Bibiography:  Author Listing
Author group 'O'

Oberholser, H.C. 1974. The bird life of Texas Univ. of Texas Press, Austin.

Ockendon, D. J. 1965. A taxonomic study of Psoralea subgenus Pediomelum (Leguminosae). Southwestern Naturalist 10:81-124.

O'donell, C.A. 1959. Las especies americanas de Ipomoea L. Sect. Quamoclit (Moench) Griseb Lilloa 29:19-86.

Oertli, E.H., L.D. Rowe, S.L. Lovering, G.W. Ivie, and E.M. Bailey. 1983. Phototoxic effect of Thamnosma texana (Dutchman's breeches) in sheep Amer. J. Veterin. Res. 44:1126-1129.

Ogden, E.C. 1943. The broad-leaved species of Potamogeton of North America north of Mexico Rhodora 45:57-105,119-163,171-214.

Ogden, E.C. 1966. Potamogetonaceae. In: C.L. Lundell, ed;Flora of Texas 1:369-382 Texas Research Foundation, Renner.

Oka, H. I. 1988. Origin of Cultivated Rice. Developments in Crop Science 14. Japanese Science Society Press, Tokyo.

O'Kennon, B. 1991a. Paliurus spina-christi (Rhamnaceae) new for North America in Texas. Sida 14(4):606-609.

O'Kennon, B. 1991b. Euphorbia lathyris (Euphorbiaceae) new for Texas. Sida 14(4):609-610.

O'Kennon, B. and G. Nesom. 1988. First report of Cirsium vulgare (Asteraceae) from Texas. Sida 13(1):115-116.

O'Kennon, B., G. M. Diggs, Jr., and R. K. Hoggard. 1998. Plantago coronopus (Plantaginaceae) new to Texas. Sida 18(1): 356-358.

O'Kennon, B., T. M. Barkeley, G. M. Diggs, Jr., and B. Lipscomb. 1999. Lapsana communisD1120 (Asteraceae) new for Texas and notes on invasive exotics. Sida 18(4): 1277-1283.

O'Kennon, R. G. M. Diggs, Jr., and B. L. Lipscomb. 1998. Lactuca saligna (Asteraceae), a lettuce new for Texas. Sida 18(2): 615-619.

Olmstead, R.G. and J.D. Palmer. 1992. A chloroplast DNA phylogeny of the Solanaceae: Subfamilial relationships and character evolution Ann. Missouri Bot. Gard. 79:346-360.

Olmstead, R.G. and J.D. Palmer. 1997. Implications for the phylogeny, classification, and biogeography of Solanum from cpDNA restriction site variation Syst. Bot. 22:19-29.

Olmstead, R.G. and P.A. Reeves. 1995. Evidence for the polyphyly of the Scrophulariaceae based on chloroplast rbcL and ndhF sequences Ann. Missouri Bot. Gard. 82:176-193.

Olmstead, R.G., B. Bremer, K.M. Scott, and J.D. Palmer. 1993. A parsimony analysis of the Asteridae sensu lato based on rbcL sequences Ann. Missouri Bot. Gard. 80:700-722.

Olmstead, R.G., H.J. Michaels, K.M. Scott, and J.D. Palmer. 1992. Monophyly of the Asteridae and identification of their major lineages inferred from DNA sequences of rbcL Ann. Missouri Bot. Gard. 79:249-265.

Olsen, J. 1979. Taxonomy of the Verbesina virginica complex (Asteraceae). Sida 8(2):128-134.

Olsen, J. 1985. Synopsis of Verbesina section Ochratinia (Asteraceae) Pl. Syst. Evol. 149:47-63.

Olsen, J.D. G.D. Manners, and S.W. Pelletier. 1990. Poisonous properties of larkspur (Delphinium spp.) Collect. Bot. (Barcelona) 19:141-151.

Olwell, M. 1982. A population study of the exomorphic variations in Vicia minutiflora Dietr. including V. reverchonii Wats. (Leguminosae) Sida 9:215-222.

O'neill, H.T. 1940. Botany of the Maya area: The sedges of the Yucatan Peninsula Carnegie Inst. Wash. Publ. No. 19.

Orgaard, M. 1991. The genus Cabomba (Cabombaceae)-A taxonomic study. Nordic Journal of Botany 11(2):179-204.

Ornduff, R. 1966. The origin of dioecism from heterostyly in Nymphoides (Menyanthaceae) Evolution 20:309-314.

Ornduff, R. 1970. The systematics and breeding system of the Gelsimium (Loganiaceae) J. Arnold Arbor. 51:1-17.

Osborn, J.M. and E.L. Schneider. 1988. Morphological studies of the Nymphaeaceae sensu lato. XVI. The floral biology of Brasenia schreberi Ann. Missouri Bot. Gard. 75:778-794.

Osterhoudt, K.C., S.K. Lee, J.M. Callahan, and F.M. Henretig. 1997. Catnip and the alteration of human consciousness Veterin. Human Toxicol. 39:373-375.

Osterhout, G.E. 1902. Hesperaster nudus (Pursh) Cockerell and its allies Bull. Torrey Bot. Club 29:173-174.

Ottley, A.M. 1944. The American Loti with special consideration of a proposed new section, Simpeteria Brittonia 5:81-123.

Ownbey, G. B. 1958. Monograph of the genus Argemone for North America and the West Indies. Memoirs of the Torrey Botanical Club 21(1):1-159.

Ownbey, G. B. 1959. Monograph of the North American species of Corydalis. Annals of the Missouri Botanical Garden 34(3):187-259.

Ownbey, G.B. 1947. Monograph of the North American species of Corydalis. Ann. Missouri. Bot. Gard. 34:187-259.

Ownbey, G.B. 1951. On the cytotaxonomy of the genus Corydalis, section Eucorydalis Amer. Midl. Naturalist 45:184-186.

Ownbey, G.B. 1997. Argemone. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 3:314-322 Oxford Univ. Press, New York and Oxford.

Ownbey, M. 1950a. Natural hybridization and amphiploidy in the genus Tragopogon Amer. J. Bot. 37:487-499.

Ownbey, M. 1950b. The genus Allium in Texas. Research studies of the State College of Washington 18(4):181-222.

Ownbey, M. and H.C. Aase. 1955. Cytotaxonomic studies in Allium I the Allium canadense alliance, Res. Stud. State Coll. Wash., Monogr. Suppl. 1-106.

Ownbey, R.P. 1944. The liliaceous genus Polygonatum in North America Ann. Missouri Bot. Gard. 31:373-413.