BUCKWHEAT FAMILY. 133 



Dry foothills and middle elevations, common in both the Coast Ranges and 

 Sierra Nevada, ('ailed "Blood-root" iu Contra Costa Co. and gathered for 

 medicinal purposes. Var. oblongifolium Wats. Leaves broadly oblong, 1 to 

 l''o in. long, abruptly contracted to slender petioles 3 in. long; perianth usually 

 somewhat pubescent on the inner lobes. — Xapa Co. and northward. 



6. E. trachygonum Torr. Stems several to many, erect, 6 to 11 in. high, 

 very Leafy, from a much branched woody base; 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 ; inflorescence short-peduncled, once or twice dichotomous, the 

 branches erect; lower involucres scattered, the upper approximate, campanu- 

 late-tubular, prominently but obtusely angled and woolly between the angles; 

 flowers '2 1 o lines broad; sepals white with a green midrib, the inner longer 

 than the outer. — (E. wrightii Torr. var. trachygonum Jepson.) 



Dry gravel beds of the larger interior streams: inner Coast Eanges. 



7. E. saxatile Wats. Tomentose throughout, becoming flocculent, 8 to 10 

 in. high, the base of the peduncles or caudex densely leafy; leaves roundish, 

 both sides with a dense, often felt-like tomentuni, 3 to 8 lines broad, short- 

 petioled; peduncle 3 to 5 in. high, the branches of the inflorescence short 

 and spreading; bracts (especially 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, north in the Sierra Nevada to North Fork Kaweah 

 River and in the Coast Eanges to the Santa Lucia Mts. 



8. E. truncatum T. & G. Slender thinly tomentose annual 1 ft. high, with 

 many stems from the base; leaves obovate or obiong-oblanceolate, with undu- 

 late 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 elon- 

 gated rays, which are loosely once or twice di- or tri-chotomous; bracts almost 

 minute; involucres solitary or 2 to 4 in a cluster, tomentose, oblong-turbinate, 

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



Mt. Diablo region from Marsh's Ranch north to Antioch. 



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 obicular to broadly ovate, 3 to 10 lines broad, 

 greenish, reddish, or yellowish, white tomentose below; margin undulate, at 

 least in age; the petioles as long or longer; involucres very narrow, 1 line long; 

 flowers rather few, rose-color, or yellowish, 1 line long; outer sepals obovate, 

 inner oblong. 



art: Range hills, especially slopes near rocky outcroppings. Var. caxixum 

 Greene. Stems numerous from the base, repeatedly di- or at first tri-chotomous, 

 procumbent or very diffuse, sometimes erect and branching only above the 

 base; inflorescence and stems reddish; involucres mostly at the ends of the 

 short branches or sessile in the forks. — Oakland Hills; Marin Co. 



10. 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 1% ic. long or 

 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 



