Bibiography:  Author Listing
Author group 'H'


Hagen, S.H. 1941. A revision of the North American species of the genus Anisacanthus Ann. Missouri Bot. Gard. 28:385-408.

Hall, D. W. 1978. The grasses of Florida. Ph.D. Disseration. The University of Florida, Tampa.

Hall, E. 1873. Plantae Texanae: A list of the plants collected in eastern Texas in 1872, and distributed to subscribers Published by the author, Salem, MA.

Hall, E.R. and K.R. Kelson. 1959. The mammals of North America (2 vols.) The Ronald Press Company, New York.

Hall, G.W. 1967. A biosystematic study of the North American complex of the genus Bidens (Compositae) Ph.D. dissertation, Indiana Univ., Bloomington.

Hall, G.W., G.M. Diggs, Jr., D.E. Soltis, and P.S. Soltis. 1990. Genetic uniformity of El Arbol del Tule Madroño 37:1-5.

Hall, H. M. 1928. The genus Haplopappus. Carnegie Institution of Washington, Publication No. 389.

Hall, H.M. and F.E. Clements. 1923. The phylogenetic method in taxonomy: The North American species of Artemisia, Chrysothamnus and Atriplex Publ. Carnegie Inst. Wash. 326:1-355.

Hall, M.T. 1952. Variation and hybridization in Juniperus Ann. Missouri Bot. Gard, 39:1-64.

Hall, T.F. 1940. The biology of Saururus cernuus L Amer. Midl. Naturalist 24:253-260.

Hall, T.F. and W.T. Pendfound. 1944. The biology of the American lotus, Nelumbo lutea (Willd.) Pers Amer. Midl. Naturalist 31:744-758.

Hallmark, T.C. 1993. The nature and origin of the Blackland soils. In: M.R. Sharpless and J.C. Yelderman, eds The Texas Blackland Prairie, land, history, and culture Pp. 41-47, Baylor Univ. Program for Regional Studies, Waco, TX.

Ham, H. 1984. South Texas Wildflowers. Conner Museum, Texas A&I University, Kingsville.

Hamby, R.K. and E. A. Zimmer. 1992. Ribosomal RNA as a phylogenetic tool in plant systematics In: P.S. Soltis, D.E. Soltis, and J.J. Doyle, eds, Molecular systematics of plants Pp. 50-91, Chapman and Hall, New York.

Hamilton, W. 1983. Cretaceous and Cenozoic history of the northern continents Ann. Missouri Bot. Gard. 70:440-458.

Handell, S.N. 1978. New ant-dispersed species in the genera Carex, Luzula, and Claytonia Canad. J. Bot. 56:2925-2927.

Hanesworth, V. 1993. Crepis setosa (Asteraceae) a newly established introductant in Central Texas. Sida 15(4):658.

Hanks, L.T. and J.K. Small. 1907. Geraniaceae N. Amer. Fl. 25:3-24.

Hansen, B. F. and R. P. Wunderlin. 1988. Synopsis of Dichanthelium (Poaceae) in Florida. Annals of the Missouri Botanical Garden 75:1637-1657.

Hanson, H.C. 1920. Key to the malvaceous plants in Texas Texas Agric. Exp. Sta. 22:5-18.

Hara, H. 1969a. The correct author's name of Citrullus lanatus (Cucurbitaceae) Taxon 18:346-347.

Hara, H. 1969b. Remarkable examples of speciation in Asiatic plants Amer. J. Bot. 56:732-737.

Hara, H. 1975. The identity of Clematis terniflora DC J. Jap. Bot. 50:155-188.

Harcombe, P. A. and P. L. Marks. 1979. Forest vegetation of the Big Thicket National Preserve: report. Report to Office of Natural Sciences, Southwest Region, National Park Service, Santa Fe, NM.

Hardin, J. W. 1957b. A revision of the American Hippocastanaceae. II. Brittonia 9(4):173-195.

Hardin, J. W. 1971. Studies of the southeastern United States flora. II. The gymnosperms. Journal of the Elisha Mitchell Scientific Society 87:43-50.

Hardin, J. W. 1972. Studies of the southeastern United States flora. III. Magnoliaceae and Illiceaceae. Journal of the Elisha Mitchell Scientific Society 88:30-32.

Hardin, J. W. 1990. Variation patterns and recognition of varieties of Tilia americana. Systematic Botany 15(1):33-48.

Hardin, J.W. 1957a. A revision of the American Hippocastanaceae Brittonia 9:145-171.

Hardin, J.W. 1957c. Studies in the Hippocastanaceae. III. A hybrid swarm in the buckeyes Rhodora 59:45-51.

Hardin, J.W. 1957d. Studies in the Hippocastanaceae. IV. Hybridization in Aesculus Rhodora 59:185-203.

Hardin, J.W. 1974. Studies of the southeastern United States flora. IV. Oleaceae Sida 5:274-285.

Hardin, J.W. 1975. Hybridization and introgression in Quercus alba J. Arnold Arbor. 56:336-363.

Hardin, J.W. and C.F. Brownie. 1993. Plants poisonous to livestock and pets in North Carolina North Carolina Agricultural Research Service, North Carolina State Univ., Raleigh, Bull. No. 414 (revised).

