CATALOGUE. 299 



inner and the filaments more or less villous at base ; ovary sparingly hirsute 

 above. — From Washington Territory to south-eastern Wyoming. On the 

 Trinity Mountains and above Roberts Station, Nevada ; 6,000 feet altitude ; 

 May-July. (1,007.) 



Var. (E. Andinum, Nutt.) A reduced form vs^ith smaller bright-yellow 

 flowers and glabrous achenium. In the Virginia and Pah-Ute Mountains, and 

 Ruby Valley, Nevada ; April-September. (1,008.) 



Ekiogonum sph^eocephalum, Dougl. T. Sf O., I. c, p. 157. Hoary- 

 tomentose; stems ascending or erect, from a shrubby base, branching, leafy; 

 leaves spatulate or narrow-oblong, narrowed at base, whorled and fascicled, 

 or few and alternate, upper surface at times glabrate ; peduncles short, usually 

 solitary, sometimes subumbeled or dichotomous ; involucres naked, deeply 

 6-8-cleft, the lobes narrow, spreading, finally deflexed; calyx yellow, the 

 stipe-like base about equaling the pedicel, segments oblong-ovate or the inner 

 ones spatulate ; filaments villous at base. — ^Very variable. California to 

 Washington Territory and Montana. Form (5) of T. & Gr. is the only one col- 

 lected ; leaves 6-9" long, hoary with a fine closely appressed tomentum ; 

 stems more simple and much less leafy ; calyx finely pubescent. Low (6-8',) 

 with bright-yellow flowers ; found growing in broad patches on the foot-hills 

 of Regan's Valley, Nevada ; 5,000 feet altitude ; June. (1,009.) 



Eeiogonum heeacleoides, Nutt. T. Sf G., I. c, p. 159. Rather slender, 

 wooUy, tomentose or webbed ; sterile branches decumbent, subcsespitose, 

 fasciculate, leafy at top ; flowering branches or scape-like peduncles sometimes 

 naked, most usually with a whorl of leaves in the middle, with a simple or 

 compound umbel, for the most part involucrate-bracted ; leaves spatulate- 

 oblong or oblanceolate, white-woolly beneath or on both sides ; involucre 

 6-8-clefit, the lobes spreading and soon reflexed, with numerous flowers ; 

 segments of the pale-yellow very glabrous calyx scarcely longer than the very 

 slender stipe; filaments villous below; ovary more or "less finely hirsute 

 toward the top, especially upon the angles ; cotyledons orbicular, equaling 

 the incurved radicle.— The typical form is 14-2° high ; leaves becoming 

 glabrate above; umbel compound, many-rayed; flowers pale, smaller than in 

 E. umhellatum, the stipe proportionally longer. Washington Territory to 

 Nevada. East Humboldt Mountains, Nevada, and in the Wahsatch, fre- 

 quent; 6-9,000 feet altitude ; June-August. (1,010.) 



Var. MINUS, Benth. Rather smaller, sometimes with leaves only sub- 



