Bibiography:  Author Listing
Author group 'R'

R. A. Klips and A. A. Snow 1997. Delayed autonomous self-pollination in Hibiscus laevis (Malvaceae) Am. J. Bot. 84: 48

Rabe, E.W. and M.W. Windham. 1993. Cheilanthes. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 2:152-169 Oxford Univ. Press, New York and Oxford.

Rabeler, R. K. 1985. Petrorhagia (Caryophyllaceae) of North America. Sida 11(1):6-44.

Rabeler, R. K. 1992. A new combination in Minuartia (Caryophyllaceae). Sida 15(1):95-96.

Rabeler, R. K. and A. A. Reznicek. 1997. Cerastium pumlium and Stellaria pallida (Caryophyllaceae) new to Texas. Sida 17(4): 843-845.

Rabeler, R. K. and J. W. Thieret. 1988. Comments on the Caryophyllaceae of the southeastern United States. Sida 13(2):149-156.

Rabeler, R.K. 1988. Eurasian introductions to the Michigan flora. IV. Two additional species of Caryophyllaceae in Michigan Michigan Bot. 27:85-88.

Radford, A. E., H. E. Ahles, and C. R. Bell. 1968. Manual of the Vascular Flora of the Carolinas. The University of North Carolina Press, Chapel Hill.

Radford, A.E., W.C. Dickison, J.R. Massey, and C.R. Bell. 1974. Vascular plant systematics Harper and Row Publishers, New York.

Rahn, K. 1974. Plantago section Virginica, a taxonomic revision of a group of American plantains, using experimental, taximetric and classical methods Dansk Bot. Ark. 30:1-178.

Rajhathy, T. and H. Thomas. 1974. Cytogenetics of Oats (AvenaD1707 L.). Miscellaneous publications of the Genetics Society of Canada No. 2. Ottawa, Ontario.

Ralphs, M.H. 1992. Ecology, control, and grazing management of locoweeds in the western U.S. In: L.F. James, R.F. Keeler, E.M. Bailey, Jr., P.R. Cheeke, and M.P. Hegarty Poisonous plants: Proceedings of the third international symposium Pp. 528-533, Iowa State Univ. Press, Ames.

Ralston, B. E. and R. A. Hilsenbeck. 1989. Taxonomy of the Opuntia schottii complex (Cactaceae) in Texas. Madroño 36:221-231.

Ralston, B. E. and R. A. Hilsenbeck. 1992. Opuntia densipina (Cactaceae). A new club cholla from the Big Bend Region of Texas. Madroño 39: 281-284.

Ramamoorthy, T. P. and B. L. Turner. 1992. Nomaphila stricta (Acanthaceae), a newly discerned aquatic weed in Texas, and the first report for North America. Sida 15(1):115-117.

Ramamoorthy, T.P. and E.M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae) Monogr. Syst. Bot. Missouri Bot. Gard. 19:1-120.

Randall, J.B., L. Hufford, and D.E. Soltis. 1996. Phylogenetic relationships in Sarraceniaceae based on rbcL and ITS sequences Syst. Bot. 21:121-134.

Randall, J.M. 1997. Defining weeds of natural areas. In: J.O. Luken and J.W. Thieret, eds Assessment and management of plant invasions, Springer-Verlag, New York.

Ranker, T.A. and A.F. Schnabel. 1986. Allozymic and morphological evidence for a progenitor-derivative species pair in Camassia (Liliaceae) Syst. Bot. 11:433-445.

Rasmussen, F.N. 1985. Orchids. In: R.M.T. Dahlgren, H.T. Clifford, and P.F. Yeo 1985, The families of the monocotyledons Pp. 249-274, Springer-Verlag, Berlin, Heidelberg.

Raven, P. H. and D. P. Gregory. 1972a. A revision of the genus Gaura (Onagraceae). Memoirs of the Torrey Botanical Club 23:1-96.

Raven, P. H. and D. R. Parnell. 1970. Two new species and some nomenclatural changes in Oenothera subgenus Hartmannia (Onagraceae). Madroño 20:146-149.

Raven, P.H. 1963. The old world species of Ludwigia (including Jussiaea), with a synopsis of the genus (Onagraceae) Reinwardtia 6:327-427.

