COCHLBARIA, CRUCIFERiE. 109 



Plains and open grassy places, near St. Louis, Missouri ; and in Arkansas, 

 Nuttall ! Milledgeville, Georgia, Dr. Boykin ! Macon, Georgia, Mr. Loovii.i! 

 0. Arkansas, Nutlall ! March-April. — Stem often much branched,' leafy. 

 Flowers minute. Silicles about 2i lines long; valves marked with a me- 

 dian nerve, obscurely veined. Petals obovatc, very slightly emarginate. 



30. D. Caroliniana (Walt.) : stem leafy and hispid at the base, naked 

 and sniooth above ; leaves roundish-ovate, entire, hispid ; silicles linear, 

 glabrous, corymbed, longer than the pedicles ((lowers white). — Walt. Car. 

 p. 174; Ell.sk.2. p. 138; DC. proch. 1. p. 171. D. hispidula, Mich.r. ! 

 Jl.2. p. 28; Pursh.'Ji. 2. p. 433. Arabis rotundifolia, Raf. in Avier. month. 



mag. 2. p. 43. 



p. umbeUata : silicles elongated, almost umbellate. 



Sandy fields, Connecticut ! to Georgia ! west to Arkansas ! /?. Arkansas, 

 Dr. Pitcher '. April-June. — Plant 1-3 inches high. Petals oblong, twice as 

 long as the sepals. Silicles 4-6 lines long; cells 20-30-seeded : style almost 

 none. — Petals in the terminal flowers of old racemes very minute, or nearly 

 wanting. 



31. D.micrantha {^mXX. mss.) : "stem leafy and hispid below, naked 

 and smooth above ; leaves cuneate-obovate, hispid, entire ; silicles linear, mi- 

 nutely hispid, much longer than the pedicels (flowers white). 



" Open plains and rocky places about St. Louis, and in Arkansas." Nut- 

 tall. — Differs from the preceding chiefly in the hispid silicles. 



§ 2. Petals 2^arted. — Erophila, DC. 



32. D. rerna (hinn.) : scapes naked; leaves lanceolate, somewhat tooth- 

 ed; silicles elliptical. — Eng. hot.t. 586; PuTsh ! Ji. 2. p. 433. Erophila 

 Americana & vulgaris, DC. prodr. 1. p. 173. E. vulgaris, flbo/c. fl. Bor.- 

 Am. 1. p. 56. 



Fields and hill sides, Canada ! to Virginia ! March-April. — (l) Scapes 1- 

 4 inches high, filiform. Flowers minute, Avhite. Silicles on long pedicels : 

 style very short. Seeds numerous. 



24. COCHLEARIA. Tourn. ; DC. syst. 2. p. 358. 



'Silicle ovate-globose or oblong ; valves ventricose. Seeds numerous, not 

 bordered. Calyx equal, spreading. Petals 2-parted. Stamens tootliless. 

 Style short or none. — Flowers white. Leaves mostly fleshy. 



1. C. ohlongifoUa (DC.) : silicles roundish, half as long as the pedicels ; 

 cauline leaves oblong, entire (or sinuate-toothed), sessile, the uppermost 

 slightly auricled. DC. .<!yst. 2. p. 263; Hook.fi. Bo7\-Am. 1 p. 56. 



N. W. America ; Sitclia, Bongard. 



2. C. Anglica (Linn.) : silicles globose-elliptical, reticulately veined, half 

 as long as the pedicels ; radical leaves petioled, ovate, entire ; cauline ones 

 oblong. DC— Eng. hot. t. 552 ; DC. prodr. 1. p. 173 ; Hook.fi. Bor.-Am.. 

 1. p. 57. 



Arctic America and Kotzbue's Sound to Oregon. — Septum often fenes- 

 trate. Hook. 



3. C.f enestrata (R.^rovfn)'. silicles elliptical or oval; valves scarcely 

 veined ; septum elliptical-lanceolate, with the axis often fenestrate ; radical 

 leaves cordate, entire ; cauline ones oblong-spatulate, somewhat toothed. 

 R. Br. ! in Ross''s voy. and in Parry^s \st voy. app. p. 266; DC. prod?: 

 l.p. 174 ; Hook. ! fl. Bor.-Am. 1. p. 57. 



