Thysanocarpus. CRUCIFERiT:. 117 



Removed from Tlilaspidrfc on account of its incumbent cotyledons, which were 

 first detected by Sclikuhr. (handb. 2. L, 180.) 



C. Bursa-pastoris (Moench.) — DC. syst. 2. p. 383 ; Darlingt. fl. Cent. j). 

 380. Thlaspi Bursa-pastoris, Linn. ; Eng. hot. t. 1485. 



Fields and waste places. Introduced. May-Sept. — Radical leaves varia- 

 ble, sometimes entire, but usually toothed, incised or pinnatifid, narrowed 

 into a petiole at the base. Pedicels filiform, much longer than the silicles. 



38. HYMENOLOBUS. Nutt. mss. 



"Silicle ovate or elliptical, membranaceous; valves somewhat tumid, 

 slightly carinate, wingless; cells many-seeded. Stigma sessile. — Small 

 slender glabrous annuals, with divaricate stems, and more or less pinnatifidly 

 cleft or laciniated leaves. Flowers minute, white." 



Scarcely distinct from Capsella; with which it is apparently connected through 

 C. elliptica, C. A. Meyer, {pi. Cauc. p. 194. Hutchinsia procumbens, Desv. Hymen- 

 olobus procumbens, Nutt. mss.) 



1. H. divaricatus (Nutt.l mss.): "procumbent, much branched; leaves 

 short and pinnatifid, with several oblong lobes ; upper ones linear and often 

 entire ; silicle elliptical-oblong, obtuse. 



" Shady grassy plains of the Oregon, near the junction of the Wahlamet. 

 — Stems 3-4 inches long, diffusely branched. Lower leaves with about five 

 segments. Flowers very minute." — Nuttall. 



2. H. erectus (Nutt. mss.) : " stem erect, much branched ; leaves oblong, 

 somewhat pinnatifid or entire ; silicle linear-oblong. 



" With the preceding, to which it is very closely allied." Nuttall. 



3. Nucamentaceoe. 

 Tribe IX. ISATIDE^. DC. 



Silicle micamcntaceous, indehiscent, (mostly) 1-celled, 1-seeded. 

 Cotyledons incumbent, the direction various. 



39. THYSANOCARPUS. Hook. fl. Bor.-Am. 1. p. 69. t. 18. 



Silicle obovate, or nearly orbicular, much compressed, usually surrounded 

 with a broad winged margin, 1-cellcd. Seed broadly obovate, pendulous 

 from a lateral funiculus. Cotyledons roundish, compressed, parallel with the 

 valves, obliquely incumbent ; the radicle approaching near the edge. — An- 

 nuals. Flowers small, white or pale violet, racemose. Silicles pendulous, 

 on filiform pedicels. 



Allied to Tauscheria; but that genus has cymbiform silicles, with a narrow mar- 

 gin, and the apex elongated into a beak. 



