PLANTS COLLECTED BY DR. GAMBEL. 161 



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

 white, softly tomentose leaves ; scape two or three 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. Considerably allied to E. ccespitosum, but with the 

 leaves scarcely half the size, much narrower, the flowers yellow, not ochroleucous, 

 and scarcely half the size of those of the E. ccespitosum. 



Had. With the above.f (Nuttall.) 



E. iNTRiCATUM. (Benth.) 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 involucrum, or corymbosely terminated by two or three ; 

 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.) 



E. denudatum. .Nutt. Proceed. Acad. Nat. Sci. Feb., 184?. 



An annual about a span high, with numerous long, slender, almost filiform, naked 

 stalks, like so many radical scapes, but bearing here and there a minute leaf or leaves. 

 The leaves (in the only specimen I have obtained,) are very small, scarcely exceeding 

 those of garden thyme, and roundish-reniform ; very smooth above, of a thick 

 consistence, and with a circumscribed tuft of white tomentum beneath. Some of the 

 stems are proliferous, sending up secondary stalks, subtended also by a few small 

 leaves; involucrum smooth, with eight broad ribs, and as many terminal teeth; a 

 3-cleft short involucellum, of the same consistence with the involucrum. Perigonium, 

 purple, smooth ; stamens nine ; anthers purple; germ smooth. A great number of 

 slender, infertile filaments arising from the inner base of the involucrum. 



Hab. In the Rocky Mountains of Upper California. 



E. *RACEiiosuivi. Scape .naked and whitely tomentose, as well as the elliptic ovate leaves, sparingly forked 

 at the summit, with the solitary involucres sessile 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 1) 



Scape about eighteen inches high, leaves on longish petioles, very white beneath ; 

 racemes, five or six, produced from shortish forks of the scape towards its summit ; 

 flowers numerous, rather large, woolly filaments among the fertile ones in the 

 involucrum. 



Hab. Colorado of the West. 



E. *ELLiPTicu5i. Suffruticose ; barren branchlets at the base of the scapoid stem; leaves elliptic or 

 oblong-elliptic, beneath whitely tomentose, above nearly smooth ; umbel compound, the forked 

 divisions and general umbel involucrate ; the involucels leafy and spreading; involucrum campanulate, 

 lanuglnous, 6-clefl, the segments rather longer than the tube, very many-flowered ; perianth exserted, 

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



t These two remarkable species were collected by myself, in 1834. 



