128 CRUCIFER.E. Lcpidhim. 



Proc. Am. Acad. xvii. 322, in small part. L. V'nginlcum, Macouii, Cat. Cauad. PI. 57, as to 

 eastern plant; MacMillan, Metasp. Min. Val. 257.— Common and widely distributed, 

 extending from New England acro.ss the continent and soutli to Texas, where, as in the 

 northwest, probably indigenous ; in the Ea,stern States a wayside weed appearing as though 

 introduced. (N. & Centr. Asia, adv. in Eu.) 

 L. rudekAle, L. Kearly or quite glabrous, 8 to 12 inches high, exhaling a strong disagree- 

 able odor (like that of Senebiera didj/ma) : lowest leaves bipinnatifid, seldom persisting; 

 the upper narrow, linear, entire or few-toothed : racemes more slender and loosely flowered 

 than in the preceding: flowers small, apetalous, diandrous: capsule smooth, marginless, 

 broadly ovate rather than orbicular, commonly less than a line in diameter: pedicels slender, 

 U lines long, more scattered and less regularly spreading than in the jircccdiug. — Spec. ii. 

 f)45 ; Gray, Gen. 111. i. 168, t. 73, f. 8-10 ; Wats. & Coulter in Gray, Man. ed. 6, 73. — Waste 

 })laccs and roadsides, Nova Scotia, Macoun, to Texas, Reverchon, becoming freiiuent about 

 the larger cities of the Atlantic seaboard; fl. a little earlier than the two ])recediiig, May to 

 July. (Xat. from Eu.) Leafy and pauiculately branched specimens not differing from 

 this species in their essential characters have been collected in the Winnii>eg Valley, at 

 I'\)rt Ellis, and in the Saskatchewan region, Bouiyeaii, and at Maple (Jreck, Macoun. 

 ++ ++ Lower and more spreading, pubescent or hirsute. 

 L. lasiocarpum, Nutt. Branching from or near the base, decumbent (rarely if ever with 

 a single erect stem), hirsute with spreading hairs or tomentulose : lower leaves pinnately 

 parted; segments usually rather broad, obtuse or rounded, sparingly toothed or entire: 

 racemes several ; pedicels distinctly flattened, horizontally spreading, U lines long : sepals 

 broadly oblong, usually purple, with thin white margins : petals minute or none : capsule 

 sul)orbicular, thin-margined near the apex, hispid-pubescent upon both faces or at least upon 

 the edge (very rarely quite smooth). — Nutt. in Torr. & Gray, Fl. i. 115 ; Wats. Proc. Am. 

 Acad. xi. 113, & xvii. 322; Brew. & Wats. Bot. Calif, i. 46. L. Wrightii, Gray, PI. Wright, 

 ii. 15. L. ruderale, var. lasiocarpum, Engclm. in Gray, 1. c. — S. W. Colorado, Brandajee, 

 and Texas to S. California. (Adj. Mex.) Also introduced upon railway ballast in Oregon, 

 Henderson. A species of definite geographic distribution, distinguished from the following 

 by its almost invariably hispid pods and less deeply divided leaves. 

 L. niPixxAxfFiDUM, Desv. Low, branching from or near the base: leaves all pinnatifid, the 

 lowest bipinnatifid; segments roundish to oblong or linear: flowers apetalous: fruiting 

 pedicels divaricate, seldom exceeding the orbicular glabrous silicels. — Journ. Bot. iii. 165 

 (1814) ; K. Brandegee, Zoe, iii. 49, & iv. 300. L. Menziesii, Hook. Fl. Bor.-Am. i. 68, as to 

 descr. ; Torr. & Gray, Fl. i. 115, in part ; Brew. & Wats. Bot. Calif, i. 46. arid authors as to 

 pi. Calif., not DC. — A common weed by beaten paths, &c., Centr. and S. California, eastward 

 to Arkansas, Prinr/le, Letterman. (Probably introduced from Mex. and S. Amer.) 

 ++ ++ 4H. Stem conspicuously granular : southwestern annual or biennial. 

 L. sordidum, Gray. Spreading from the base or forming an erect flexuous much 

 l)ranched stem, a foot in height : leaves all deeply pinnatifid, 6 to 9 lines long ; segments 

 more or less cleft : racemes many, 8 to 16 lines in length : flowers very numerous, minute, 

 apetalous or nearly so : stamens 4 : capsules orbicular, smooth, wingless, three fourths line 

 in diameter, on slender ascending pedicels of about the same length. — PI. Wright, i. 10, 

 & ii. 15; Coulter, Contrib. U. S. Nat. Herb. ii. 21. — Mountain valleys and rocky hills, 

 W. Texas, Wright, Girard, Havard ; fl. in summer. (Chihuahua, Pnnf//e.) 

 -1- ^- ^- Cotyledons incumbent : fruit larger, 2 to 2^ lines long at maturity ; the thin 

 margin slightly involute toward the upper or dorsal surface : Pacific species. 

 L. nltidum, Nnxx. Erect or branched from the base and spreading, 4 inches to a foot or 

 more in height : pubescent or nearly smooth': lower leaves deejdy pinnatifid with narrow 

 rhachis and attenuate segments ; the upper leaves often entire : racemes one to several, rather 

 loosely flowered: petals white, considerably exceeding the sepals: capsule smooth and 

 shining, convex below and nearly flat or even concave above, H to 2 lines broad, often 

 purple: pedicels strongly flattened. — Nutt. in Torr. & Gray, Fl. i. 116; Benth. PI. Hartw. 

 298 ; Torr. Pacif. R. Rep. iv. 66, vii. 8, & Bot. Mex. Bound. 34 ; Brew. & Wats. Bot. Calif, 

 i. 46. L.leioairpiim, Hook. & Am. Bot. Beech. 324, not DC. — Wa.shington, Rockland, 

 S>iksdo7-f, Klikitat, Iloivell, to San Diego, California, Thur-ber, Orc.utt ; common on dry 

 hillsides; fl. through spring. 