Hardin, J.W. and J.M. Arena. 1974. Human poisoning from native and cultivated plants, 2nd ed Duke Univ. Press, Durham, NC.

Harlan, J. R. and J. M. J. de Wet. 1970. A guide to the species of Cynodon (Gramineae). B-673, Oklahoma Agricultural Experiment Station Bulletin, Oklahoma State University.

Harlan, J. R., J. M. J. de Wet, and W. L. Richardson. 1969. Hybridization studies with species of Cynodon from East Africa and Malagasy. American Journal of Botany 56(8):944-950.

Harley, R.M. and T. Reynolds, eds. 1992. Advances in Labiate science The Royal Botanic Gardens, Kew, England, U.K.

Harms, L. J. 1970. Juncus kansanus: a synonym of J. brachyphyllus (Juncaceae). Sida 3:525-528.

Harms, L. J. 1972. Cytotaxonomy of the Eleocharis tenuis complex. American Journal of Botany 59:483-487.

Harms, L.J. 1968. Cytotaxonomic studies in Eleocharis subser. Palustres: Central United States taxa Amer. J. Bot. 55:966-974.

Harms, V.L. 1965. Biosystematic studies in the Heterotheca subaxillaris complex Trans. Kansas Acad. Sci. 68:244-257.

Harms, V.L. 1968. Nomenclatural changes and taxonomic notes on Heterotheca, including Chrysopsis, in Texas and adjacent states Wrightia 4:8-20.

Harms, V.L. 1974. A preliminary conspectus of Heterotheca sect. Chrysopsis Castanea 39:155-165.

Harper, R.M. 1936. Is Acorus calamus native in the United States? Torreya 36:143-147.

Harper, R.M. 1945. Erythronium albidum in Alabama, and some of its relatives Castanea 10:1-7.

Harriman, N. A. 1999. Synopsis of New World Commicarpus (Nyctaginaceae). Sida 18(3): 679-684.

Harris, MK 2001. IPM, what has it delivered? A Texas case history emphasizing cotton, sorghum, and pecan Plant Disease, 85 (2) pp. 112-121, 2001

Harrison, D.E. and E.O. Beal. 1964. The Lemnaceae (Duckweeds) of North Carolina J. Elisha Mitchell Sci. Soc. 80:13-18.

Hart, J. A. and R. A. Price. 1990. The genera of Cupressaceae (including Taxodiaceae) in the southeastern United States. Journal of the Arnold Arboretum 71(3):275-322.

Hart, T. W. and W. H. Eshbaugh. 1976. The biosystematics of Cardamine bulbosa (Muhlenb.) B.S.P. and C. douglassii Britt. Rhodora 78:329-419.

Harte, C. 1994. Oenothera: Contributions of a plant to biology Springer-Verlag, New York.

Hartman, R. L. 1979. Cerastium clawsonii (Caryophyllaceae): a synonym of Linum hudsonioides (Linaceae). Rhodora 81:283.

Hartman, R. L. and M. A. Lane. 1987. A new species of Machaeranthera section Psilactis (Asteraceae-Astereae) from Central Texas. Brittonia 39:253-257.

Hartman, R. L., J. D. Bacon, and C. F. Bohnstedt. 1975. Biosystematics of Draba cuneifolia and D. platycarpa (Cruciferae) with emphasis on volatile and flavonoid constituents. Britonnia 27:317-327.

Hartman, R.L. 1986. Asclepiadaceae. In: Great Plains Flora Association Flora of the Great Plains. Pp. 614-637, Univ. Press of Kansas, Lawrence.

Hartman, R.L. 1990. A conspectus of Machaeranthera (Asteraceae: Astereae) Phytololgia 68:439-465.

Hartmann, H.E.K. 1993. Aizoaceae. In: K. Kubitzki, J.C. Rohwer, and V. Bittrich, eds The families and genera of vascular plants, Vol. II Pp. 37-69, Springer-Verlag, Berlin.

Hartog, C. D. 1959. A key to the species of Halophila (Hydrocharitaceae), with descriptions of the American species. Acta Botanica Neerlandica 8(4):484-489.

Hartog, C. D. 1964. An approach to the taxonomy of the sea-grass genus Halodule Endl. (Potamogetonaceae). Blumea 12(2):289-312.

Hartog, C. D. 1970. The sea-grasses of the world. Mémoires de l'academie royale des sciences coloniales. Classe des sciences naturelles et médicales. Verhandelingen. Koninklike academie voor koloniale wetenschappen. Klassse der natuur--en geneeskundige wetenschappen. Br

Hartog, C. D. and F. V. D. Plas. 1970. A synopsis of the Lemnaceae. Blumea 18:355-368.

Hartzell, H.R., Jr. 1991. Yew tree: A thousand whispers: Biography of a species Hulogois, Eugene, OR.

Hartzell, H.R., Jr. 1995. Yew and us: A brief history of the yew tree. In: M. Suffness, ed;Taxol(r): Science and applications Pp. 27-34 CRC Press, Boca Raton, FL.

Harvey, L. H. 1948. Eragrostis in North and Middle America. Ph.D. Disseration. University of Michigan, Ann Arbor.

