2Q POLYGONACE.E. Eriugonum. 



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

 ii. 241 & Sitgr. Eep. t. 12 ; iJenth. 1. c. 11 ; Torr. & Gray, 1. c. IGO. 



Var. monocephalum, Torr. & Gray, 1. c. A dwarf alpine or high-mountain 

 form, witlj ihc uiuIm^I rL'duced to a single ray, i. e. the naked or bracteate peduncle 

 bearing a solitary iuvuluere : leaves small. — E. 'Tolmieaimm, Ilook. Fl. Bor.-Am. 

 ii. 134'; Benth. L c. 



A common species in the mountains of Northern California and Oregon, and eastward to the 

 Rocky JMountains, at 6,000 to 10,000 feet altitude. 



5. E. Torreyanum, Gray. Glabrous throughout excepting the involucre-lobes : 

 leaves ul).)vau-- to oldong-spatulate, an inch or two long, rather thick: peduncles 

 stout, naked or rarely with a single leaf in the middle, G to 10 inches high, bearing 

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

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

 Torr. & Gray, 1. c. 158. 



In the Sierra Nevada, from Silver Mountain northward, Tormj, Kdlogrj, Lcinmon, etc. 



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

 and leafy: h-aves ovate-spatulate to oblanceolate : peduncle naked, 6 to 12 inches 

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

 repeatedly dfvided in a cymose manner; the nodes and lateral rays all leafy-bracted : 

 floAvers as in E. umbellatum. —Unn. Trans, xvii. 409 ; Hook. El. Bor.- Am. 11. 134, 

 t. 177. E. ellipticum, iS^itt. PI. Gambel. in Journ. Acad. Philad. n. ser. i. IGl. 

 i. pofi/mit/nnu. Benth. in DC. Prodr. xiv. 12 ; Torr. & Gray, h c. 158. 



■\'ar. bahi^forme. Inflorescence much branched ; leaves mostly small and often 

 densely tomentose on both sides. — E. jjolycmthum, var. bahia^forme, Torr. & Gray, 

 I. c. 159. 



In the mountains from Oregon to Southern California, chiefly in the Sierra Nevada more rarely 

 in Arizona and S. Utah {Anderson, Palmer, Wheeler) ; the variety near K.rt lejon (i/o»i Loth- 

 rock) and on Mt. San Carlos, Brewer. Distinguished from E. iimbcllatum j)nncipally by tlie 

 character of the inflorescence. 



E HERACLEOiDEs, Nutt. ; Torr. & Grav, 1. c. 3 59. A similar species, densely tomentose with 

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

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

 lute or nndulate ; umbel about 6- (1-11-) raye-l, sometimes simple, usually with some or all of 

 the rays once or rarely twice divi.led ; flowers olten smaller. — Prom the eastern part ot W asli- 

 ington Tenitory to Nevada and Utah, and may reach Northeastern California. 



^H- «. ^H- PerUnith r/Iahrous : j^edundes stout and naked, from a thick and short 

 sparingly hmiu-hed caudex : umbel usually comjiound : leaves large, broadly 

 ovate or oblong. 



7. E. compositum, Dougl. More or less white-tomentose : leaves very densely 

 tomentose bcnratli, ureener above, oblong-ovate, cordate at base, acute or acutish, 

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

 erect, i to U feet high, nearly glabrous : umbel of 6 to 10 more or less elongated 

 rays, each bearing a short several-rayed umbellet, subtended by whorls of Imear- 

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

 1. c. 11 ; Torr. & Gray, 1. c. 159. 



From Washington Territory to Idaho and Northern California ; on volcanic rocks near Long 

 Valley, ^lendocino County, Bolandcr. 



8. E. Lobbii, Torr. & Gray. Cespitose, the very thick caudex scarcely branched, 

 tomentose: leaves oval or rounded, | to 1| inches long on rather stout petioles, 

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

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

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

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



