Cruciferce.] 



CALIFORNIA.— SUPPLEMENT. 



323 



1 . Sisymbrium brachycarpum. Richards. — Hook. Fl. Bor. Am. 1 . p. 62. — S. canescens. b. 

 Torr. et Gr. Fl. 1. p. 92. 



Hab. Snake Country. Confluence of Reed's River with the Snake River. ( Tolmie.) 



2. S. curvisiliqua. Hook. FL Bor. Am. 1. p. 61. — Nasturtium. Nutt. in Torr. et Gr. 

 Fl. I. p. 73. 



Hab. Snake Country. (Tolmie.) 



1. Erysimum asperum. DC. — Hook. Fl. Bor. Am. 1. p. 64. 22. Torr. et Gr. Fl. 1. 

 p. 95 E. elatum. Nutt. in Torr. et Gr. Fl. ]. p. 95. 



Hab. Snake Country ; about the American falls on the Snake River, and at Green River. ( Tolmie.) 



2. E. ? glaberrimum ; foliis radicalibus spathulatis caulinis pinnatifidis supremis lineari- 

 bus integerrimis. 



Hab. Snake Country. Confluence of Reed's River with the Snake River. (Tolmie.) — Root perennial, 

 bearing- at the summit several erect stems, scarcely a foot high, and their stems are simple. Lower leaves 

 spathulate, entire, soon withering ; the principal ones of the stem pinnatifid ; the uppermost ones linear, 

 entire : all glabrous, as is every part of the plant. Corymbs of several rather small flowers. Calyx glabrous, 

 of four membranaceous ovato-lanceolate leaves. Petals yellow, but not very bright. Petals obovate, clawed, 

 nearly twice as long as the calyx. Young siliqute narrow, linear. 



1. Lepidium corymbosum ; glabrum, ramis corymbosis, foliis pinnatifidis inferioribus 

 bipinnatifidis, floribus dense corymbosis, petalis 4, siliculis apteris (parvis) orbiculari- 

 ovatis obsolete emarginatis, stylo exserto. 



Hab. Snake Country. American falls of Snake River. {Tolmie.) — A very distinct species. Root 

 annual. Whole plant glabrous. Stem erect, rigid, a span to a foot high, bearing, especially in the upper 

 half, several erecto-patent branches, the lower ones the largest, so that all the specimens have a very corym- 

 bose appearance, and each branch bears several corymbs of largish white flowers. Leaves 1-2 inches long, 

 pinnatifid ; the segments oblong, those of the lower leaves again pinnatifid. Corymbs very dense, and the 

 fructified racemes are very short. Siliculae small, quite glabrous, broadly ovate, approaching to orbicular, 

 wingless, scarcely notched, and with a rather considerably exserted style. 



2. L. latipes; humifusum caespitosum, foliis bipinnatifidis, floribus densissimis, pedicellis 

 latissimis planis, siliculis ellipticis reticularis hirsutis antice bialatis alis rectis longitudine 

 siliculorum, stigmate sessili. Hook. Ic. PI. t. 41. Torr. et Gr. Fl. \.p. 116. 



This is a remarkable plant, of a singularly compact mode of growth ; the branches stout, downy, humifuse ; 

 the leaves many of them 3-4 inches long, glabrous, or only here and there ciliated, bipinnatifid ; the segments 

 linear. Corymbs of exceedingly numerous, very closely placed, small flowers, succeeded by broad crowded 

 racemes of fruit. Petals small, ciliated. Pedicels broad and quite flat, downy. Siliculas large for the size 

 of the plant, elliptical, compressed, reticulated, more or less clothed with white hairs : the margin of the dis- 

 sepiment broad ; the apex on each side the minute sessile stigma extends into two acuminated wings, nearly 

 equal in length with the pouch. 



3. L. oxycarpum ; subpubescens, caulibus procumbentibus gracilibus, foliis linearibus 

 integris vel pinnatifidis, fructus racemis laxis, pedicellis latis compressis patenti-reflexis, 



