282 PITTONIA. 
of the Coast Range in San Mateo County, California, 10 
June, 1887. Collected by the writer, and distributed under 
the name U. Lyallii, from which its low stature, firmer, 
broader and somewhat angular foliage, as well as its broader 
achene, puncticulate under a lens, make it readily distinguish- 
able. 
HESPEROCHIRON CILIATUS. Leaves rather few, the blade 
oblong, obtuse, less than an inch long, tapering to a winged 
petiole of twice its own length, the margins closely and some- 
what retrorsely ciliolate, the whole herbage otherwise glabrous: 
peduneles very slender, exceeding the leaves: calyx parted 
to the base, the segments linear-oblong, ciliotate: corolla 
apparently small and little surpassing the ealyx. 
Soda Springs of Esmeralda Co., Nevada (altitude 4500 ft.); 
collected in April, 1888, by Mr. W. H. Shockley. The species 
well marked by its slender habit, and small flowers borne on 
almost filiform peduncles longer than the leaves. The peculiar 
eiliation of the otherwise glabrous leaves is very charac- 
teristie. 
PENTSTEMON ARENARIUS. Stems tufted and low (a foot 
high), stoutish, pale green, glabrous and viscid : leaves lance- 
olate, coarsely callous-toothed, the cauline an inch or two 
long, sessile: thyrsus short, leafy bracted : sepals lanceolate, 
acute, scarious-margined, their tips lax and apt to be recurved: 
corolla flesh-color, a half inch long, narrowly funnelform, the 
lobes short, spreading : sterile filament as long as the others, 
heavily bearded at tip. 
' At Belleville, Esmeralda Co., Nevada, W. H. Shockley 
(No. 348). Allied to P. deustus, but a very viscid plant, the 
specimens coated throughout like sand-paper, with the desert 
sand in which they grew. 
MIMULUS GLAREOSUS. Annual, slender, diffuse, the branches 
a foot long or less: retrorsely pubescent and viscous : leaves 
round-ovate, 2 inch long, on slender petioles of equal length, 
