Lepidium. CRUCIFERiE. 115 



2. S. Coronopus (Poir.): leaves pinnately divided ; segments entire, tooth- 

 ed or pinnatifid ; silicles not emarginate at the apex, compressed ; valves ru- 

 gosely crested. — Poir. diet. 7. p. 76 ; DC. prodr. 1. p. 203. Cochlcaria Co- 

 ronopus, Linn. Coronopus Ruelliij Allioni ; Pursh, fi. 2. p. 435 ; Null, 

 gen. 2. p. (H. 



Road sides, Virginia to Carolina. June-Aug. Introduced. — (p and (2). 



36. LEPIDIUM. li. Br. in hort. Keic. 4. p. 85 ; DC. sysl. 2. p. 527. 



Silicle ovate or subcordate ; valves carinate or rarely ventricosc, dehiscent ; 

 cells 1-seeded. Seeds compressed, or somewhat 3-sided — Racemes terminal. 

 Flowers white. (Cotyledons accumbent in several species.) 



1. L. campeatre (R. Brown) : silicles ovate, winged, emarginate, scaly- 

 punctate ; cauline leaves sagittate, denticulate. DC. syst. 2. p. 53o. Thlas- 

 pi campestre, Linn.; Eng. hot. t. 13S5. 



Waste places, New-York ! Delaware! Introduced. June-July. — ® or 

 @ Stem and leaves minutely velvety. 



2. L. Virfrinicwn {lAnn.) : silicles nearly orbicular, wingless, emarginate ; 

 flowers diandrous (petals 4); cauline leaves linear-lanceolate, incised ; cotyle- 

 dons accuuabent.— .T/ic/i.r. .' ^. 2. p. 27; DC. prodr. 1. p. 205; Hook, fi. 

 Bor.-Am. 1. p. 69. 



Fields and road-sides, throughout the United States. June-August. — (T) 

 About a foot high, paniculately branched above. Flowers minute, rarely tn - 

 androus. 



3. L. ruderale (Linn.) : silicles broadly oval or nearly orbicular, wingless, 

 emarginate; flowers diandrous, apetalous; leaves (radical ones scarcely) in- 

 cised ; those of the branches linear, entire ; cotyledons incumbent. — Eng. 

 bot.t. 1595; DC. prodr. 1. p. 205; Hook.! fl. Bor.-Am. 1. p. 68, <^ in 

 jour. bat. p. 192. 



British America! to the Pacific! Michigan, Dr. Pitcher! St. Louis, 

 Missouri. (Hook.) — J) Leaves less deeply divided than in the European 

 plant. Very near L. Virginicum ; but easdy distinguished by the apetalous 

 flowers and incumbent cotyledons. 



4. L. Menziesii (DC): silicles orbicular, wingless, emarginate'; flowers 

 diandrous, apetalous (petals 4, Natt.) ; radical leaves bipinnatifid ; cauline and 

 branch leaves mostly pinnatifid ; the uppermost linear, entire. Hook. — DC. 

 syst. 2. p. 539; Hook. Ji. Bor.-Am. l.p. 68. 



California, Menzies, NiUtall ; N. W. Coast? Rocky Mountains, Drum- 

 mond, Nuttall.—(^ ( U DC.) Radical leaves hispid or pubescent. Hook. 



5. L. Californicum (Nutt. ! mss.) : "stem somewhat hirsutely pubescent, 

 much branched ; silicles nearly orbicular, emarginate, wingless ; flowers dian- 

 drous (petals 4) ; leaves nearly glabrous, laciniately pinnatifid." 



Near Monterey, Upper California, ]Vuttall!—{J) Segments of the leaves 

 linear. Silicles very small, slightly emarginate : style ahnost wanting. Pedi- 

 cels twice the length of the silicles. Cotyledons incumbent. 



6. L. lasiocarpvm (J^uti. I mss.): "hispidly pubescent ; silicles elliptical- 

 oval, conspicuously emarginate, wingles'i, somewhat pubescent, reticulated, 

 rather longer than the pedicels ; leaves undivided, linear-lanceolate, incisely 

 toothed ; flowers diandrous, apetalous." 



Near St. Barbara, Upper California, Niittall! — T) Silicles one-third larger 

 than in L. Virginicum; the pedicels somewhat reflexed. Cotyledous iucum- 

 bent. 



