14 [Feb. 



tomeiitose. Leaves about a line wide and about 3 or 4 long. Flowers yellow 

 and bright, externally somewhat pubescent, as well as the germs. 



E. *Andhitt,m. 8temless, ceespitose, the caiidex much divided ; leaves small 

 and spathulate, wholly and whitely tomentose, reflected on the margin ; scapes 

 all radical, terminating in a single capitulum; involucrum divided nearly to the 

 base, the segments about 8, leafy ; flowers yellow, small. 



Hab. With the above. (Nuttall.) 



With a woody brown subterraneous stem, terminating with cjBspitose tufts of 

 white, softly tomentose leaves ; scape 2 or 3 inches high, with a small umbel of 

 bright yellow flowers, which are pubescent externally, and reflected from the 

 multifid involucrum, which is divided into eight small, leafy appendages. Germ 

 smooth. Stigmas rather long. 



E. *denudatum. Annual, very smooth, excepting the under surface of the 

 leaves, which are tomentose; leaves all radical and small, roundish reniform, on 

 long petioles ; stems many, all from the base, naked and scapoid, terminating in 

 a single invohicrum, or corymbosely terminated by 2 or 3; involucres double, 

 the outer or bractes short and 3-cleft, the inner 8-toothed and strongly ribbed, 

 bearing tufts of abortive filaments ; perigonium smooth, (purple.) 



Ka.b. In the Rocky Mountains of Upper California. 



E. *racf'.mos!t.m. Scape naked and whitely tomentose, as well as the elliptic 

 ovate leaves, sparingly forked at the summit, with the solitary involucres ses- 

 sile and forming a spike ; involucrum very woolly, obsoletely toothed, subtended 

 by a 3-cleft sheathing involucel or bractes; perianth smooth, oblong, attenuated 

 at the base, (flowers ochroleucous?) 



Hab. Colorado of the V\ est. 



E. '^ellipticum. SufFiuticose ; barren branchlets at the base of the scapoid 

 stem; leaves elliptic or olilong-elliptic, beneath whitely tomentose, above nearly 

 smooth; umbel compound, the forked divisions and general umbel involucrate; 

 the involucels leafy and spreading; involucrum campanulate, lanuginous, 6-cleft, 

 the segments rather longer than the tube, very many-flowered ; perianth exserted, 

 oblanceolate, attenuated to the pedicel, smooth, (or pubescent ?) 



Hab. Kocky Mountains. (Nuttall.) 



j3. megacephalum. Leaves oblong, subelliptic ; perianth pubescent; umbel 

 simple. 



Hab. With the above. 



E. *gcn!culu(uiu. SufFruticose, low and considerably branched ; stems clus- 

 tered ; leaves linear, somewhat oblong, revolute on the margin, pubescent above, 

 tomentose beneath ; umbels simple, of few rays, the involucrum of the umbel 

 long and leafy; proper involucrum campanulate, many-flowered, lanuginous; 

 the border many-cleft, the divisions spreading and nearly as long as the cup; 

 ■ flowers yellow, numerous and small, obconic, externally pubescent towards the 



base. 



Hae. In the Rocky Mountains, on the western slope. (Nuttall.) 



E. *cerniium. Q. Leaves all radical, round oval, upon longish petioles, 

 very whitely tomentose beneath, less so above; scape smooth, two or three 

 times dichotomous ; involucres solitary, pedicellate, smooth, pedicels exserted, at 