Harvey, W.D. 1998. Harmful or potentially harmful fish, shellfish, and aquatic plants. In: Texas Administrative Code Title 31, Part 2 (Texas Parks and Wildlife Department regulations), Chapter 57, subchapter A, section 57.111--112.

Hatch, S. L. 1975. A biosystematic study of the Schizachyrium cirratum-S. sanguineum complex. Ph.D. Disseration. Texas A&M University, College Station.

Hatch, S. L. 1978. Nomenclatural changes in Schiazchyrium (Poaceae). Brittonia 30(4):496.

Hatch, S. L. 1984. A new combination in Poaceae. Sida 10(4):321.

Hatch, S. L. 1995. Salvinia minima (Salviniaceae), new to Texas. Sida 16(3):595.

Hatch, S. L. and C. A. Clark. 1977. New plant distribution and extension records for Texas and the U. S. Southwestern Naturalist 22:139-140.

Hatch, S. L. and D. A. Bearden. 1983. Stipa curvifolia (Poaceae)-studies on a rare taxon. Sida 10(2):184-187.

Hatch, S. L., D. J. Rosen, J. A. Thomas, and J. E. Dawson III. 1998. Luziola peruviana (Poaceae: Oryzeae) previously unreported from Texas and a key to Texas species. get ref

Hatch, S. L., K. N. Gandhi, and L. E. Brown. 1990. Checklist of the Vascular Plants of Texas. MP-1655, Texas Agricultural Experiment Sation. College Station.

Hatch, S. L., W. E. Fox III, J. E. Dawson III, and W. B. Godwin. 1998. Triraphis mollis (Poaceae: Arundineae) a species reported new to the United States. Sida 18(1): 365-368.

Haufler, C. H. 1979. A biosystematic revision of Bommeria. Journal of the Arnold Arboretum 60:445-476.

Hauke, R. L. 1963. A taxonomic monograph of Equisetum subgenus Hippochaete. Beichefte zur Nova Hedwigia 8:1-123.

Hauke, R. L. 1966. A systematic study of Equisetum arvense. Beichefte zur Nova Hedwigia 13:81-109.

Hauke, R. L. 1978. A taxonomic monograph of Equisetum subgenus Equisetum. Beichefte zur Nova Hedwigia 30:385-455.

Hauke, R.L. 1993. Equisetaceae. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 2:76-84 Oxford Univ. Press, New York and Oxford.

Hausman, E.H. 1950. A Christmas herb Horticulture 28:437, 458.

Havard, V. 1885. Report on the flora of western and southern Texas Proc. U.S. Natl. Mus. 8:449-533.

Havard, V. 1896. Drink plant of the North American Indians Bull. Torrey Bot. Club 23:33-46.

Hawkes, J.G., R.N. Lester, and A.D. Skelding, eds. 1979. The biology and taxonomy of the Solanaceae Linnean Society Symposium Series No. 7, Academic Press, London, England, U.K.

Hawkes, J.G., R.N. Lester, M. Nee, and N. Estradar., eds. 1991. Solanaceae III: Taxonomy, chemistry, evolution Royal Botanic Gardens, Kew, England, U.K.

Hayes, T. 1992. Endangered, threatened, and watch list of natural communities of Texas. Publication No. 8. Texas Organization for Endangered Species, Austin.

Haynes, R. R. 1969. Conopholis alpina Liebmann var. mexicana (Gray ex Watson) Haynes, comb. nov. (Orobanchaceae). Sida 3:347.

Haynes, R. R. 1971. A monograph of the genus Conopholis (Orobanchaceae). Sida 4:246-264.

Haynes, R. R. 1977. The Najadaceae in the southeastern United States. Journal of the Arnold Arboretum 58(2):161-170.

Haynes, R. R. 1978. The Potamogetonaceae in the southeastern United States. Journal of the Arnold Arboretum 59(2):170-191.

Haynes, R. R. 1979. Revision of North and Central American Najas (Najadaceae). Sida 8(1):34-56.

Haynes, R. R. 1985. A revision of the clasping-leaved Potamogeton (Potamogetonaceae). Sida 11(2):173-188.

Haynes, R. R. 1986. Typification of Linnaean species of Potamogeton (Potamogetonaceae). Taxon 35(3):325-332.

Haynes, R. R. 1987. The Zannichelliaceae in the southeastern United States. Journal of the Arnold Arboretum 68(2):259-268.

Haynes, R. R. and L. B. Holm-Nielsen. 1994. The Alismataceae. Flora Neotropica. Monograph 64:1-112.

Haynes, R.R. 1968. Potamogeton in Louisiana The Proc. Louisiana Acad. Sci. 31:82-90.

Haynes, R.R. 1974. A revision of North American Potamogeton subsection Pusilli (Potamogetonaceae) Rhodora 76:564-649.

Haynes, R.R. and C.B. Hellquist. 1996. New combinations in North American Alismatidae Novon 6:370-371.

Haynes, R.R. and L.B. Holm-nielsen. 1986. Notes on Echinodorus (Alismataceae) Brittonia 38:325-332.

Haynes, R.R. and L.B. Holm-nielsen. 1987. The Zannichelliaceae in the southeastern United States J. Arnold Arbor. 68:259-268.

Haynes, R.R. and W.A. Wentz. 1974. Notes on the genus Najas (Najadaceae) Sida 5:259-264.