Raven, P.H. 1964. The generic subdivision of Onagraceae, tribe Onagreae Brittonia 16:276-288.

Raven, P.H. and D.I. Axelrod. 1974. Angiosperm phylogeny and past continental movements Ann. Missouri Bot. Gard. 61:539-673.

Raven, P.H. and D.P. Gregory. 1972b. Observations of meiotic chromosomes in Gaura (Onagraceae) Brittonia 24:71-86.

Raven, P.H., R.F. Evert, and S.E. Eichhorn. 1986. Biology of plants, 4th ed Worth Publishers, Inc., New York.

Raven, P.H., W. Deitrich, and W. Stubbe. 1979. An outline of the systematics of Oenothera subsect. Euoenothera (Onagraceae) Syst. Bot. 4:242-252.

Ray, Jr., J. D. 1956. The genus Lysimachia in the New World. Illinois Biological Monographs: Vol. XXIV, Nos. 3-4.The University of Illinois Press, Urbana.

Ray, M.F. 1987. Soliva (Asteraceae: Anthemideae) in California Madroño 34:228-239.

Ray, M.F. 1995. Systematics of Lavatera and Malva (Malvaceae, Malveae)--a new perspective Pl. Syst. Evol. 198:29-53.

Ray, P.M. and H.F. Chisaki. 1957a. Studies on Amsinckia I, A synopsis of the genus, with a study of heterostyly in it, Amer. J. Bot. 44:529-536.

Ray, P.M. and H.F. Chisaki. 1957b. Studies on Amsinckia. II Relationships among the primitive species, Amer. J. Bot. 44:537-544.

Ray, P.M. and H.F. Chisaki. 1957c. Studies on Amsinckia III, Aneuploid diversification in the Muricatae, Amer. J. Bot. 44:545-554.

Raynal, J. 1976a. Notes Cyperologiques: 26. Le Genre Schoenoplectus. II. L'amphicarpie et la sect. Supini. Adansonia, series 2, 16:119-155.

Raynal, J. 1976b. Notes Cyperologiques: 27. Identification de deux Scleria de Poiret. Adansonia, series 2, 16:211-217.

Rechinger, K.H., Jr. 1937. The North American species of Rumex Field Mus. Nat. Hist., Bot. Ser. 17:1-151.

Redmann, R.E. 1985. Adaptation of grasses to water stress--leaf rolling and stomate distribution Ann. Missouri Bot. Gard. 72:833-842.

Reed, C. F. 1965. Isoëtes in southeastern United States. Phytologia 12:369-400.

Reed, C. F. 1968. The nomenclature and synonymy of the Amaranthaceae, Chenopodiaceae and Nyctaginaceae of the flora of Texas. Phytologia 18(1):1-43.

Reed, C. F. 1969a. Chenopodiaceae. Flora of Texas, Vol. 2, part I. Texas Research Foundation. Renner, TX.

Reed, C. F. 1969b. Amaranthaceae. Flora of Texas, Vol. 2, part I. Texas Research Foundation. Renner, TX.

Reed, C. F. 1969c. Nyctaginaceae. Flora of Texas, Vol. 2, part I. Texas Research Founcation. Renner, TX.

Reed, C. F. 1981. Cypripedium kentuckiense Reed, a new species of orchid in Kentucky. Phytologia 48:426-428.

Reed, C. F. 1989. New combinations required for the flora of Central eastern United States. III. Phytologia 67(6):451-453.

Reed, C. F. 1996. New combinations for the flora of the Central eastern United States. Phytologia 80(4):284. Note: this volume is marked April 1996 but was not published until December 1996.

Reed, C.F. 1977. History and distribution of Eurasian watermilfoil in the United States and Canada Phytologia 38:417-434.

Reed, Jr., P. B. 1988. National list of plant species that occur in wetlands: South Plains (Region 6). Biological Report 88(26.6). United States Fish and Wildlife Service, St. Petersburg, FL.

Reed, M. D. 1997. Manual of the dicot flora of Brazos and surrounding counties. Master's Thesis. Texas A&M University, College Station.

Reed, M. D. and M. Ketchersid. 1998. Lycianthes asarifolia (Solanaceae) new and weedy in Texas. Sida 18(1): 361-362.

