rOLYGONE^. 143 



hractlets. Perianth 6-cleft or -parted, colored, enclosing the achene. 

 vStamens 9, upon the base of the perianth. Styles 3 ; stigmas capitate. 

 Achene 3-angled, rarely 3-winged. Embryo in all Californian species 

 more or less lateral and incnrved ; cotyledons foliaceoiis, mostly shorter 

 than the radicle. 



* Pereintials, nfte)i iroodi/ ai haxe; inrolucre^ nmhrllnle (rarely solilaryj 



at swnmit of naked or leafy-hracted scape-like peduncles, iurbinaie, 4 — ^- 



looihed or lobed; perianth riarroived. to a slender stipe-like base; 



filamenls pubescent beloir.-'EB.ioGO'HVM proper. 



■i— Involucres deeply lobed, the lobes becoming rejiexed. 



++ Peduncles erect from a branched woody base; umbel simple 



or compound. 



1. E. tripoduiii, Greene, Pittonia, i. 39 (1887). Leaves linear-spatu- 

 late, 1 in. long, inchidiug the short petiole, revolnte, tomentose on both 

 sides : peduncles slender, 1 ft. high, bearing a whorl of leaves above 

 midway and these parted into al)out 3 elongated and nearly erect rays, 

 of which two bear a whorl of bracts in the middle, the third being naked; 

 each ray with a single involucre at summit : perianth yellow, densely 

 villous, less than 2 lines long, abruptly narrowed to a very short stipiti- 

 form base. At Hough's Springs, Lake Co., Mrs. Curran. 



2. E. umbellatuiii, Torr. Ann. Lye. N. Y. ii. 241 (1828). More or less 

 tomentose when young, the upper surface of the leaves, or sometimes 

 the whole plant, glabrate in age : leaves obovate- to oblong-spatulate, 

 1 — 2 in. long, on a slender petiole : peduncle 6—15 in. high, naked, bear- 

 ing a simple umbel of naked rays subtended by a whorl of leaves : 

 lobes of the involucre shorter than the turbinate tube : fl. yellow, often 

 reddening in age, 2 — 3 lines long, tapering gradually to the long stipe- 

 like base : filaments very hairy. — At considerable elevations in the 

 Sierra, from Mt. Dana northward ; one of the most common and widely 

 dispersed species of the genus, originally discovered in the Rocky Moun- 

 tains, where it is more plentiful than in California. The two following 

 seem to have been more or less confused with it. 



3. E. speciosuin, Drew, Bull. Torr. Club, xvi. 152 (1889). Habit 

 and foliage of the preceding, but all the parts larger, the petioles 

 shorter : umbel bearing 2 — 4 elongated rays which are usually again 

 divided, all the nodes leafy-bracted : involucre small, the lobes acute : 

 fl. numerous, bright yellow tinged with purple, % ^^- long, including the 

 slender stipe-like portion : filaments slightly hairy. — Gravelly banks of 

 the South Fork of Trinity River, in the Hyampum Valley, Chesnut A- 

 Drew. Also doubtless along the upper Sacramento, where it may have 

 passed for E. umbellalum. July. 



4. E. Tolinieanniii, Hook. Fl. ii. 134(1840): E. umbellatuiu, var. 



