/■Jriououiim. POLYGUNACEyK. 21 



3 lines long, more shortly stipitate at Inisc : akeno smooth. — Proc. Am. Acad, 

 viii. 1G2. 



Alpine or subaliiiiie in the Sierra Nevada, from Silver Mountiin {Brewer) to Siski3'ou County, 

 Greene. 



•i— -t- Involucre with short teeth, erect or nearly so: 2^e(Z«;io/es naked {except 



in n. 13). 



++ Fcrlantli villous: peduncles from a short and thick sparingly branched cau- 

 dex : umbel simple. 



9. E. pyrolcefolium, Hook. Leaves thick, glabrous, round-obovate to oblong, 



3 to 9 lines broad, mostly abruptly attenuate into a short petiole, broad and villous 

 at base : peduncles smooth, 2 or 3 inches high, bearing a 2-bracteate umbel of 1 to 



4 very shortly pedicellate involucres, which are sinuately toothed and villous : 

 (lowers rose-colored, 1.^ to 2 lines long, lather sparingly hairy. — Kew Journ. Bot. 

 V. 395, t. 10; Torr. & Gray, 1. c. 1G2. 



Mount Sliasta (Jcfrcij) ami Lassen's Peak, in voleanie ashes, Lcmmon. A more toinentose 

 form with narrower ami densely toinentose leaves (var. cori/p/ucnm, Torr. & Gray, 1. c.) was col- 

 lected by Lyall in the Cascade Mountains. 



E. FIAVUM, Nutt. Tonientose throughout, with oblanceolate long-petioled leaves, and rather 

 slender peduncles 3 to 8 inches high : umbel simple, of 3 to i) rays an inch long or usually much 

 shorter, sometimes reduced to a head of (one to several) nearly sessile involucres : bracts 3 to 8, 

 oblanceolate : involucre large, repandly toothed often obscurely, becoming brown and somewhat 

 membranaceous: flowers yellow, very villous, 2 or 3 lines long. — Torr. & Gray, 1. c. 156. 

 /;. crasnifolinm, IJenth. in Honk. Fl. 15or.-Am. ii. 134, t. 176. A common species, ranging 

 from Washington Territory and Oregon to the Saskatchewan and Western Arkansas, and may be 

 found in Northern California. 



++ ++ Perianth (jlabrous: pc/liniclcs from a. diffusely branched woody base. 



= Umbel compound, villous-tomentose : bracts consjiicuous. 



10. E. ursinum, Watson. Densely tomentose, the peduncle and umbel some- 

 what villous : leaves ovate, acute, 4 to 6 lines broad, cordate or cuneate at base, 

 exceeding the petiole, greener above : peduncles stout, G to 1 2 inches high : umbel 

 G- 12rayed, with elongated oblanceolate or linear bracts : involucres large and tur- 

 binate, sharply toothed : flowers pale, 1^ to 2| lines long : filaments very villous.— 

 Proc. Am. Acad. x. 347. 



In the Northern Sierra Nevada ; Plumas County, apparently abundant, Lcmmon, Mrs. M. E. 

 P. Ames. 



= = Umbel simple, tonientose, the central involucre sessile or all subcapitate : 



bracts small. 



11. E. incanum, Torr. <fe Gray. Somewhat cespitose and matted, tomentose: 

 leaves oblanc^eolate or oblong-spatidate, a half to an inch long, on short petioles : 

 peduncles slender, 2 to 8 inches high : umbel of 5 to 8 slender rays, subtended by 

 a few small linear bracts, the central involucre sessile, or the umbel reduced to 

 a small head: involucres small (U lines long), strongly toothed: flowers yellow, 

 often tinged with red, 1 to 3 lines long. — Proc. Am. Acad. viii. IGl. 



In the Siena Nevada, Mariposa and Tuolumne counties, at 8,000 to 11,000 feet altitude. 



12. E. marifolium, Torr. & Gray, 1. c. Very slender, tomentose, the base dif- 

 fusely branched : leaves ovate to oblong, 3 to 6 lines long, densely tomentose both 

 sides or at length glabrous above : peduncle 2 to 12 inches high : umbel of 5 to 8 



•reduced or sometimes much elongated ray.s, with short linear bracts: involucre a 

 line long : flowers yellow or yellowish, 1 to 2^ lines long, the smaller apparently 

 only staminate. 



In the Sierra Nevada, from Mariposa County to Mount Shasta, at 7,000 to 9,000 feet altitude ; 

 .ilso near Pyramid Lake, Nevada, Lemmon. 