Reeder, C. G. 1985. The genus Lycurus (Gramineae) in North America. Phytologia 57(4):283-291.

Reeder, J. R. 1986. Another look at Eragrostis tephrosanthes (Gramineae). Phytologia 60(2):153-154.

Reeder, J. R. and C. G. Reeder. 1980. Systematics of Bouteloua breviseta and B. ramosa (Gramineae). Systematic Botany 5(3):312-321.

Reeder, J. R. and C. G. Reeder. 1988. Hilaria annua (Gramineae), a new species from México. Madroño 35(1):6-9.

Reeder, J. R. and L. J. Toulin. 1987. Scleropogon (Gramineae), a monotypic genus with disjunct distribution. Phytologia 62:267-275.

Reeder, J. R. and L. J. Toulin. 1989. Notes on Pappophorum (Gramineae: Pappophoreae). Systematic Botany 14:349-358.

Reese, G. 1967. Cytologische and taxonomische Untersuchungen an Zannichellia palustris L Biol. Zentralbl. 86(Suppl.):277-306.

Reeves, P.A. and R.G. Olmstead. 1993. Polyphyly of the Scrophulariaceae and origin of the aquatic Callitrichaceae inferred from chloroplast DNA sequences Amer. J. Bot. 80:174.

Reeves, R. G. 1972. Flora of Central Texas. Grant Davis, Incorporated, Dallas, TX.

Reeves, R. G. 1977. Flora of Central Texas. (Revised) Grant Davis, Incorporated, Dallas, TX.

Reeves, R. G., and D. C. Bain. 1947. Flora of South Central Texas. The Exchange Store, Texas A&M University, College Station.

Reeves, T. 1979. A monograph of the fern genus Cheilanthes subgenus Physapteris (Adiantaceae). Ph.D. Disseration. Arizona State University, Tempe.

Rehder, A. 1903. Synopsis of the genus Lonicera Rep. (Annual) Missouri Bot. Gard. 14:27-232.

Rehder, A. 1920. The American and Asiatic species of Sassafras J. Arnold Arbor. 1:242-245.

Reinert, G.W. and R.K. Godfrey. 1962. Reappraisal of Utricularia inflata and U. radiata (Lentibulariaceae) Amer. J. Bot. 49:213-220.

Reiseberg, L.H., S.M. Breckstrom-sternberg, A. Liston, and D.M. Arias. 1991. Phylogenetic and systematic inferences from chloroplast isozyme variation in Helianthus sect. Helianthus (Asteraceae) Syst. Bot. 16:50-76.

Reisfield, A.S. 1995. Central Texas plant ecology and oak wilt. In: D.N. Appel and R.F. Billings, eds Oak wilt perspectives: The proceedings of the national oak wilt symposium Pp. 133-138, Information Development, Inc., Houston, TX.

Rejm?nek, M. and J.M. Randall. 1994. Invasive alien plants in California: 1993 summary and comparison with other areas in North America Madroño 41:161-177.

Renfro, H.B., D.E. Feray, and P.B. King. 1973. Geological highway map of Texas American Association of Petroleum Geologists, Tulsa, OK.

Renvoize, S. A. 1978. Studies in Elionurus (Gramineae). Kew Bulletin 32(3):665-672.

Rettig, J. H. 1988. A biosystematic study of the Carex pensylvanica group (section Acrosystis) in North America. Ph.D. Disseration. University of Georgia, Athens.

Rettig, J. H. 1989. Nomenclatural changes in the Carex pensylvanica group (section Acrocystis, Cyperaceae) of North America. Sida 13(4):449-452.

Rettig, J. H. 1990. Correct names for the varieties of Carex albicans-C. emmonsii. Sida 14(1):132-133.

Reveal, J. L. 1968. Notes on the Texas Eriogonums (Polygonaceae). Sida 3:195-205.

Reveal, J. L. 1990. The neotypification of Lemna minuta Humb., Bonpl. & Kunth, an earlier name for Lemna minuscula Herter (Lemnaceae). Taxon 39:328-330.

Reveal, J. L. 1993. On the valid publication of Collinsia violacea Nuttall (Scrophulariaceae). Phytologia 74(3):190-192.