Hayward, O.T. and J.C. Yelderman. 1991. A field guide to the Blackland Prairie of Texas, from frontier to heartland in one long century Program for Regional Studies, Baylor Univ., Waco, TX.

Hayward, O.T., P.N. Dolliver, D.L. Amsbury, and J.C. Yelderman. 1992. A field guide to the Grand Prairie of Texas, land, history, culture Program for Regional Studies, Baylor Univ., Waco, TX.

Heard, S. B. and J. C. Semple. 1988. The Solidago rigida complex (Compositae: Astereae): a multivariate morphometric analysis and chromosome numbers. Canadian Journal of Botany 66:1800-1807.

Heath, P. V. 1992. The type of Ancistrocactus (Cactaceae). Taxon 41(2):329-331.

Heckard, L. R. 1973. Studies in Orobanchaceae. Madroño 22:41-70.

Heep, M. R. and R. I. Lonard. 1986. Esenbeckia berlandieri (Rutaceae) rediscovered in extreme southern Texas. Southwestern Naturalist 31:259-260.

Heil, K. D. and S. Brack. 1986. The cacti of Guadalupe Mountains National Park. Cactus and Succulent Journal 58:165-177.

Heil, K. D. and S. Brack. 1988. The cacti of Big Bend National Park. Cactus and Succulent Journal 60:17-34.

Heil, K., B. Armstrong, and D. Schleser. 1981. A review of the genus Pediocactus. Cactus and Succulent Journal 53:17-39.

Heiser, C.B., Jr. 1951. The sunflower among the Noth American Indians Proc. Amer. Phil. Soc. 95:432-448.

Heiser, C.B., Jr. 1954. Variation and subspeciation in the common sunflower, Helianthus annuus Amer. Mid. Naturalist 52:287-305.

Heiser, C.B., Jr. 1969. Nightshades: The paradoxical plants W.H. Freeman and Co., San Francisco, CA.

Heiser, C.B., Jr. 1978. The totora (Scirpus californicus) in Ecuador and Peru Econ. Bot. 32:222-236.

Heiser, C.B., Jr. 1979. The gourd book Univ. of Oklahoma Press, Norman.

Heiser, C.B., Jr. 1987. The fascinating world of the nightshades Dover Publications, Inc., New York.

Heiser, C.B., Jr. 1990a. Seed to civilization, the story of food, new ed Harvard Univ. Press, Cambridge, MA.

Heiser, C.B., Jr. 1990b. New perspectives on the orgin and evolution of New World domesticated plants: Summary Econ. Bot. 44 (Suppl.):111-116.

Heiser, C.B., Jr. 1993. Ethnobotany and economic botany. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 1:199-206 Oxford Univ. Press, New York and Oxford.

Heiser, C.B., Jr. and B. Pickersgill. 1975. Names for the bird peppers [Capsicum - Solanaceae] Baileya 19:151-156.

Heiser, C.B., Jr. and E.E. Shilling. 1990. The genus Luffa: A problem in phytogeography. In: D.M. Bates, R.W. Robinson, and C. Jeffrey, eds Biology and utilization of the Cucurbitaceae Pp. 120-133, Cornell Univ. Press, Ithaca, NY.

Heiser, C.B., Jr. and P.G. Smith. 1953. The cultivated Capsicum peppers Econ. Bot, 7:214-227.

Heiser, Jr., C. B., D. M. Smith, S. B. Clevenger, and W. C. Martin, Jr. 1969. The North American sunflowers (Helianthus). Memoirs of the Torrey Botanical Club 22:1-218.

Heisey, R.M. 1990. Allelopathic and herbicidal effects of extracts from tree of heaven (Ailanthus altissima) Amer. J. Bot. 77:662-670.

Heisey, R.M. 1996. Identification of an allelopathic compound from Ailanthus altissima (Simaroubaceae) and characterization of its herbicidal activity Amer. J. Bot. 83:192-200.

Henderson, A., G. Galeano, and R. Bernal. 1995. Field guide to the palms of the Americas Princeton Univ. Press, Princeton, NJ.

Henderson, N.C. 1962. A taxonomic revision of the genus Lycopus (Labiatae) Amer. Midl. Naturalist 68:95-138.

Hendrick, A.J. 1957 [1958]. A revision of the genus Alisma (Dill.) L Amer. Midl. Naturalist 58:470-493.

Hennen, J. E. 1950. The true clovers (Trifolium) of Texas. Field and Labratory 18:159-164.

Hennen, J.F. 1951. The sweet clovers (Melilotus) of Texas Field & Lab. 19:87-89.

Henrard, J. T. 1950. Monograph of the genus Digitaria. Leiden: Universitare Pers Leiden.

Henrickson, J. 1972. A taxonomic revision of the Fouquieriaceae. Aliso 7:439-537.

Henrickson, J. 1983. A revision of Samolus ebracteatus (sensu lato) (Primulaceae). Southwestern Naturalist 28:303-314.

Henrickson, J. 1985. A taxonomic revision of Chilopsis (Bignoniaceae). Aliso 11:179-197.

Henrickson, J. 1986a. Anisacanthus quadrifidus sensu lato (Acanthaceae). Sida 11:286-299.

