30 
BOTANY. 
branched above, the branches termmatmg in corymbs of 3-6 short racemes, 
1' Ion*?; pods v(mt siitall, 'J" in length, ovate, somewhat winged above, 
scarcely twice longer than the style ; branchlets hispidly pnbescent. Pah-Ute 
Range, Nevada; 5,000 feet altitude ; October. (123.) 
Lepidium Fremontii, Pereiniial, erect, diffusely branching, suffru- 
tescent at base, glabrous, glaucous ; leaves entire or rarely sparingly lobed, 
linear, obtuse, narrowed at base, somewhat fasicled ; racemes few-flowered ; 
petals ovate-s])atulate, twice exceeding the sepals; stamens 4; pods large, 
orbicular, wingless, very slightly emarginate; style short; cotyledons incum- 
bent. — ^Fiich branched, l°high; racemes less than 12-flowered. Gathered 
by Fremont on tlic Mohave River in 1844, and now collected on sandy foot- 
hills near f lie Humboldt Sink. The amount of material is still scanty, but 
sufficieni to givt^ the characters. Plate IY. Fig. 1. The extremity of a 
branch; natural size. Fig. 4. A flower; enlarged four diameters. (124.) 
Lepidium dictyotum, Gray. Proc. Amer. Acad. 7. 329. Annual, 2-3' 
liigh; puberulent throughout ; leaves narrowly linear, entire orpinnatifid with 
linear lobes; petals small, oblong, a little exceeding the calyx, or wanting; 
stanuMis 4; pods finely reticulated, sul)ovate, somewhat winged at the apex, 
(lr(^ply eniariiinate, longer than the thick flattened erect pedicel Racemes 
st rict, shorter t ha ii tlu' leaves ; silioues ])ecoming nearly 2" long. Near Carson 
Gity, Nevada, where it is eoninion under sai>e-brush ; April; collected in the 
same reirioii by :\faiin and Anderson. In the specimens from which the 
oriaiiiid description was drawn, the flowers were apetalous and the leaves 
(Mitire. l*i.ATF. IV. Fii>-. 1. A plant ; natural size. Fig. 2. A nearly mature 
pod, showinir the calyx and petals; enlarired four diameters. (125.) 
Lki'idii-m KLAYtTM, 4\.rr. Pac. P. P. Swu., 4. 67. Aimual, diffusely 
branchrd. (h'cund>ent , dabrnus-. leavers rather thick, oblong-spatulate, the radi- 
eal oiws pinnatitid with short rouiuh'd lobes, the cauUne sparingly toothed or 
entire ; flow<n-s v<-iio\v, capitate : petals obovate, unguiculate ; stamens 4 ; pods 
broadly ovate, n^tieulate, with a ])road sinus between the short narrow wings; 
style slembn-, nc^arly e.|ualing the pod ; cotyledons incumbent.—Stems becom- 
ing 6' in lemxth, with numerous densely capitate racemes, pedicels reflexed in 
fruit. Collected l)y Fremcmt near :\r(diave Creek m Western Arizona. Fre- 
(juent about Humboldt Fake. Nevada; May. (126.) 
FKrinir^r xaxum. IVremiial, dwarf, matted-c;espitose, glabrous, ex- 
cepting tln^ pubescejd pedicels; leaves crowded, small, ovate-spatulate, 