Reveal, J. L. and C. S. Keener. 1981. Virgula Raf., and earlier name for Lasallea Greene (Asteraceae). Taxon 30:648-651.

Reveal, J. L. and M. C. Johnston. 1989. A new combination in Phoradendron (Viscaceae). Taxon 38(1):107-108.

Reveal, J. L. and N. H. Holmgren. 1972. Ceratoides, an older generic name for Eurotia. Taxon 21:209.

Reveal, J. L. and R. M. King. 1973. Re-establishment of Acourtia D. Don (Asteraceae). Phytologia 27:228-232.

Reveal, J.L. 1989. The eriogonoid flora of California (Polygonaceae, Eriogonoideae) Phytologia 66:295-414.

Reveal, J.L. 1990b. Minor new combinations in Toxicodendron (Anacardiaceae) Phytologia 69:275.

Reveal, J.L. 1993a. A splitter's guide to the higher taxa of the flowering plants (Magnoliophyta) generally arranged to follow the sequence proposed by Thorne (1992) with certain modifications Phytologia 74:203-263.

Reveal, J.L. 1993b. Flowering plant families: An overview. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 1:294-298 Oxford Univ. Press, New York and Oxford.

Reverchon, J. 1879. Flora of Dallas County, Texas Bot. Gaz. (Crawfordsville) 4:210-211.

Reverchon, J. 1880. Notes on some introduced plants in Dallas County, Texas Bot. Gaz. (Crawfordsville) 5:10.

Reverchon, J. 1903. Fern flora of Texas. Fern Bulletin 2:33-38.

Reznicek, A. A. 1990. Evolution in sedges (Carex: Cyperaceae). Canadian Journal of Botany 68:1409-1432.

Reznicek, A. A. and M. S. González-Elizondo. 1995. The Carex lurida group (Cyperaceae) in the Neotropics. Contributions from the University Michigan Herbarium 20: 217-230.

Reznicek, A. A. and P. E. Rothrock. 1997. Carex molestiformis (Cyperaceae), a new species of section Ovales from the Ozark Mountain Region. Contributions of the University of Michigan Herbarium 21:299-308.

Reznicek, A. A. and P. W. Ball. 1980. The taxonomy of Carex section Stellulatae in North America north of México. Contributions from the University Michigan Herbarium 14:153-203.

Reznicek, A. A. and R. F. C. Naczi. 1993. Taxonomic status, ecology, and distribution of Carex hyalina (Cyperaceae). Contributions from the University Michigan Herbarium 19:141-147.

Reznicek, A.A. and R.S.W. Bobbette. 1976. The taxonomy of Potamogeton subsection Hybridi in North America Rhodora 78:650-673.

Rhodes, A.M., W.P. Bemis, T.W. Whitaker, and S.G. Carmer. 1968. A numerical taxonomic study of Cucurbita Brittonia 20:251-266.

Rhodes, D.G. 1997. Menispermaceae. In: Flora of North America Editorial Committee, eds, Fl. North Amer. 3:295-299 Oxford Univ. Press, New York and Oxford.

Richards, E. L. 1968. A monograph of the genus Ratibida. Rhodora 70:348-393.

Richardson, A. 1976. Reinstatement of the genus Tiquilia (Boraginaceae: Ehretioideae) and descriptions of four new species. Sida 6:235-240.

Richardson, A. 1977. Monograph of the genus Tiquilia (Coldenia, sensu lato), Boraginaceae: Ehretioideae. Rhodora 79:467-572.

Richardson, A. 1990. Plants of Southernmost Texas. Gorgas Science Foundation, Incorporated. Brownsville, TX.

Richardson, A. 1995. Plants of the Rio Grande Delta. University of Texas Press, Austin, TX.

Richardson, C.W. 1993. Disappearing land: Erosion in the Blacklands. In: M.R. Sharpless and J.C. Yelderman, eds The Texas Blackland Prairie, land, history, and culture Pp. 262-270, Baylor Univ. Program for Regional Studies, Waco, TX.

Richardson, J.W. 1968. The genus Euphorbia of the high plains and prairie plains of Kansas, Nebraska, South and North Dakota Univ. Kansas Sci. Bull, 48:45-112.

