68 PITTONIA. 
when much exposed to the sun, the stipitiform base and also the 
segments much as in Æ. umbellatum. 
Black Cañon of the West Humboldt Mountains, Novatit on 
the most arid and otherwise barren rocky slopes, 29 July, 1895, 
collected by the writer only. 
E. MODOCENSE. . Suffrutescent, but not mnch more so than £. 
umbellatum, the basal leafy branches more rigid and divaricate: 
leaves not more than an inch long including the petiole, this 
usually shorter than the round-obovate blade, this densely white- — 
tomentose beneath, as also the upper face of it when young, but 
this eventually glabrous: scapiform peduncles 4 to 6 inches — 
high, stoutish, rigidly erect, floccose-tomentose; bracts of the 
involucres oblanceolate; rays of the simple umbel 4 to 7: peri- — 
anths large in maturity, yellow tinged with red, the segments — 
obovate-spatulate, very obtuse, the outer rather shorter, the 2 
stipitiform base scarcely 3 line long. 
The type specimens of this are from Davis Creek, Modoc Co. 
Calif., Aug. 1894, collected by Mrs. L. A. M. Black. Others — 
quite like these but younger are from Mt. Dyer, in the same — 
region, by Mrs. Austin, some of these obtained as far back a8 
1880. A larger form of what may perhaps be the same was 
sent by Mrs. Austin from southeastern Oregon, 1893, these 3 
specimens though with tall peduncles, are too young and frag- 
mentary to be referred very positively to this species. 
E. Rypperet. In aspect much like the last, though more 
pie nn eee Se ee hh a a er 
SY th r TESSY? aii 
largely suffrutescent ; leaves as large, but blade elliptic-ovate _ 
and shorter in proportion to the petiole, tomentum less dense 
beneath, also less dense above and scarcely deciduous: pedun- 
cles not stout, 3 to 5 inches high, the simple umbels with only — 
3 or 4 rays and these short: perianth of a light greenish yellow, — 
segments elongated-oyal, rounded at summit but not very obtuse, 
their midveins below and also the 1-line-long stipitiform base — 
granular-puberulent, or perhaps rather resinous-granular. 
This, so much like Æ. Modocense in general appearance, yet- | 
