LEPIDTOM. CRUCIFER.E. 63 



leaves oblong, obtuse, denticulate, erect, the lower ones narrowed to slen 

 der petioles ; the upper sessile by a long sagittate-clasping base : pedicel- 

 horizontally spreading, a little shorter than the thickish, papillose caps- 

 sule : petals white : anthers yellow : style slightly exserted from the narrow- 

 notch. In wet places, Waldo Oregon and across the continent. Intro- 

 duced from Europe. 



2 Stigma sessile or subsessile. Pods emarginate or retuse 

 at the apex. Cotyledons (in ours) incumbent. 



L. Menziesii DC. Syst. ii, 539. More or less pubescent: stems slender 

 2-12 inches high from an annual or biennial long slender perpendicular 

 root, simple, or branched above : radical leaves pinnately parted, petiolate, 

 pubescent or somewhat' hirsute ; segments lanceolate, acutish ; cauline 

 leaves merely toothed, the upper linear and entire: racemes 1-several, not 

 contracted near the summit ; pedicels slender early spreading, longer than 

 the pods: petals 4, white, exceeding the sepals: stamens 2-4: pods orbic- 

 ular retuse glabrous about 1% lines in diameter : seeds narrowly winged 

 on one edge. Cliffs and sandy or rocky banks, Oregon to Brit. Columbia 

 near the coast, not common. 



L. occidentale HowellEryth. iii, 32. Stems, erect 3-12 inches high 

 from an annual root pubescent below with short simple white hairs, pub- 

 erulent above, freely branching: leaves 1-3 inches long, the lower pinna- 

 tifid with obovate to oblanceolate segments, gradually reduced upwards to 

 linear bracts : petals white, obovate, narrowed below to a short claw, 

 rounded at the apex longer than the obovate sepals : stamens 4, about 

 equaling the petals : pods orbicular, 1^ lines broad, on long slender divari- 

 cate pedicels: style very short: seeds obovate, retuse below, narrowly 

 winged on the outer edge. On rocky hillsides, Umpqua valley, Oregon 

 and on cliffs of Cape Foulweather. Doubtless at other places along the 

 <joast. 



L. medium Greene Eryth. iii, 36. L. intermedium Gray PL Wright, 

 not A. Richard. Glabrous or puberulent: stems erect , branched 6-18 

 inches high, from a rather stout annual root: lower leaves 1-2 inches 

 long, toothed or pinnatifid ; the upper often entire or but sparingly 

 toothed, oblanceolate or linear: petals wanting, stamens 2 ; style very 

 short : pods rounded 1-1 K lines broad, with short and obtuse teeth : pedi- 

 cels spreading, 3 lines long. Sandy places and hillsides, California to 

 Brit. Columbia and Utah, east of the Cascade Mountains. 



L. apetalum Willd. Sp. iii, 439. Stems erect 1-2 feet high, slender, 

 odorless ; leaves somewhat narrow, dull green, the radical ones more or 

 less incisely toothed or pinnatifid ; segments usually acutish : flowers 

 closely aggregate, the pedicels remaining nearly erect in flower, but in 

 fruit regularly and widely spreading, thus making the racemes appear as 

 if contracted just below the summit : petals wanting : stamens 2 : pods gla- 

 brous, orbicular, retuse on short pedicels. Eastern Oregon to Texas and 

 the New England States. 



L. lasiocarpum Nutt. T. & G. Fl. i, 115. Hispidly pubescent: stems 

 decumbent branching from or near the base : lower leaves pinnately 

 parted, segments usually rather broad, obtuse or rounded, sparingly 

 toothed or entire : racemes several : pedicels distinctly flattened, horizon- 

 tally spreading, 1-1^ lines long: sepals broadly oblong usually purple, 

 with thin white margins : petals minute or none : pods suborbicular, thin 

 margined near the apex, hispid pubescent upon both faces, or at least 

 upon the edge. Southern California to Texas and Colorado. Introduced 

 upon R. R. ballast in Oregon, Henderson. 



L. nitiduin Nutt. 1. c. 116 Glabrous or somewhat pubescent : stems sim- 

 ple or branched, 3-16 inches high : leaves pinnately cut into linear acumi- 

 nate segments, the uppermost often entire: pedicels flat, 1-2 lines long: 