Henrickson, J. 1986b. Notes on Rosaceae. Phytologia 60:468.

Henrickson, J. 1987a. Notes on Cynanchum (Asclepiadaceae). Sida 12:91-99.

Henrickson, J. 1987b. A taxonomic reevaluation of Gossypianthus and Guilleminea (Amaranthaceae). Sida 12:307-337.

Henrickson, J. 1988. A revision of the Atriplex acanthocarpa complex (Chenopodiaceae). Southwestern Naturalist 33:451-463.

Henrickson, J. 1989. A new species of Leucospora (Scrophulariaceae) from the Chihuahuan Desert of Mexico Aliso 12:435-439.

Henrickson, J. 1993. Amaranthaceae. In: J.C. Hickman, ed;The Jepson manual: Higher plants of California Pp. 130-134 Univ. of California Press, Berkeley.

Henrickson, J. 1996a. Studies in Macrosiphonia (Apocynaceae): generic recognition of Telosiphonia. Aliso 14(3): 179-195.

Henrickson, J. 1996b. Notes on Spigelia (Loganiaceae). Sida 17(1):89-103.

Henrickson, J. 1999. Studies in New World Amaranthus (Amaranthaceae). Sida 18(3): 783-807.

Henrickson, J. and E. J. Lott. 1982. New combinations in Chihuahuan Desert Anisacanthus (Acanthaceae). Brittonia 34:170-176.

Henrickson, J. and R. A. Hilsenbeck. 1979. New taxa and combinations in Siphonoglossa (Acanthaceae). Brittonia 31:373-378.

Henrickson, J. and S. Sunberg. 1986. On the submersion of Dicraurus into Iresine (Amaranthaceae). Aliso 11:355-364.

Henrickson, J. and T. F. Daniel. 1979. Three new species of Carlowrightia (Acanthaceae) from the Chihuahuan Desert Region. Madroño 26:26-36.

Hepper, F.N. 1990. Pharaoh's flowers: The botanical treasures of Tutankhamun HMSO, London, England, U.K.

Hepper, F.N. 1992. Illustrated encyclopedia of Bible plants Intervarsity Press, Leicester, England, U.K.

Herman, W. C. 1915. The botany of Texas: an account of botanical investigations in Texas and adjoining territory. Bulletin of the University of Texas, No. 18, Austin.

Hermann, F. J. 1970. Manual of the Carices of the Rocky Mountains and Colorado Basin. Agricultural Handbook 374, United States Department of Agriculture, Washington, D.C.

Hermann, F. J. 1975. Manual of the Rushes (Juncus spp.) of the Rocky Mountains and Colorado Basin. Forest Service General Technical Report RM-18, United States Department of Agriculture, Fort Collins, CO.

Hermann, F.J. 1936. Diagnostic characteristics in Lycopus Rhodora 38:373-375.

Hermann, F.J. 1953. A botanical synopsis of the cultivated clovers (Trifolium) U.S.D.A. Monogr. 22:1-45.

Hermann, F.J. 1954a. Addenda to North American carices Amer. Midl. Naturalist 51:265-286.

Hermann, F.J. 1954b. A synopsis of the genus Arachis U.S.D.A. Monogr. 19:1-26.

Hermann, F.J. 1960. Vicia: Vetches of the United States-native, naturalized, and cultivated U.S.D.A. Handb. No. 168.

Hermann, F.J. 1962. A revision of the genus Glycine and its immediate allies U.S.D.A. Techn. Bull. 1268:1-82.

Herndon, A. 1992. Nomenclatural notes on North American Hypoxis (Hypoxidaceae). Rhodora 94(877):43-47.

Hershkovitz, M.A. and E.A. Zimmer. 1997. On the evolutionary origins of the cacti Taxon 46:217-232.

Hess, W. J. and J. Henrickson. 1987. A taxonomic revision of Vauquelinia (Rosaceae). Sida 12:101-163.

Hess, W.J. 1968. Variation in Amelanchier (Rosaceae) and Centaurium (Gentianaceae) Proc. Oklahoma Acad. Sci. 47:19-21.

Hevly, R. H. 1965. Studies of the sinuous cloak fern (Notholaena sinuata) complex. Journal of the Arizona Academy of Science 3:205-208.

Hewitson, W. 1962. Comparative morphology of the Osmundaceae. Annals of the Missouri Botanical Garden 49:57-93.

Heyn, C.C. and B. Pazy. 1989. The annual species of Adonis (Ranunculaceae)--A polyploid complex Pl. Syst. Evol, 168:181-193.

Heywood, J.S. and D.A. Levin. 1984. Allozyme variation in Gaillardia pulchella and G. amblyodon (Compositae): Relation to morphological and chromosomal variation and to geographical isolation Syst. Bot. 9:448-457.

Heywood, V. H. and C. J. Humphries. 1977. Anthemideae-systematics review. In. V. H. Heywood, J. B. Harborne, and B. L. Turner (eds.). The Biology and Chemistry of the Compositae 2:851-898.

Heywood, V. H., J. B. Harborne, and B. L. Turner (eds.). 1977. The Biology and Chemistry of the Compositae. Vols. I -II. Academic Press, London, U.K.

Heywood, V.H., ed. 1993. Flowering plants of the world Oxford Univ. Press, New York.

