree species diversity after successive clearcuts in the Southern Appalachians. Vegetatio 115(1): 11-18. USDA Forest Serv., Southeastern Forest Exp. Stn., Coweeta Hydrol. Lab., Otto, NC 28763, USA

Elliott, K. J. and W. T. Swank (1994). Impacts of drought on tree mortality and growth in a mixed hardwood forest. Journal of Vegetation Science 5(2): 229-236. USDA Forest Serv., Southeastern Forest Exp. Stn., Coweeta Hydrol. Lab., Otto, NC 28763, USA

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Hanson, P. J. and W. A. Hoffman (1994). Emissions of non-methane organic compounds and carbon dioxide from forest floor cores. Soil Science Society of America Journal 58(2): 552-555. {a} Environ. Sci. Div., Oak Ridge Natl. Lab., Oak Ridge, TN 37831-6034, USA

Heckscher, S. (1994). The vegetation of the Glades Region, Cumberland County, New Jersey. Bartonia(58): 101-113. Natural Lands Trust, Inc., 10 Ridley Dr., Wallingford, PA 19086, USA

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Howe, M. J. and K. Suberkropp (1994). Effects of isopod (Lirceus sp.) feeding on aquatic hyphomycetes colonizing leaves in a stream. Archiv fuer Hydrobiologie 130(1): 93-103. Dep. Biol. Sci., Box 870344, University Ala., Tuscaloosa, AL 35487, USA

Hyche, L. L. (1994). The yellow-poplar leaf-mining weevil: A guide to recognition and habits in Alabama. Alabama Agricultural Experiment Station Auburn University Bulletin(622): 1-13. Ala. Agric. Exp. Stn., Auburn Univ., Auburn, AL, USA

Kim, M. H. and S. W. Lee (1994). Injury responses of landscape woody plants to air pollutants: Malondialdehyde content. Journal of Korean Forestry Society 83(1): 25-31. {a} Joongbu Univ., Majon, Chungnam, South Korea

Lajtha, K. (1994). Nutrient uptake in eastern deciduous tree seedlings. Plant and Soil 160(2): 193-199. Dep. Biol., Boston Univ., Boston, MA 02215, USA

Mudrick, D. A., M. Hoosein, et al. (1994). Decomposition of leaf litter in an Appalachian forest: Effects of leaf species, aspects, slope position and time. Forest Ecology and Management 68(2-3): 231-250. {a} Div. Forestry, College Agric. Forestry, West Virginia University, P.O. Box 6125, Morgantown, WV 26506-6125, USA

Nowacki, G. J. and M. D. Abrams (1994). Forest composition, structure, and disturbance history of the Alan Seeger natural area, Huntington County, Pennsylvania. Bulletin of the Torrey Botanical Club 121(3): 277-291. {a} USDA Forest Serv., Alaska Region, P.O. Box 21628, Juneau, AK 99802, USA

Okuyama, T., H. Yamamoto, et al. (1994). Growth stresses in tension wood: Role of microfibrils and lignification. Annales des Sciences Forestieres Paris 51(3): 291-300. {a} Sch. Agric. Sci., Nagoya Univ., Nagoya 464-01, Japan

Orwig, D. A. and M. D. Abrams (1994). Contrasting radial growth and canopy recruitment patterns in Liriodendron tulipifera and Nyssa sylvatica: Gap-obligate versus gap-facultative tree species. Canadian Journal of Forest Research 24(11): 2141-2149. {a} Sch. Forest Resources, Ferguson Building, Pa. State Univ., University Park, PA 16802, USA

Orwig, D. A. and M. D. Abrams (1994). Land-use history (1720-1992), composition, and dynamics of oak-pine forests within the Piedmont and Coastal Plain of northern Virginia. Canadian Journal of Forest Research 24(6): 1216-1225. {a} Sch. Forest Resources, Pa. State Univ., University park, PA 16802, USA

Parks, C. R., J. F. Wendel, et al. (1994). The significance of allozyme variation and introgression in the Liriodendron tulipifera complex (Magnoliaceae). American Journal of Botany 81(7): 878-889. {a} Dep. Biol., CB 3280, University North Carolina, Chapel Hill, NC 27599-3280, USA

Rhoads, A. F. (1994). Magnolia tripetala in Pennsylvania. Bartonia(58): 75-77. Morris Arboretum, Univ. Pa., 9414 Meadowbrook Ave., Philadelphia, PA 19118, USA

Taylor, D. D. (1994). Schisandra glabra (Schisandraceae) new to Kentucky. SIDA Contributions to Botany 16(1): 213-214. USDA Forest Serv., Daniel Boone Natl. Forest, 1835 Bighill Rd., Berea, KY 40403, USA

Teixeira, E. P. and C. S. A. Casari (1994). Description of larva and pupa of Xylophilus othoides, (Fleutiaux, 1899) (Coleoptera, Eucnemidae, Melasinae). Iheringia Serie Zoologia(76): 43-47. {a} Inst. Forestal, Cx. Postal 1322, 01059-970 Sao Paulo, SP, Brazil

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Cannon, W. N., Jr., B. R. Roberts, et al. (1993). Growth and physiological response of water-stressed yellow-poplar seedlings exposed to chronic ozone fumigation and ethylenediurea. Forest Ecology and Management 61(1-2): 61-73. {a} USDA Forest Serv., Northeastern Forest Experiment Station, Delaware, OH 43015, USA

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Cusset, G. (1993). Kinetics of the sepal vascular units of Fittonia verschaffeltii. Canadian Journal of Botany 71(6): 863-871. Univ. Pierre et Marie Curie, Lab. de Phytologie Quantitative, Boite 31, 4 Place Jussieu, 75252 Paris Cedex 05, France

