20 PULVGONACE.E. Erhyonum. 



turbinate tube : flowers yellow or yellowish, 2 or 3 lines long. — Ann. Lye. K Y. 

 ii. 241 & Sitgr, liep. t. 12; Uentli. 1. c. 11 ; Torr. & Gray, 1. c. IGO. 



Vur. monocephalum, Torr. & (Jray, 1. c, A dwarf alpine or higli-uiountain 

 form, with tlie umbel reduced to a single ray, i. e. the naked or braeteate peduncle 

 bearing a solitary involucre: leaves small. — E. I'olmieainna, Hook. Fl. lior.-Am. 

 ii. 134; Benth. 1, c. 



A conimoii species in tlie inount.iiiis of Noitliern Califoniia and Oregon, and eastward to tlie 

 Koeky .Mountains, at 0,000 to 10,000 leet altitmie. 



5. E. Torreyanum, Gray. (Jlabrous throughout excepting the involucredobes ; 

 leaves obovate- to nijlmigspatulate, an incli or two long, rather thick : ))eduncles 

 stout, naked or rarely with a single leaf in tlu; niiildle, G to lU inches high, bearing 

 a few-rayed umbel ; lateral rays leafy-bracted in the middle and often divitled : 

 flowers large (3 or 4 lines long), yellow often tinged with purple : ovary glabrous. — 

 Torr. & Gray, 1. c. 158. 



In the Siena Nevada, from Silver Mountain northward, Torrcy, Kellogg, Lcminon, etc. 



G. E. Btellatum, Uenth. More or less tomentose, the stems rather more diffuse 

 and leafy : leaves ovate-spatulate to oblanceolate : jjeduncle naked, 6 to 12 inches 

 high, bearing an umbel of 2 to 4 mostly elongated rays which are usually and often 

 repeatedly divided in a cyniose manner; the nodes and lateral rays all leafy-bracted : 

 flowers as in A', umhellatnm. — Linn. Trans, xvii. 401) ; Hook. Fl. lior.- Am. ii. 134, 

 t. 177. E. ellipticiim, Nutt. Pi. (laml)el. in Journ. Acad. Philad. n. ser. i. IGl. 

 E. jwlyanthnm, 15enth. in ])C. Prodr. xiv. 12; Torr. & (Jray, 1. c. 158. 



Yar. bahiseforme. lidlorescence much branched ; leaves mostly small and often 

 densely tomentuse on both sides. — E. iinlyanlhnm, var. bahueforme, Torr. & (Jray, 

 1. c. 159. 



In the mountains from Oregon to Southern Califoinia, cliiefly in tlie Sierra Nevada, more rarely 

 in Arizona and S. Utah {Anderson, Palmer, Wheeler) ; the variety near Fort Tejon {Hum, Jioth- 

 rock) and on j\It. San Carlos, Urctrcr. Distinguished lioni J-J. tunbcllaluin princijially by the 

 cliaracter of the inflorescence. 



E. JiKitAOi.KoiiU'.s, Nutt. ; Torr. k Gray, 1. c. ]59. A similar s]ieeies, densely tomentose with 

 the upper side of the narrowly oblanceolate leaves somewhat glabrate, and the peduncle nearly 

 always with a whorl of leaves in the middle, the margin of all the leaves usually somewhat revo- 

 lute ornndulate; nmbel aliout (5- (1-11-) rayed, sometimes simple, usually with some or all of 

 the rays once or larely twice divided ; (lowers often smaller. — Fiom the eastern part of "Wash- 

 ington Teriitory to Nevada and Utah, and may leach Northeastern Califonda. 



++++++ Perianth r/Iahrous : peduncles stout and naled, fi-oni a thick and short 

 sparbujh/ hra)iched cuudcj- : and>el usuallif compound: leaves larye, broadly 

 ovate or oblomj. 



7. E. compositum, Dough ^lore or less white-tomentose : leaves very densely 

 tomentose b(!in;ath, greener above, obloiig-ovate, cordate at base, acute or acutish, 

 1 to 3 inches long, on slender elongated petioles : peduncle very stout and fistulous, 

 erect, \\,o \\ feet high, nearly glabrous : umbel of G to 10 more or less elongated 

 rays, each bearing a sliort several-rayed umbellet, subtended by whorls of linear- 

 oblanceolate leaflets : flowers dull white or rose colored, 2 to 4 lines long. — Benth. 

 1. c. 11; Tori\ ik Gray, 1. c. 159. 



From Washington Teiritory to Idaho and Northern Californiii ; on volcanic rocks near Long 

 Valley, Mendocino County, Bolamler. 



8. E. Lobbii, Torr. & Gray. Gespitose, the very thick cauilex scarcely branched, 

 tomentose: leaves oval or rounded, ^ to 1^ inches long on rather stnut petioles, 

 thick and densely tomentose or somewhat glabrate above : peduncles 3 to 8 inches 

 high, decumbent : umbel of a few (about 3)^tout and usually very short rays, sub- 

 tended by 3 or 4 oblong or oblanceidate leaflets connate at base, the rays sometimes 

 divided : involucres very large, nearly half an iiuh long : flowers rose-colored, 2 or 



