308 BOTANY. 
Humboldt Moimtams, Nevada. Collected in Star Canon of the same range ; 
5,000 feet altitude ; September. (1,035.) 
Eriogonum ceenuum, Nutt. T. G., I c, p. 182. Annual, slender, 
4-12' high ; leaves radical or sometimes cauline, round or obovate, somewhat 
long-petioled, floccose-woolly ; panicle glabrous, widely spreading, decom- 
pound, usually very many-flowered ; pedicels soon deflexed, smooth, 2-3 
times longer than the campanulate glabrous many -flowered involucre ; bract- 
lets setaceous, short, subnaked; calyx w^hite or pinkish, glabrous, 6-cleft, 
turbinate and acute at base, the outer segments square, emarginate or retuse, 
scarcely exceeding the oblong half-as-wide inner ones. — Involucres not over 
1" long; flowers scarcely as long and often much shorter, and well-marked 
by the top-shaped base. Western Texas to Arizona and north to ^yyoming 
and Idaho. Var. tenue, T. & G. Panicle more slender, and with less nu- 
merous flowers; pedicels capillary, elongated, 3-12" long; involucre smaller 
or more slender, few-flowered. — Ruby Valley and Humboldt Pass, Nevada, 
on the foot-hills of the Wahsatcb and in Bear River Valley, near Evanston, 
Utah; 5-G,000 feet altitude ; July-Sei>tember. (1,036.) 
Eriogonum pusillum, T. & Gr. ; /. c, p. 184. Annual, often small, 2-10' 
high; leaves radical, 2-12" in diameter, round and obovate, usually narrowed 
into a petiole i-lj' long, the larger often subcordate at base, white-woolly 
beneath, floccose above ; bracts rather small, in fours at the nodes and base 
of the loose somewhat simple or effusely branched panicle, glandular and 
woolly within ; pedicels very slender and elongated, in the forks ^-1' long, 
not deflexed ; involucre nearly hemispherical, coarsely 5— 6-toothed, 10-15- 
flowered, minutely glandular, less than 1" long ; bractlets obovate and spatu- 
late, loosely webby-woolly below ; calyx yellow, sometimes tinged with purple, 
becoming nearly 1" long, sHghtly glandular-puberulent, very obtuse at base, 
deeply 5-parted, the segments nearly similar, the outer oval-obovate, a little 
larger than the oblong inner ones. — Foot-hills of the Trinity Mountains, Ne- 
vada; 5,000 feet altitude ; May. (1,037.) 
The original description, here slightly modified, was founded on a dwarf 
precocious form. Better developed specimens (ticketed by Dr. Gray E, 
reniforme) have larger subcordate leaves and a more branched panicle. The 
very nearly allied E. reniforme, Torn, collected by Fremont on the Sacra- 
mento, and by Cooper and Palmer in Western Arizona, first described in 
Fre'mont's report, has the leaves densely and very softly woolly on both sides 