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Gunderson, C. A., R. J. Norby, et al. (1993). Foliar gas exchange responses of two deciduous hardwoods during 3 years of growth in elevated CO-2: No loss of photosynthetic enhancement. Plant Cell and Environment 16(7): 797-807. {a} Environmental Sci. Div., Oak Ridge Natl. Lab., P.O. Box 2008, Oak Ridge, TN 37831-6034, USA

Hannah, P. R. (1993). Composition and development of two Appalachian hardwood stands in North Carolina. Journal of the Elisha Mitchell Scientific Society 109(2): 87-98. Univ. Vermont, Sch. Natural Resources, Dep. Forestry, Burlington, VT 05405-0088, USA

Kim, M. H. and S. W. Lee (1993). Injury responses of woody landscape plants to air pollutants (I): Sulfur and heavy metal content. Journal of Korean Forestry Society 82(3): 271-282. {a} Joongbu Univ., Majon, Chungnam, South Korea

Kim, M. H. and S. W. Lee (1993). Injury responses of landscape woody plants to air pollutants: Visible injury and ethylene production. Journal of Korean Forestry Society 82(4): 328-336. {a} Joongbu Univ., Majon, Chungnam, Korea

Maeda, Y., Y. Yamamoto, et al. (1993). Polymorphisms of egg white proteins in native chickens in Nepal. Animal Science and Technology 64(4): 327-332. {a} Fac. Agric., Kagoshima Univ., Kagoshima-shi 890, Japan

Matsui, M., R. Imaichi, et al. (1993). Ovular development and morphology in some Magnoliaceae species. Journal of Plant Research 106(1084): 297-304. {a} Fac. Agric., Tamagawa Univ., 6-1-1 Tamagawagakuen, Machida, Tokyo 194, Japan

McClenahen, J. R. and J. P. Vimmerstedt (1993). Soil, climate and atmospheric deposition relationships with elemental concentrations in annual rings of tulip tree. Journal of Environmental Quality 22(1): 23-32. {a} Sch. Natural Resources, Ohio Agric. Res. Dev. Center, Ohio State Univ., Wooster, OH 44691

McNab, W. H. (1993). A topographic index to quantify the effect of mesoscale landform on site productivity. Canadian Journal of Forest Research 23(6): 1100-1107. USDA Forest Serv., Southeastern Forest Experiment Station, Asheville, NC 28806, USA

Risley, L. S. (1993). Effect of simulated insect herbivore damage on survival of tree leaves. Environmental Entomology 22(1): 57-61. Dep. Biol., William Paterson College, Wayne, NJ 07470, USA

Schulte, P. J. and A. L. Castle (1993). Water flow through vessel perforation plates: A fluid mechanical approach. Journal of Experimental Botany 44(264): 1135-1142. {a} Dep. Biol. Sci., Univ. Nevada, Las Vegas, NV 89154-4004, USA

Schulte, P. J. and A. L. Castle (1993). Water flow through vessel perforation plates: The effects of plate angle and thickness for Liriodendron tulipifera. Journal of Experimental Botany 44(264): 1143-1148. {a} Dep. Biol. Sci., Univ. Nevada, Las Vegas, NV 89154-4004, USA

Scriber, J. M. (1993). Absence of behavioral induction in oviposition preference of Papilio glaucus (Lepidoptera: Papilionidae). Great Lakes Entomologist 26(2): 81-95. Dep. Entomol., Michigan State Univ., East Lansing, MI 48224-1115, USA

Shumway, D. L., K. C. Steiner, et al. (1993). Variation in seedling hydraulic architecture as a function of species and environment. Tree Physiology 12(1): 41-54. {a} Dep. Biol., 208 Mueller Lab., Pa. State Univ., University Park, PA 16802, USA

Shure, D. J. and L. A. Wilson (1993). Patch-size effects on plant phenolics in successional openings of the Southern Appalachians. Ecology Washington D C 74(1): 55-67. Dep. Biol., Emory University, Atlanta, GA 30322, USA

Wei, Z. X. and Z. Y. Wu (1993). Pollen ultrastructure of Liriodendron and its systematic significance. Acta Botanica Yunnanica 15(2): 163-166. Kunming Inst. Bot., Acad. Sinica, Kunming 650204, China

Williams, C. E. (1993). Age structure and importance of naturalized Paulownia tomentosa in a central Virginia streamside forest. Castanea 58(4): 243-249. Dep. Biol., Clarion Univ. Pa., Clarion, PA 16214-1232, USA

Wilson, A. D. and D. J. Shure (1993). Plant competition and nutrient limitation during early succession in the Southern Appalachian Mountains. American Midland Naturalist 129(1): 1-9. Dep. Biol., Emory Univ., Atlanta, Ga. 30322

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Guelz, P. G., E. Mueller, et al. (1992). Chemical composition and surface structures of epicuticular leaf waxes of Ginkgo biloba, Magnolia grandiflora and Liriodendron tulipifera. Zietschrift fuer Naturforschung Section C Journal of Biosciences 47(7-8): 516-526. {a} Botanisches Inst., Univ. Koeln, Gyrhofstr. 15, D-W-5000 Koeln 41, Germany

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Kim, M. H. and S. W. Lee (1992). Resistance functions of woody landscape plants to air pollutants: (I). SOD activity. Journal of Korean Forestry Society 81(2): 164-176. {a} Chungbu Socio-Industrial Coll., Majon, Chungnam, North Korea

Ljubesic, N. and D. Matijevic (1992). The effect of amitrole on the pigment composition and ultrastructure of chromoplasts of tulip tree flowers. Acta Botanica Croatica 51: 13-19. Inst. Ruder Boskovic, P.O.B. 1016, 41001 Zagreb, Hrvatska, Croatia

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