CATALOGUE. 177 



slightly connate at base, lanceolate, callous-denticulate, sometimes with 

 3-5 distinct ribs; flower, including rays, 18" in diameter. — Twin Lakes, 

 Colorado (568). 



Senecio lugens, Richardson, var. Hookeri, D. C. Eaton. (Senecio 

 lugens, Hook.) — Nevada. 



Var. foliosus, Gray. (S. lugens, var. exaltatus, Eaton in Bot. King's 

 Exped. [fide Gray].) — " Hoary with white wool up to the flowering state, 

 and the stem conspicuously leafy almost to the top" (Gray, Fl. Cal 1, p. 

 413.)— South Park and Twin Lakes, Colorado (567, 587). 



Senecio triangularis, Hook. — Twin Lakes, Colorado (563); Utah. 



Senecio Andinus, Nutt. — Mountains of Colorado near South Park 

 (564, 565). 



Senecio aureus, L., var. croceus, Gray. — Utah. Var. borealis, T. & 

 G. — South Park, Colorado (566). Var. Wernerl&folius, Gray (Proc. 

 Phila. Acad. Nat. Sci. March, 1863, p. 68). — Csespitose, woolly at first; 

 radical leaves entire, petioled, spatulate-lanceolate, thickish, margins 

 slightly revolute, canescently tomentose beneath, more nearly glabrous 

 above ; scape leafless or with one or two bracts. — South Park, Colorado 

 (588), where it appears to be a common form and to hold its characters well. 



Senecio Douglasii, DC. — Glabrate form, from San Francisco Mount- 

 ains, Arizona. 



Senecio canus, Hook., var., with narrower, more entire leaves, and 

 longer rays than usual. — South Park, Colorado (559). 



Senecio cernuus, Gray (Silliman's Journ. n. s. vol. 33, p. 10). — "Gla- 

 brous stem slender, 1£° high, terminated by a many-headed panicle; leaves 

 lanceolate attenuate at base into a long, margined, subciliate petiole, spar- 

 ingly sharply toothed or subentire; heads smallish (hardly 6"), discoid, 

 nodding on a 1-2-bracteolate pedicel; involucre sub-calyculate, of lax 

 bracteoles; ovary smooth." — Twin Lakes, Colorado (583). For want of 

 the specimen, I have been obliged to quote the original description of 

 Professor Gray. 



Senecio longilobus, Benth, var ploccoso-incana, Gray. — 2° high, 

 from a woody base, much branched; entire plant more or less white and floc- 

 cose-canescent; leaves 1-3' long, entire and narrowly linear or deeply 

 12 BOT 