Hibbard, C.W. 1960. An interpretation of Pliocene and Pleistocene climates in North America Michigan Acad. Sci. Arts Letters, 62nd Ann. Report (for 1959-1960), pp. 5-30.

Hickey, M. and C. King. 1997. Common families of flowering plants Cambridge Univ. Press, Cambridge, England, U.K.

Hickman, J.C., ed. 1993. The Jepson manual: Higher plants of California Univ. of California Press, Berkeley.

Hicks, L.E. 1937. The Lemnaceae of Indiana Amer. Midl. Naturalist 18:774-789.

Hicks, R. R. and G. K. Stephenson. 1978. Woody plants of the Western Gulf Region. Kendall/Hunt Publishing Company, Dubuque, IA.

Hiern, W.P. 1873. A monograph of Ebenaceae Trans. Cambridge Philos. Soc. 12:27-300.

Higgins, L. C. 1971. A revision of Cryptantha subgenus Oreocarya. Brigham Young University, Science Bulletin, Biological series 12:1-63.

Higgins, L. C. 1974. Rumex venosus (Polygonaceae) new to Texas. Southwestern Naturalist 19:329.

Highnight, K. W., J. K. Wipff, and S. L. Hatch. 1988. Grasses (Poaceae) of the Texas Cross Timbers and Prairies. MP-1657, Texas Agricultural Experiment Station, College Station.

Hill, HSJ; Park, J; Mjelde, JW; Rosenthal, W; Love, HA; Fuller, SW 2000. Comparing the value of Southern Oscillation Index-based climate forecast methods for Canadian and US wheat producers Agricultural and Forest Meteorology, 100 (4) pp. 261-272, 2000

Hill, R.T. 1887. The topography and geology of the Cross Timbers and surrounding regions in northern Texas Amer. J. Sci. (3rd series) 133:291-303.

Hill, R.T. 1901. Geography and geology of the Black and Grand prairies, Texas 21st Annual Report of the U. S. Geological Survey, Part VII-Texas, U. S. Government Printing Office, Washington, D.C.

Hill, S. R. 1979. A revision of the genus Malvastrum A. Gray (Malvaceae: Malveae). Ph.D. Disseration. Texas A&M University, College Station.

Hill, S. R. 1980a. A new county record for Pilularia americana in Texas. American Fern Journal 70:28.

Hill, S. R. 1981. Supplement to flora of the Texas Coastal Bend by F. B. Jones. Sida 9:43-54.

Hill, S. R. 1982. Distributional and nomenclatural notes on the flora of the Texas Coastal Bend. Sida 9:309-326.

Hill, S.R. 1980b. New taxa and combinations in Malvastrum A. Gray (Malvaceae: Malveae) Brittonia 32:464-483.

Hill, S.R. 1982. A monograph of the genus Malvastrum Rhodora 84:1-83, 159-264, 317-409.

Hillard, O.M. and B.L. Burtt. 1981. Some generic concepts in Compositae-Gnaphaliinae J. Linn. Soc., Bot. 82:181-232.

Hines, D. M. 1975. A monograph of the Eleocharis ovata complex (Cyperaceae) in North America. Ph.D. Disseration. The Univesity of Michigan, Ann Arbor.

Hiroe, M. 1979. Umbelliferae of World Ariake Book Company, Tokyo, Japan.

Hitchcock, A. S. 1916. The scope and relations of taxonomic botany. Science 43:331-342.

Hitchcock, A. S. 1935. Manual of the Grasses of the United States. Miscellaneous Publication No. 200, United States Department of Agriculture, Washington, D.C. United States Government Printing Office.

Hitchcock, A.S. 1903. Notes on North American grasses III New species of Willsommia, Bot. Gaz. (Crawfordsville) 35:283-285.

Hitchcock, A.S. 1905. North American species of Agrostis U.S.D.A, Bull. 68:5-64.

Hitchcock, A.S. 1920a. The North American species of Oplismenus Contr. U.S. Natl. Herb. 22:123-132.

Hitchcock, A.S. 1920b. The North American species of Echinochloa Contr. U.S. Natl. Herb. 22:133-153.

Hitchcock, A.S. 1924. The North American species of Aristida Contr. U.S. Natl. Herb. 22:517-586.

Hitchcock, A.S. 1925. The North American species of Stipa: Synopsis of the South American species of Stipa Contr. U.S. Natl. Herb. 24:215-262.

Hitchcock, A.S. 1931-1939. Poaceae (in part) N. Amer. Fl. 17:289-638.

Hitchcock, A.S. 1951. Manual of the grasses of the United States, 2nd ed. revised by A. Chase Reprinted in 1971 by Dover Publications, Inc., New York.

Hitchcock, A.S. and A. Chase. 1910. The North American species of Panicum Contr. U.S. Natl. Herb. 15:1-396.

Hitchcock, C. L. 1936. The genus Lepidium in the United States. Madroño 3:265-300.

Hitchcock, C.L. 1932. A monographic study of the genus Lycium of the western hemisphere Ann. Missouri Bot. Gard, 19:179-374.

Hitchcock, C.L. 1933a. A taxonomic study of the genus Nama I Amer. J. Bot. 20:415-430, 518-534.

