AL-SHEHBAZ, THELYPODIEAE THE GENERA OF THELYPODIEAE (CRUCIFERAE; BRASSICACEAE) IN THE SOUTHEASTERN UNITED STATES' IHSAN A. AL-SHEHBAZ THELYPODIEAE Prantl in Engler & Prantl, Nat. Pflanzenfam. III. 2: 155. 1891. Herbaceous annuals [biennials, or perennials, very rarely shrubs], glabrousor with simple trichomes only [very rarely with furcate hairs]. Inflorescence aterminal raceme or corymb, laxly or densely flowered, often ebracteate. Sepalsequal at base (infrequently strongly saccate), erect or spreading, rarely reflexed[or sometimes forming an urceolate, flask-shaped, or slightly bilabiate calyx].Petals often differentiated into claw and blade [occasionally undifferentiatedor attenuate to a clawlike base], usually crisped or channeled. Stamens long-exserted, sometimes slightly protruding [rarely included], equal in length orslightly tetradynamous, rarely in 3 pairs of unequal length; anthers often sag-ittate at base, linear [or occasionally oblong or ovate], usually coiling circinatelyafter dehiscence; filaments not appendaged, free, or the median ones connatein pairs. Siliques dehiscent, linear, several to many times longer than broad,flattened parallel to the septum [or terete], often borne on a distinct gynophore,rarely subsessile. Styles obsolete or evident in fruit. Stigmas entire or slightly[to strongly] 2-lobed; lobes opposite the valves [or replum] in fruit. Seeds wingedor wingless, not mucilaginous when wet; cotyledons accumbent [or incumbent].Base chromosome numbers 10, 11, 12, 13, 14, 15. (Including Stanleyeae Rob-'Prepared for the Generic Flora of the Southeastern United States, a long-term project made possibleby grants from the National Science Foundation and currently supported by BSR-81 11520 (C. E.Wood, Jr., principal investigator), under which this research was done, and BSR-8303100 (N. G.Miller, principal investigator). This account, the 106th in the series, follows the format establishedin the first paper (Jour. Arnold Arb. 39: 296-346. 1958) and continued to the present. The areacovered by the Generic Flora includes North and South Carolina, Georgia, Florida, Tennessee,Alabama, Mississippi. Arkansas, and Louisiana. The descriptions are based primarily on the plantsof this area, with information about extraregional members of a family or genus in brackets [ 1. Thereference that I have not verified is marked with an asterisk. I am most indebted to Carroll Wood for his continuous guidance, help, and critical review of thepresent paper. Special appreciation is extended to Reed C. Rollins for his notes on the distributionof Warea, and to Norton G. Miller and George K. Rogers, as well as to Barbara Nimblett for thetyping of the manuscript. I am grateful to Elizabeth B. Schmidt and Stephen A. Spongberg for theireditorial advice. 2For an account of the family and its tribes, see I. A. Al-Shehbaz. The tribes of Cruciferae (Bras-sicaceae) in the southeastern United States. Jour. Arnold Arb. 65: 343-373. 1984.'c President and Fellows of Harvard College. 1985.Journal of the Arnold Arboretum 66: 95-111. January, 1985.1985]
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