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Thelypodieae (Cruciferae; Brassicaceae) in the southeastern United States. J. Arnold Arbor. 66: 95–111. Al-Shehbaz, I. A. 1977. Protogyny in the Cruciferae. Syst

Lesquerella (Cruciferae) in North America. Cambridge, Mass. Rollins, R. C. and U. C. Banerjee. 1975. Atlas of the trichomes of Lesquerella (Cruciferae). Publ

in Leavenworthia (Cruciferae). Contr. Gray Herb. 195: 1–134. Lloyd, D. G. 1969. Petal color polymorphism in Leavenworthia (Cruciferae). Contr. Gray Herb

Cakile (Cruciferae). Contr. Gray Herb. 205: 3–146. Rodman, J. E. 1980. Population variation and hybridization in sea-rockets (Cakile, Cruciferae): Seed

species of Lesquerella (Cruciferae). Rhodora 57: 241–264. Rollins, R. C. and E. A. Shaw. 1973. The Genus Lesquerella (Cruciferae) in North America. Cambridge

representatives of Smelowskia (Cruciferae). Rhodora 54: 85–119. Velichkin, E. M. 1979. Smelowskia C. A. Mey. (Cruciferae). Critical review and relation

Glaucocarpum, a new genus in the Cruciferae. Madroño 4: 232–235. Rollins, R. C. 1982b. Thelypodiopsis and Schoenocrambe (Cruciferae). Contr. Gray Herb. 212: 71–102

Martínez-Laborde, J. B. 1988. Estudio Sistemático del Género Diplotaxis DC. (Cruciferae, Brassiceae). Ph.D. dissertation. Universidad Politécnica de Madrid. Mummenhoff

on American Rorippa (Cruciferae). Rhodora 63: 1–10. Stuckey, R. L. 1972. Taxonomy and distribution of the genus Rorippa (Cruciferae) in North America. Sida

taxonomic character in Dithyrea (Cruciferae). Rhodora 60: 145–152. Rollins, R. C. 1979. Dithyrea and a related genus (Cruciferae). Publ. Bussey Inst. Harvard

tribeBrassicaceae tribe Lepidieae genusLepidium speciesLepidium paysonii Rollins Cruciferae Continental N. Amer., 577. 1993. Ihsan A. Al-Shehbaz, John F. Gaskin Treatment

Al-Shehbaz, I. A. 1973. The biosystematics of the genus Thelypodium (Cruciferae). Contr. Gray Herb. 204: 3–148. Payson, E. B. 1923. A monographic study

American taxa. Rollins, R. C. 1982b. Thelypodiopsis and Schoenocrambe (Cruciferae). Contr. Gray Herb. 212: 71–102. Thelypodiopsis ambigua, Thelypodiopsis

alyssum. Arnoldia (Jamaica Plain) 26: 33–48. Dudley, T. R. 1968. Alyssum (Cruciferae) introduced in North America. Rhodora 70: 298–300. Alyssum alyssoides

nearly worldwide. Species 4 (1 in the flora). Borgen, L. 1987. Lobularia (Cruciferae). A biosystematic study with special reference to the Macaronesian region

Calder (1964). Mulligan, G. A. and J. A. Calder. 1964. The genus Subularia (Cruciferae). Rhodora 66: 127–135. Subularia aquatica window.propertiesFromHigher

and C. W. James. 1964. Nomenclatural and taxonomic corrections in Warea (Cruciferae). Rhodora 66: 18–26. Warea amplexifolia, Warea carteri, Warea cuneifolia

(1 in the flora). Fosberg, F. R. 1965. Nomenclature of the horseradish (Cruciferae). Baileya 13: 1–4. Lawrence, G. H. M. 1971. The horseradish Armoracia

Common names: Snake Range bladderpod Basionym: Lesquerella pendula Rollins Cruciferae Continental N. Amer., 647. 1993 Treatment appears in FNA Volume 7. Treatment

Bot. 1(1): 1–27. Rollins, R. C. 1982b. Thelypodiopsis and Schoenocrambe (Cruciferae). Contr. Gray Herb. 212: 71–102. Warwick, S. I., I. A. Al-Shehbaz, R.