Rick, C.M. and M. Holle. 1990. Andean Lycopersicon esculentum var. cerasiforme: Genetic variation and its evolutionary significance Econ. Bot. 44 (Suppl.):69-78.

Rickett, H. W. 1969. Wildflowers of the United States: Vol. 3: parts 1 and 2: Texas. Macgraw-Hill Book Company, New York.

Rickett, H.W. 1945a. Cornaceae N. Amer. Fl. 28b:299-311.

Rickett, H.W. 1945b. Nyssaceae N. Amer. Fl. 28b:213-216.

Ridley, M. 1996. Evolution Blackwell Science, Cambridge, MA.

Ridsdale, C.E. 1976. A revision of the tribe Cephalantheae (Rubiaceae) Blumea 23:177-188.

Rieseberg, L.H. 1991. Homoploid reticulate evolution in Helianthus (Asteraceae): Evidence from ribosomal genes Amer. J. Bot. 78:1218-1237.

Rieseberg, L.H. and G.J. Seiler. 1990. Molecular evidence and the origin and development of the domesticated sunflower (Helianthus annus, Asteraceae) Econ. Bot. 44 (Suppl.):79-91.

Riggins, R. 1977. A biosystematic study of the Sporobolus asper complex (Gramineae). Iowa State Journal of Research 51:287-321.

Riggins, R., S.M. Beckstrom-sternberg, A. Liston, and D.M. Arias. 1991. Phylogenetic and systematic inferences from chloroplast DNA and isosyme variation in Helianthus sect. Helianthus (Asteraceae) Syst. Bot. 16:50-76.

Riley, D; Batal, D; Wolff, D 2001. Resistance in glabrous-type Cucumis melo L. to whiteflies (homoptera: aleyrodidae) Journal of Entomological Science, 36 (1) pp. 46-56, 2001

Riskind, D. H. 1978. Noteworthy vascular plant records from Texas. Sida 7(4):394-396.

Riskind, D.O. and D.D. Diamond. 1988. An introduction to environments and vegetation. In: B.B. Amos and F.R. Gehlbach, eds Edwards Plateau vegetation: Plant ecological studies in central Texas Pp.1-15, Baylor Univ. Press, Waco, TX.

Riskind, D.O. and O.B. Collins. 1975. The Blackland Prairie of Texas: Conservation of representative climax remnants. In: M.K. Wali Prairie: A multiple view Pp. 361-367, The Univ. of North Dakota Press, Grand Forks.

Rivas, M. 1994. Seeking an antidote: Officials hope to learn prevalence of jimson weed abuse, avert new tragedy Dallas Morning News, 28 August, p. 47-49A.

Roach, A. W. and B. B. Harris. 1952. Sand hill ferns of Henderson County, Texas. American Fern Journal 42:13-15.

Robbins, G.T. 1944. North American species of Androsace Amer. Midl. Naturalist 32:137-163.

Roberts, R. P. 1996. The Euphorbiaceae of Texas. Master's Thesis. Southwest Texas State University. San Marcos.

Robertson, K. R. 1972. The Malpighiaceae in the southeastern United States. Journal of the Arnold Arboretum 53:101-112.

Robertson, K. R. 1974. The genera of Rosaceae in the southeastern United States. Journal of the Arnold Arboretum 55:303-332; 344-401; 611-662.

Robertson, K. R. 1981. The genera of Amaranthaceae in the southeastern United States. Journal of the Arnold Arboretum 62(3):267-314.

Robertson, K.R. 1966. The genus Erythronium (Liliaceae) in Kansas Ann. Missouri Bot. Gard. 53:197-204.

Robertson, K.R. 1971. The Linaceae in the southeastern United States J. Arnold Arbor. 52:649-655.

Robertson, K.R. 1973. The Krameriaceae in the southeastern United States J. Arnold Arbor. 54:322-327.

Robertson, K.R. 1975. The Oxalidaceae in the southeastern United States J. Arnold Arbor. 56:223-239.

Robertson, K.R. and Y.-T. Lee. 1976. The genera of Caesalpinioideae (Leguminosae) in the southeastern United States J. Arnold Arbor. 57:1-53.