Hitchcock, C.L. 1933b. A taxonomic study of the genus Nama II Amer. J. Bot. 20:518-534.

Hitchcock, C.L. 1945. The Mexican, Central American, and West Indian Lepidia Madroño 8:118-143.

Hitchcock, C.L. 1952. A revision of the North American species of Lathyrus Univ. Wash. Publ. Biol. 15:1-104.

Hitchcock, C.L. and B. Maguire. 1947. A revision of the North American species of Silene Univ. Wash. Publ. Biol. 13:1-73.

Hoch, P.C., J.V. Crisci, H. Tobe, and P.E. Berry. 1993. A cladistic analysis of the plant family Onagraceae Syst. Bot. 18:31-47.

Hodgdon, A.R. 1938. A taxonomic study of Lechea Rhodora 40:29-131.

Hoey, M.T. and C.R. Parks. 1994. Genetic divergence in Liquidambar styraciflua, L. formosana, and L. acalycina (Hamamelidaceae) Syst. Bot. 19:308-316.

Hoff, V. J. and E. S. Nixon. 1977. Extension of Gaura demareei into East Texas. Southwestern Naturalist 22:135.

Hoffmann, WC; Coppedge, JR; Lingren, PS; Chandler, LD 2000. Impact of a semiochemical insecticide (Slam registered trade mark sign ) on abundance of beneficial insects in corn Southwestern Entomologist, 25 (1) pp. 31-38, 2000

Hoggard, G.D. 1998. Gaura. In: Tyrl, R.J., S.C. Barber, P. Buck, J.R. Estes, P. Folley, L.K. Magrath, C.E.S. Taylor, and R.A. Thompson (Oklahoma Flora Editorial Committee) Identification of Oklahoma Plants (to be published in 1998), Flora Oklahoma Inc., Noble, OK.

Hoggard, R.K. 1998. Plantaginaceae. In: Tyrl, R.J., S.C. Barber, P. Buck, J.R. Estes, P. Folley, L.K. Magrath, C.E.S. Taylor, and R.A. Thompson (Oklahoma Flora Editorial Committee) Identification of Oklahoma Plants (to be published in 1998), Flora Oklahoma Inc., Noble, OK.

Holley, M.A. 1836. Texas J. Clarke & Co., Lexington, Kentucky, Reprinted 1885 by the Texas State Historical Association, in cooperation with the Center for Studies in Texas History, Univ. of Texas, Austin.

Holm, L.G., D.L. Plucknett, J.V. Pancho, and J.P. Herberger. 1977. The world's worst weeds: Distribution and biology Published for the East-West Center by the Univ. of Hawaii Press, Honolulu.

Holm, R. W. 1950. American species of Sarcostemma. Annals of the Missouri Botanical Garden 37:480.590.

Holm, S. F. 1972. A field guide to the trees, shrubs, and wood vines of Tamberwood, Newton County, Texas. Master's Thesis. Texas A&M University, College Station.

Holmes, W. C. 1983. The distribution of Habenaria integra (Nutt.) Spreng. (Orchidaceae) in Mississippi, Louisiana, and Texas. Southwestern Naturalist 24:451-456.

Holmes, W. C. and B. L. Lipscomb. 1992. First documentation of Mikania cordifolia (Compositae) in Texas. Sida 15(1):163.

Holmes, W. C. and C. J. Wells. 1980. The distribution of Habranthus tubispathus (L'Her.) Taub in North America, Texas and Louisiana. Sida 8:328-333.

Holmes, W. C. and D. E. Wivagg. 1996. Identification and distribution of Centaurium muhlenbergii (Griseb.) Piper and C. pulchellum (Sw.) Druce (Gentianaceae) in Louisiana, Mississippi, and Texas. Phytologia 80(1):23-29. Note: this volume is marked January 1996 but was not published until October 1995.

Holmes, W. C., K. M. Fleming, and J. R. Singhurst. 1999. Triosteum (Caprifoliaceae) in Texas. Sida 18(3): 931-933.

Holmes, W.C. 1990. The genus Mikania (Compositae-Eupatorieae) in Mexico Sida, Bot. Misc. 5:1-45.

Holmes, W.C., T.L. Morgan, J.R. Stevens, and R.D. Gooch. 1996. Comments on the distribution of Botrychium lunarioides (Ophioglossaceae) in Texas Phytologia 80:280-283.

Holmgren, A.H. and N.H. Holmgren. 1977. Aristida In: A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren, Intermountain Flora, Vol. 6 Pp. 457-465, Columbia Univ. Press, New York.

Holmgren, N.H. 1986. Scrophulariaceae. In: Great Plains Flora Association Flora of the Great Plains. Pp. 751-797, Univ. Press of Kansas, Lawrence.

Holmgren, P. K. 1971. A biosystematic study of North American Thlaspi montanum and its allies. Memoirs of the New York Botancial Garden 21:1-106.

Holmgren, P.K., N.H. Holmgren, and L.C. Barnett. 1990. Index herbariorum Part 1: The herbaria of the world, Regnum Veg. Vol. 120.

Holzinger, J. M. 1892. List of plants collected by C. S. Sheldon and M. A. Carleton in the Indian Territory in 1891. II. M. A. Cartleton's collection. Contributions from the United States National Herbarium. Smithsonian Instituion 1(6):202-219.

