NOVITATES OCCIDENTALES. 21 
brittle, abundantly leafy below, the leaves diminishing 
upwards, all linear, plane, obtuse, and with the whole plant 
canescently hispidulous: heads in a very lax terminal 
corymb; bracts of involucre in 2 or 3 series moderately 
unequal; rays rather few and broad, violet. 
Species in some sort intermediate between E. Breweri and 
E. foliosus, but specifically different from both. It is Mr. 
Coville’s n. 931, from the Coso Mountains in eastern Cali- 
fornia, distributed to several herbaria though not enumerated 
in the published list of Death Valley Expedition plants. 
Erigeron Hartwegi. Stems erect, a foot high, tufted and 
from a perennial perpendicular root, neither brittle nor 
notably rigid, equally leafy up to the corymbose cluster of 
3 to 7 rather large heads; pubescence of the whole plant 
quite scanty and strigose, with nothing of the hispid or 
scabrous: leaves ascending: leaves linear, with strong mid- 
vein and a very narrow revolute margin: heads 3 inch broad 
including the numerous and rather broad pale bluish-purple 
rays; involucre minutely scabrous and strigose, the bracts in 
2 slightly unequal series. 
Common among the foothills of the Sierra Nevada, Cali- 
fornia, to the northward of Sacramento, east of Marysville, 
ete. First collected by Hartweg; afterwards by Fremont, 
Bigelow, and by the present writer. 
Erigeron petrocallis. Stems tufted from a suffrutescent 
base, only a span high, slender, rather rigid and brittle, 
somewhat corymbosely branching from below the middle, or 
the smaller simple and monocephalous, only sparsely leafy; 
herbage green but clothed throughout with a short and very 
rigidly hispidulous pubescence which is distinctly retrorse 
on stem and branches, as often upon the foliage also: leaves 
oblong-linear, or the lowest spatulate-oblong, less than an 
inch long, obtuse, sessile by an obtuse base, the uppermost 
reduced to small bracts of similar outline: heads hemi- 
spherical, ? inch broad including the rays; bracts of involucre 
nearly glabrous, in 2 not very unequal series; rays broadish, 
30 or more to the head, violet. 