Robertson, K.R., J.B. Phipps, J.R. Rohrer, and P.G. Smith. 1991. A synopsis of genera in Maloideae (Rosaceae) Syst. Bot. 16:376-394.

Robinson, B.L. 1917. A monograph of the genus Brickellia Mem. Gray Herb. 1:1-151.

Robinson, B.L. and J.M. Greenman. 1899. Synopsis of the genus Verbesina, with an analytical key to the species Proc. Amer. Acad. Arts 34:534-566.

Robinson, E. A. 1964. Notes on Scleria. III. Scleria hirtella Sw. and some allied species: a transatlantic group. Kirkia 4:175-184.

Robinson, H. 1974. Studies in Senecioneae (Asteraceae). VI. The genus Arnoglossum. Phytologia 28(3):294-295.

Robinson, H. 1977. Studies in the Heliantheae (Asteraceae). VIII. Notes on genus and species limits in the genus Viguiera Phytologia 36:201-215.

Robinson, H. 1978. Re-establishment of the genus Smallanthus Phytologia 39:47-52.

Robinson, H. and J. Cuatrecasas. 1973. The generic limits of Pluchea and Tessaria (Inuleae, Asteraceae). Phytologia 27:277-285.

Robinson, H. and J. Cuatrecasas. 1992. Thelechitonia Cuatrecasas, an older name for Complaya Strother (Eliptinae-Heliantheae-Asteraceae). Phytologia 72(2):141-143.

Robinson, H. and R. D. Brettell. 1973. Studies in the Senecioneae (Asteraceae) IV. The genera Mesadenia, Syneilesis, Miracalia, Koyamacalia, and Sinacalia. Phytologia 27:265-276.

Robinson, H. and R.M. King. 1985. Comments on the generic concepts in the Eupatorieae Taxon 34:11-16.

Robson, N. K. B. 1980. The Linnean species of Ascyrum (Guttiferae). Taxon 29:267-274.

Rock, H. F. 1957. A revision of the vernal species of Helenium. Rhodora 59:73-116; 128-158; 168-178; 203-216.

Rodman, J. E. 1974. Systematics and evolution of the genus Cakile (Cruciferae). Contributions from the Asa Gray Herbarium of Harvard University 205:3-146.

Rodman, J.E. 1990. Centrospermae revisited, part 1 Taxon 39:383-393.

Rodman, J.E., M.K. Oliver, R.R. Nakamura, J.U. McClammer, Jr., and A.H. Bledsoe. 1984. A taxonomic analysis and revisited classification of Centrospermae Syst. Bot. 9:297-323.

Rodriguez, S. A. and A. Gomez-Pompa. 1976. Variability in Ambrosia cumanensis (Compositae). Systematic Botany 1:363-372.

Roemer, F. 1849. Texas with particular reference to German immigration and the physical appearance of the country Translated from the German by O. Mueller, Standard Printing Company, San Antonio, TX, Reprinted 1983 by the German-Texan Heritage Society, Texian Press, Waco, TX.

Rogers, C. M. 1966. Yellow-flowered species of Linum in Central America and western North America. Brittonia 20:107-135.

Rogers, C. M. 1979. A new species of Linum from southern Texas and adjacent México. Sida 8:181-187.

Rogers, C. M. 1981. Linaceae. North American Flora. II. 12:1-58.

Rogers, C.E., T.E. Thompson, and G.J. Seiler. 1982. Sunflower species of the United States National Sunflower Association, Bismarck, ND.

Rogers, C.M. 1963. Studies in Linum: L. imbricatum and L. hudsonioides. Rhodora 65:51-55.

Rogers, C.M. 1964. Yellow-flowered Linum (Linaceae) in Texas Sida 1:328-336.

Rogers, D. J., and S. G. Appan. 1973. Flora Neotropica. Manihot and Manihotoides (Euphorbiaceae). Monograph No. 13. Hafner Press, New York.

Rogers, D.G. 1951. A revision of Stillingia in the New World Ann. Missouri Bot. Gard, 38:207-259.

Rogers, G. K. 1983. The genera of Alismataceae in the southeastern United States. Journal of the Arnold Arboretum 64(3):383-420.