Rhodora 50: 1–15. Harris, J. G. 1985. A Revision of the Genus Braya (Cruciferae) in North America. Ph.D. thesis. University of Alberta. Parsons, K. A

The biology and systematics of the genus Coincya Porta & Rigo ex Rouy (Cruciferae). Bot. J. Linn. Soc. 102: 313–398. Coincya monensis window.properties

genusDimorphocarpa speciesDimorphocarpa candicans (Rafinesque) Rollins Cruciferae Continental N. Amer., 361. 1993. Ihsan A. Al-Shehbaz Basionym: Iberis

names: Middle Butte bladderpod Basionym: Lesquerella obdeltata Rollins Cruciferae Continental N. Amer., 640. 1993 Treatment appears in FNA Volume 7. Treatment

known from Mexico (Coahuila). Rollins, R. C. 1959. The genus Synthlipsis (Cruciferae). Rhodora 61: 253–264. Synthlipsis greggii window.propertiesFromHighe

cultivated or abandoned fields. Rollins, R. C. 1947. Generic revisions in the Cruciferae: Sibara. Contr. Gray Herb. 165: 133–143. Planodes virginicum window.p

The genetics of self-incompatibility in Leavenworthia crassa Rollins (Cruciferae). Genetica 38: 227–242. Lyons, E. E. and J. Antonovics. 1991. Breeding

Watson) Rollins (Guanajuato). Rollins, R. C. 1947. Generic revisions in the Cruciferae: Sibara. Contr. Gray Herb. 165: 133–143. Sibara deserti, Sibara filifolia

synonymy with Nerisyrenia. Bacon, J. D. 1978. Taxonomy of Nerisyrenia (Cruciferae). Rhodora 80: 159–227. Nerisyrenia camporum, Nerisyrenia linearifolia

2 (2 in the flora). Rollins, R. C. 1979. Dithyrea and a related genus (Cruciferae). Publ. Bussey Inst. Harvard Univ. 1979: 3–32. Dithyrea californica, Dithyrea

species. Lichvar, R. W. 1983. Evaluation of varieties in Stanleya pinnata (Cruciferae). Great Basin Naturalist 43: 684–686. Stanleya pinnata var. integrifolia

speciesErysimum capitatum varietyErysimum capitatum var. purshii (Durand) Rollins Cruciferae Continental N. Amer., 482. 1993. Ihsan A. Al-Shehbaz Basionym: Erysimum

Al-Shehbaz, Michael D. Windham Basionym: Arabis pallidifolia Rollins Cruciferae Continental N. Amer., 181. 1993 Synonyms: Arabis thompsonii S. L. Welsh

Syst. Evol. 224: 213–234. Harriman, N. A. 1965. The Genus Dentaria L. (Cruciferae) in Eastern North America. Ph.D. dissertation. Vanderbilt University.

Bailey et al. (2002, 2007). Rollins, R. C. 1943. Generic revisions in the Cruciferae: Halimolobos. Contr. Dudley Herb. 3: 241–265. Halimolobos diffusa, Halimolobos

V. P. 1972. On Parrya R. Br., Neuroloma Andrz. and some other genera (Cruciferae). Bot. Zhurn. (Moscow & Leningrad) 57: 664–673. Parrya arctica, Parrya

Harvard Pap. Bot. 8: 173–202. Rollins, R. C. 1980b. The genus Pennellia (Cruciferae) in North America. Contr. Gray Herb. 210: 5–21. Pennellia longifolia,

reconsideration of Cardamine curvisiliqua and C. gambellii as species of Rorippa (Cruciferae). J. Arnold Arbor. 69: 65–71. Shehbaz, I. A. and R. A. Price. 1998. Delimitation

genus Strigosella Boiss. and its relation to the genus Malcolmia R. Br. (Cruciferae). Bot. Zhurn. (Moscow & Leningrad) 57: 1033–1046. Strigosella africana

Baillargeon, G. 1986. Eine taxonomische Revision der Gattung Sinapis (Cruciferae: Brassiceae). Doctoral thesis. Freie Universität Berlin. Sinapis alba

dissertation. Stanford University. Rossbach, G. B. 1958. The genus Erysimum (Cruciferae) in North America north of Mexico—A key to the species and varieties.

thorild-wulffii. Harris, J. G. 2006. Pilose braya, Braya pilosa Hooker (Cruciferae; Brassicaceae), an enigmatic endemic of arctic Canada. Canad. Field-Naturalist

drabas of North America. Amer. J. Bot. 4: 253–267. Schulz, O. E. 1927. Cruciferae—Draba, Erophila. In: H. G. A. Engler, ed. 1900–1953. Das Pflanzenreich…