Lepidlum. . CRUCIFERiE. 127 



XV. p. xiii. [Hist, et Descr. Bayonne, ed. 2, 454]. Ch/peola Caroliniana, Walt. Car. 173. 

 Cynocardamum Virginicum, Webb & Berth. Hist. Nat. Cauar. i. 97. Thlaspi Virginiunum, 

 Poir. Diet. vii. 544. Dilepticum diffusum & D. prcecox, Eaf . El. Ludov. 85, 86. — A common 

 weed iu dry soil of roadsides and cultivated grouud. New England to Elorida, westward to 

 Kansas and Texas. (W. Ind., also introduced into Europe.) The position of the cotyle- 

 dons is exceptional in the genus, and forms by far the best distinction between this and tlie 

 two following species, which in many respects closely similate it. 



J^-. -t^ Cotyledons incumbent ( parallel to the dissepiment of the capsule) ; mature fruit 



seldom exceeding H lines in length. 

 ++ Erect annuals with stem simple below : the first species more or less pubescent, the 



others nearly or quite glabrous, if granular very minutely so. 



= Petals present, white, equalling or exceding the sepals : western. 



L. Menziesii, DC. Root long, slender, perpendicular, simple or at length branched, some- 

 times biennial or perennial (?) : stem 2 inches to a foot high, puberulent, simple below, 

 erect, branched above : basal leaves piunately parted, petiolate, pubescent or somewhat 

 hirsute ; segments lanceolate, acntish, subentire or rather deeply toothed ; cauline leaves 

 merely toothed, the upper linear, entire : racemes 1 to several, not contracted near the sum. 

 mit ; pedicels slender, early spreading or divaricate, longer than the capsules : stamens 

 varying from 2 to 4 : capsules orbicular, retuse, glabrous, about a line and a half in diameter : 

 seeds narrowly margined upon one edge. — Syst. ii. 5.39; Torr. & Gray, Fl. i. 115, in part; 

 Torr. Bot. Wilkes Exped. 233 ; Macoun, Cat. Canad. PI. 57 ; not Hook., nor Brew. & Wats., 

 nor of authors as to apetalous Californian plant. 1 L. Callforntcum, Nutt. iu Torr. & Gray, 

 1. c. L. intermedium, & L. Virginicum, Brew. & Wats. Bot. Calif, i. 4G, not 47. L. occidentale, 

 Howell, Erythea, iii. 32, has no distinguishing character. — Cliffs and rocky banks, Oregon, 

 Howell, to Vancouver, Macoun, first coll. by Menzies. Of the identity of the type, there can 

 be no doubt, from De Candolle's accurate description, as well as from a tracing of and notes 

 upon the original in herb. Brit. Mus. Plants appear, however, to have been early cultivated 

 at Geneva as L. Menziesii, which, being quite distinct, have led to a general confusion. 



L. medium, Greene. Very similar to the preceding in flowers and fruit : root shorter, 

 more often branched, probably only of annual duration: stem usually taller, becoming \h 

 feet high : leaves lanceolate, dentate, but scarcely ever piunatifid, nearly or quite glabrous ; 

 the rameal linear, entire. — Erythea, iii. 32. L. intermedium, Gray, PI. Wright, ii. 15 ; Wats. 

 Bot. King Exp. 25, in part ; not A. Rich., nor Gray, Man. ed. 2-6, nor of authors as to plant of 

 Eastern States. L. lusiocarpum, var. tenuipes, Wats. Proc. Am. Acad. xvii. 322, in great part 

 (a form with slightly flattened pedicels connecting this with L. Ictsiocarpum). — Texas 

 and New Mexico to S. California and northward to Puget Sound and N. Idaho. (Mex.) 

 Perhaps intergradiiig with the preceding, but of very different and much more extended 

 range. 



Var. pubescens, Robinson, n. var. Somewhat stouter, velvety-pubescent: leaves 

 thickish : petals in type of the variety and specimens seen always present as in typical 

 form: capsule a little larger, glabrous. — L. intermedium, var. pubescens, Greene, Bot. Gaz. 

 V. 157. — Arizona, Palmer, 1876, and New Mexico, at Mangos Springs, Greene, 1880. 



L. apetalum., Willd. Habit of L. Virginicum but more slender, odorless : leaves somewhat 

 narrower and paler duller green ; the basal more or less incisely toothed or pinnatifid ; seg- 

 ments usually acntish: flowers apetalous (minute petals present in some foreign varieties), 

 diandrous, closely aggregated, the pedicels remaining nearly erect during anthesis, thus 

 making the racemes appear contracted just below the summit : fruiting pedicels approxi- 

 mate, regularly and widely spreading, scarcely longer tlian tlie glabrous orbicular retuse 

 silicels. — Spec. iii. 439. (poorly described from a fragmentary Siberian specimen, but 

 type still extant and identified by Prof. Ascherson, Verb. Bot. Brandenburg, 1891, 108). 

 L. incisum, DC. Syst. ii. 541, and various authors, but probably not of Koth; see Ascherson, 

 1. c. 109. L. mirranthnm, var. apetxdum, Ledeb. Fl. Ross. i. 205 ; Griitter, Deutsch. Bot. 

 Monatsschr. viii. 80; Winkler, Verb. Bot. Brandenburg, 1891, 106. L. ruderale, Hook. Fl. 

 Bor.-Am. i. 68; Torr. & Gray, Fl. i. 115; Torr. in Fre'm. Rep. 87; Gray, PI. Feudl. 10; 

 Hook. f. Arct. PI. 286, 320 ; not L. L. intermedium. Gray, Man. ed. 2-6 ; Wats. Bot. King 

 Exp. 29, in part, and autliors, as to eastern plant. L. lasiocarpum, var. tenuipes, Wats. 