Rogers, G. K. 1984. The Zingiberales (Cannaceae, Marantaceae, and Zingiberaceae) in the southeastern United States. Journal of the Arnold Arboretum 65(1):5-55.

Rogers, G. K. 1985. The genera of Phytolaccaceae in the southeastern United States. Journal of the Arnold Arboretum 66(1):1-37.

Rogers, G. K. 1986. The genera of Loganiaceae in the southeastern United States. Journal of the Arnold Arboretum 67(2):143-185.

Rogers, G. K. 1987. The genera of Cinchonoideae (Rubiaceae) in the southeastern United States. Journal of the Arnold Arboretum 68(2):137-183.

Rogers, H.J. 1949. The genus Galactia in the United States Ph.D. dissertation, Duke Univ., Durham, NC.

Rohwer, J.G. 1993a. Lauraceae. IN: K. Kubitzki, J.C. Rohwer, and V. Bittrich, eds The families and genera of vascular plants, Vol. II Pp. 366-391, Springer-Verlag, Berlin.

Rohwer, J.G. 1993b. Phytolaccaceae. In: K. Kubitzki, J.C. Rohwer, and V. Bittrich, eds The families and genera of vascular plants, Vol. II Pp. 506-515, Springer-Verlag, Berlin.

Rohwer, J.G. and C.C. Berg. 1993. Moraceae. In: K. Kubitzki, J.C. Rohwer, and V. Bittrich, eds The families and genera of vascular plants, Vol. II Pp. 438-453, Springer-Verlag, Berlin.

Rolfsmeier, S.B. 1995. Keys and distributional maps for Nebraska Cyperaceae, Part 1: Bulbostylis, Cyperus, Dulichium, Eleocharis, Eriophorum, Fimbristylis, Fuirena, Lipocarpha, and Scirpus Trans. Nebraska Acad. Sci. 22:27-42.

Rollins, R. C. 1942. A systematic study of Iodanthus. Contributions from the Dudley Herbarium of Stanford University 3:209-215.

Rollins, R. C. 1955. The auriculate-leaved species of Lesquerella. Rhodora 5:241-264.

Rollins, R. C. 1957. Miscellaneous Cruciferae of México and western Texas. Rhodora 59:61-71.

Rollins, R. C. 1959. The genus Synthlipsis. Rhodora 61:253-264.

Rollins, R. C. 1974. Systematic and evolutionary study of the genus Cakile. Contributions from the Asa Gray Herbarium of Harvard University 205:1-146.

Rollins, R. C. 1979. Dithyrea and a related genus (Cruciferae). Published by The Bussey Institute of Harvard University 3-32.

Rollins, R. C. 1980. The genus Pennelia (Cruciferae) in North America. Contributions from the Asa Gray Herbarium of Harvard University 210:5-21.

Rollins, R. C. 1981. Weeds of the Cruciferae (Brassicaceae) in North America. Journal of the Arnold Arboretum 62:517-540.

Rollins, R. C. 1982. Thelepodiopsis and Schoenocrambe (Cruciferae). Contributions from the Asa Gray Herbarium of Harvard University 212:71-102.

Rollins, R. C. 1993. The Cruciferae of Continental North America. Stanford University Press, Stanford, CA.

Rollins, R. C. and E. A. Shaw. 1973. The genus Lesquerella (Cruciferae) in North America. Harvard University Press, Cambridge, MA.

Rollins, R.C. 1941. A monographic study of Arabis in western North America Rhodora 43:289-325, 348-411, 425-481.

Rollins, R.C. 1947. Generic revisions in the Cruciferae: Sibera Contr, Gray Herb. 165:133-143.

Rollins, R.C. 1950. The guayule rubber plant and its relatives Contr. Gray Herb. 172:1-73.

Rollins, R.C. 1956. On the identity of Lesquerella angustifolia Rhodora 58:199-202.

Rollins, R.C. and R.C. Foster. 1957. Studies in Sida (Malvaceae) A review of the genus and monograph of the sections Malacroideae, Physalodes, Pseudomalvastrum, Incanifolia, Oligandrae, Pseudonapaea, Hookeria, and S, Contr. Gray Herb. 180:5-87.

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