BUCKWHEAT FAMILY. 



1 53 



tomentose on both sides or glabrate above; peduneles naked from a 

 diffusely branched woody base, the branches leafy, especially at the 

 ends; leaves obovate to oblanceolate, acute, \ to 1 in. long; peduncle 

 naked, 6 to 10 in. high, bearing an umbel of 2 to 4 usually elongated 

 and cymosely-divided rays; nodes and lateral rays all leafy-bracted; 

 lobes of the involucre nearly as long as the turbinate tube; flowers 

 yellow or yellowish, slightly tinged with red on the outside, 2 or 3 

 lines long. 



Sierra Nevada. Of infrequent occurrence in the Coast Ranges; 

 summits of Mt. Diablo, Mt. Hamilton, and Mt. San Carlos, south- 

 ward to Southern ( Jalifornia. 



2. E. compositum Dougl. Peduncles stout, 6 to 16 in. high 

 from a simple short caudex; leaves oblong-ovate, cordate at base, \\ 

 to 2 in. long, white-tomentose on the under side, the upper surface 

 green and merely woolly-flocculent; petioles long (1} to 4 in.); umbel 

 either simple or compound, the rays 6 to '.», \ to 2 in. long, each 

 bearing a short several-rayed umhellet, subtended by whorls of linear- 

 oblanceolate leaves; lobes of involucre short; flowers 2 to 4 lines 

 long, cream-colored or yellow. 



Mountains of Napa and Sonoma Cos. acc. to Greene; volcanic 

 rocks near Long Valley, Mendocino Co., Bolander^ and northward. 

 Hays often with a blackish band at middle. 



8. E. latifolium Smith. Stout, tomentose throughout, the indu- 

 rated caudex with short leafy branches; leaves 1 to 2 in. long, 

 oblong to ovate, obtuse or acute at apex, rounded or cordate at base, 

 rarely cuneate, the margin often undulate and upper surface glabrate 

 with under surface very densely woolly; petiole often margined; 

 peduncles erect or ascending, 5 to 12 in. high, very stout, not 

 fistulous; bracts triangular; involucres very many-flowered, crowded 

 into large heads which are either solitary and terminal or few in a 

 simple or nearly simple umbel; involucres tomentose, 2 lines long; 

 flowers glabrous, light rose-co'lor, \\ lines long; bractlets densely 

 villous-tomentose. 



Rocky or sandy places along the sea-coast from Humboldt Co. to 

 Southern California. June-July. 



4. E. nudum Dougl. Tall and slender, sparingly leafy at base, 

 mostly glabrous above; leaves broadly ovate or oblong, obtuse. .] to 2 

 in. long, cordate or abruptly cuneate at base, on slender petioles, 

 undulate, densely tomentose beneath, becoming glabrate above; 

 peduncle (fistulous and sometimes inflated) and the sparingly- 

 branched panicle a foot or two high, smooth; involucres 2 or 3 lines 

 long, glabrous or nearly so, usually 3 to in each cluster; flowers 

 glabrous or sometimes more or less villous, 1 to 1.} lines long, white or 

 reddish, sometimes sulphur-yellow. 



Common in both the Coast Ranges and Sierras, in the dry foothills 

 and at middle elevations. 



Var. oblongifolium Wats. Leaves broadly oblong, 1 to '2\ in. 

 long, abruptly contracted to slender petioles 3 in. long; perianth 