Hooker, W.J. 1836. Lupinus subcarnosus (Plate 3467), Lupinus texensis (Plate 3492) Bot. Mag. 63.

Hoot, S.B., A.A. Reznicek, and J. Palmer. 1994. Phylogenetic relationships in Anemone (Ranunculaceae) based on morphology and chloroplast DNA Syst. Bot. 19:169-200.

Hoot, S.B., J.W. Dadereit, F.R. Blattner, K.B. Jork, A.E. Schwarzbach, and P.R. Crane. 1997 [1998]. Data congruence and phylogeny of the Papaveraceae s.l. based on four data sets: atpB and rbcL sequences, trnK restriction sites, and morphological characters Syst. Bot. 22:575-590.

Hopkins, C. O. and W. H. Blackwell, Jr. 1977. Synopsis of Suaeda (Chenopodiaceae) in North America. Sida 7:147-173.

Hopkins, M. 1937. Arabis in eastern and central North America Rhodora 39:63-98, 106-148, 155-186.

Hopkins, M. 1942. Cercis in North America Rhodora 44:193-211.

Hornberger, K. L. 1991. The blue-eyed grasses (Sisyrinchium: Iridaceae) of Arkansas. Sida 14:597-604.

Horne, Francis R. and Ari Kahn 2000. Water loss and viability in Zizania (Poaceae) seeds during short-term desiccation Am. J. Bot. 87: 1707-1711.

Horton, J. H. 1972. Studies in the southeastern United States Flora. IV. Polygonaceae. Journal of the Elisha Mitchell Scientific Society 88:92-102.

Horton, J.H. 1963. A taxonomic revision of Polygonella (Polygonaceae) Brittonia 15:177-203.

Hotchkiss, N. and H.L. Dozier. 1949. Taxonomy and distribution of North American cat-tails Amer. Midl. Naturalist 41:237-254.

Hotta, M. and S. Kuroki. 1994. Taxonomical notes on plants of southern Japan. I. Proposal of Zoyzia pacifica stat. nov. (Poaceae). Acta Phytotaxonomica et geobotanica 45:67-74.

Houghton, J.T., G.J. Jenkins, and J.J. Ephraums, eds. 1990. Climate change, the IPCC scientific assessment Cambridge Univ. Press, Cambridge, England, U.K.

House, H.D. 1908. The North American species of the genus Ipomoea New York Acad. Sci. 18:181-263.

Howard, T.M. 1990. Allium texanum [Amaryllidaceae (Alliaceae)]. A new species from central Texas and adjacent Oklahoma Herbertia 46:125-127.

Howe, W.T. 1975. The butterflies of North America Doubleday & Co., Inc., Garden City, NY.

Howell, J.T. 1959. Distribution data on weedy thistles in western North America Leafl. W. Bot. 9:17-29.

Hs, J. 1983. Late Cretaceious and Cenozoic vegetation in China, emphasizing their connections with North America Ann. Missouri Bot. Gard. 70:490-508.

Hu, S.Y. 1954-1956. A monograph of the genus Philadelphus J. Arnold Arbor. 35:275-333; 36:52-109, 326-368; 37:15-90.

Huber, H. 1993. Aristolochiaceae. In: K. Kubitzki, J.C. Rohwer, and V. Bittrich, eds The families and genera of vascular plants, Vol. II Pp. 129-137, Springer-Verlag, Berlin.

Hufford, L. 1992. Rosidae and their relationships to other nonmagnoliid dicotyledons: A phylogenetic analysis using morphological and chemical data Ann. Missouri Bot. Gard. 79:218-248.

Hunt, D. R. 1975. The reunion of Setcreasea and Spathotheca with Tradescantia. American Commelinaceae. I. Kew Bulletin 30:443-458.

Hunt, D. R. 1980. Sections and series in Tradescantia. American Commelinaceae. IX. Kew Bulletin 41(1):437-442.

Hunt, D.R. 1971. Schumann and Buxbaum reconciled;The Schumann system of Mammillaria classification brought provisionally up-to-date Cact. Succ. J. Gr. Brit. 33:53-72.

Hunt, D.R. 1978. Amplification of the genus Escobaria Cact. Succ. J. Gr. Brit. 40:13.

Hunt, D.R. 1986. Campelia, Rhoeo and Zebrina united with Tradescantia American Commelinaceae: XIII, Kew Bull. 41:401-405.

Hunziker, A. T. and A. M. Anton. 1979. A synoptical revision of Blepharidachne. Brittonia 31:446-453.

Hutchinson, J. 1979. The families of flowering plants, 3rd ed Authorized reprint by Otto Koeltz Science Publishers, Koenigstein, West Germany.

Huxley, A., M. Griffiths, and M. Levy, eds. 1992. The new Royal Horticultural Society dictionary of gardening, 4 vols MacMillan Press Limited, London, and Stockton Press, New York.

Hyam, R. and R. Pankhurst. 1995. Plants and their names: A concise dictionary Oxford Univ. Press, New York.

Hymowitz, T. and C.A. Newell. 1981. Taxonomy of the genus Glycine, domestication and uses of soybeans Econ. Bot. 35:272-288.