154 



POLYGONACEJE. 



usually somewhat pubescent on the inner lobes. — Napa Co., and 

 northward. 



. 5. E. Wrightii Torr. var. trachygonum. Woody base much 

 branched, the branches erect, very leafy and 6 to 11 in. high; leaves 

 obovate or oblanceolate, acute, white-tomentose on both faces, short- 

 petioled, 3 to 6 lines long, often with smaller ones fascicled in the 

 axils, or the lowermost twice as long with longer petioles; inflores- 

 cence short-peduncled, once or twice dichotomous, the branches erect; 

 lower involucres scattered, the upper approximate, campanulate- 

 tubular, prominently but obtusely angled and woolly between the 

 angles; flowers 2J lines broad; sepals white with a green midrib, the 

 inner longer than the outer. — (E. trachygonum Torr.) 



Dry gravel beds of interior streams from Putah Creek, Jepson, 

 south wai*d to the Mt. Diablo range, Brewer, and about Mt. Hamilton, 

 Greene. Sept.-Oct. 



6. E. saxatile Wats. Tomentose throughout, becoming floccu- 

 lent, 8 to 16 in. high, the base of the peduncles or caudex densely 

 leafy; leaves roundish, both sides with a dense, often felt-like 

 tomentum, 3 to 8 lines broad, short-petioled; peduncle 3 to 5 in. high, 

 the branches of the inflorescence short and spreading; bracts (espe- 

 cially the lower) subfoliaceous, triangular or oblong, acute; involucre 

 1^ to 2 lines long, its teeth acute; flowers yellowish or rose-tinted, 2 

 lines long; sepals all spatulate-oblong and carinate, about equal. 



Southern California northward to Mt. Hamilton, acc. to Greene. 

 July. 



7. E. truncatum T. & G-. Slender thinly tomentose annual 1 ft. 

 high, with many stems from the base; leaves obovate or oblong- 

 oblanceolate, with undulate margin, 1 in. long, attenuate to a 

 slender petiole usually quite as long; peduncle short, bearing a leafy- 

 bracted umbel-like inflorescence of 4 to 6 elongated rays, which are 

 loosely once or twice di- or tri-chotomous; bracts nearly minute; in- 

 volucres solitary or 2 to 4 in a cluster, tomentose, oblong-turbinate, 

 2 lines long; flowers light rose-color, 1 line long. 



Drv foothills east of Mt. Diablo, where first collected by Brewer. 

 May"29, 1862. 



8. E. gracile Benth. Floccose-tomentose throughout, somewhat 

 strict and narrowly panicled, or more diffuse, 5 to 11 in. high; leaves 

 oblanceolate or broadly oblong, attenuate to a slender petiole, 1 to \\ 

 in. long or less, tomentose on both sides or less so above; bracts more 

 or less elongated or somewhat foliaceous; involucres 1 line long or 

 less, broader above, with rigid acute, and rather prominent teeth, 

 often dark brown; flowers white, rose-color or yellowish, £ line 

 long. 



Dry plains or valleys; Solano Co., and southward. 



9. E. vimineum Dougl. Glabrous or at least not tomentose, 

 unless at the very base, erect, 9 to 18 in. high, much branched from 

 near the base, the branches elongated and virgate, with the lower 

 commonly in whorls of 4 or 5; lower forks often leafy; leaves orbic- 



