28 BOTANY. 
lower stem and leaves pilose with scattered hairs, more or less glabrous 
above; calyx slightly pilose, 4" long; immature siliqucs 3-4' long, wide. 
Very near C. procerus, but readily distinguished by its obtuse sihques. On 
dry foot-hills in the Truckee Valley, and near Humboldt Lake, Nevada ; 
May. (113.) 
Caulanthus hastatus. Perennial, glabrous, simple or somewhat 
branched ; leaves petioled, very variable ; radical ones lyrate or entire, the 
terminal leaflet ovate, acute, hastate, or truncate at base ; cauhne leaves 
ovate-oblong, entire, luistate, rounded or cuneate at base ; flowers greenish- 
yellow, in a loose virgate raceme, reflexed ; sepals narrow-lanceolate, distant; 
petals (sometimes neai-ly wanting) equaling the sepals, sublaciniately toothed 
laterally; sihques linear, subterete, obtuse, spreading; seeds flattened, sHghtly 
margined or iminarginate ; cotyledons nearly accumbent.— A stout, somewhat 
glaucous plant, 3-5° high, with large heteromorphous, but often hastate 
leaves, which when lyrate have the few small lateral leaflets distinct along the 
narrow rachis. On shaded slopes in the Wahsatch and Uinta Mountains; 
6-7,000 feet altitude ; June-August. Plate III. Fig. 1. A floweriug plant, 
one-half the natural size. Fig. 2. A flower. Fig. 3. A petal ; both enlarged 
four diameters. Fig. 4. A pod, of natural size but shorter than the average. 
Fig. 5 and 6. A seed, in position, and its embryo ; enlarged four diameters 
(114.) 
Brassica (sinapis) nigra, Benth. & Hook. Near a deserted ^^city" in 
the West Humboldt Mountains; doubtless introduced. (115.) 
Brassica (sinapis) campestris, L. Found growing among sage-brush 
in several localities in Nevada, but at no great distance from the Overland 
Stage-road, and doubtless introduced. (116.) 
Capsella Bursa-pastoris, Moench. Frequent among sage-brush near 
Camp Douglas, Utah. Introduced. (117.) 
Capsella divaricata, Walpers. {Hymenolohus, Nutt.) Erect or sub- 
decumbent, branched ; leaves ovate and entire, or pinnatifid with several oblong 
lobes ; upper leaves hnear and often entire ; sihcle elliptic-oblong, obtuse.— A 
small slender-branching glabrous annual, 2-6' high. In numerous specimens 
from half-a-dozen localities, it is rarely that a pinnatifid leaf is found; the radi- 
cal leaves are more usually ovate, on petioles equaling or exceeding the blade ; 
occasionally sinuate dentate or pinnately lobed. Collected by Nuttall on the 
Columbia, by Parry in Southern California, and by Anderson near Carson 
