polygone^;. 47 



abruptly narrowed to a slender petiole: peduncle 1 ft. high, mostly 

 rather loosely but widely branching, the branches often more or less 

 cymose-dichotomous: involucres rather remote, not always solitary, nar- 

 rowly tubular, very shortly toothed, tomentose except the prominent 

 ribs, these glabrous: fl. scarcely exserted, erect, not numerous, 1 line 

 long, white or rose-color; more or less densely villous on the outside. 

 Var. Jepsonii, Greene. Panicle ample, as broad as high, the dichoto- 

 mous branches widely spreading: involucres campanulate-tubular, very- 

 many-flowered, the pedicels exserted and recurved; fl. rose-red. — The 

 type, along Putah Creek; the variety, from Gate's Canon, near Vaca- 

 ville. Sept., Oct. 



++ ++ Involucres 1 — 1% lines long, usually turbinate. 



10. E. vimineum, Dougl. Seldom at all tomentose except on the 

 lower face of the ovate or orbicular slender-stalked leaves: peduncle 1 ft. 

 high, branched from near the base, the branches, slender and virgate: 

 involucres very naiTow and rather prismatic, the teeth very short: fl. few, 

 rose-color o» white, exserted; outer sepals obovate, the inner obovate- 

 oblong and only half as broad. — Sonoma Co. 



11. E. gracile, Benth. Slender, 1 — 2 ft. high, usually white-woolly 

 throughout: leaves rosulate or scattered, ovate, oblong or oblanceolate, 

 tomentose on both faces : panicle of few or many usually rather strict 

 and virgate very slender branches: involucres many-flowered, turbinate, 

 the 5 teeth stout, prominent, acutish: fl. white, rose-color or yellowish, % 

 line long ; outer sepals obovate, inner oblong. — Mt. Diablo Kange. 



-i— -i— Suffrutescent; stems leafy up to the base of the peduncles. 



12. E. trachygonnm, Torr. Woody stems erect, rather slender, 6 — 10 

 in. high, densely clothed with the living and dead leaves; these narrowly 

 oblanceolate, 1 in. long, narrowed to a slender petiole, the dense 

 tomentum persistent on both faces: panicle short-peduncled, 3 — 5 in. 

 high, twice or thrice dichotomous; lower involucres scattered, upper 

 more condensed, sessile, campanulate-tubular, prominently but obtusely 

 angled, glabrous except the woolly and obtusely toothed orifice: sepals 

 white with a green midrib, the inner longer and somewhat narrower than 

 the outer: ovary pubescent on the angles. — Abundant in dry gravel beds 

 along Putah Creek, and on Mt. Hamilton. 



13. E. saxatile, Wats. Caudex stoutish, sparingly branched, very 

 leafy, % — 1 ft. high: leaves obovate, obtuse, 6 — 8 lines broad, 1 in. long, 

 cuneate at base, short-petioled, densely tomentose on both sides : branches 

 of the inflorescence short, spreading: bracts subfoliaceous, triangular or 

 oblong and acute: involucres l%— 2 lines long; teeth acute: fl. rose- 

 colored, 2 lines long, the sepals all spatulate-oblong and carinate, about 

 equal, the inner appressed to the achene.— Near the summit of Mt. 

 Hamilton. 



