BUCKWHEAT FAMILY 423 



with green midribs, often fading pinkish, glabrous, 1 to iy 2 lines long; outer 

 calyx segments elliptical, subcordate at base, their margins quite free and 

 distinct to base, the inner broadly spatulate ; filaments hairy at very base. 



Granite peaks and ridges, Sierra Nevada, 9000 to 12,000 feet. North to 

 British Columbia and east to the Rocky Mts. 



Locs. Kearsarge Pass, Jepson 899; Mono Pass, Jepson 4465; Lambert Dome, Jepson 

 3248; Lake Eleanor, H. W. Turner; Castle Peak, Nevada Co., Heller 7081; Snow Mt., Lake 

 Co., K. Brandegee. 



Var. vineum Jepson n. comb. Involucres vase-shaped, constricted near the 

 top ; calyx wine-red, 2y 2 to 3 lines long, its segments unequal. High montane, 

 California to Washington. Little known to us. 



Var. nivale Jones. (Fig. 80b, c.) Head small and compact, appearing like a 

 single involucre ; flowers red ; outer calyx-segments obovate ; filaments hairy 

 or glabrous. Southern Sierra Nevada. 



Locs. Tower Peak, Jepson 4548; Mt. Dana, Chesnut <$ Drew; Mt. Whitney, Jepson 1087, 

 Hall 4' BabcocTc 5530; Army Pass, Jepson 5064; Olancha Peak, Purpus. 



Eefs. ERIOGONUM OVALIFOLIUM Nutt. Jour. Acad. Phila. 7: 50, pi. 8, f. 1 (1834), type 

 loc. headwaters of the Missouri, Wyeih. Var. VINEUM Jepson. E. vineum Small, Bull. Torr. 

 Club, 25: 45 (1898), type Iocs. Rose Mine, San Bernardino Mts., Parish 3170, and Powder 

 Eiver Mts., Ore., Cusiclc. Var. NIVALE Jones, Contrib. 11: 8 (1903). E. nivale Canby, 

 Contrib. U. S. Nat. Herb. 4: 187 (1893). In material of E. nivale from type locality 

 (Siberian Pass, Hall $ Babcock 5481) the involucres appear, as said in original description, 

 to be solitary, but examination reveals 3 or 4 involucres so closely crowded in a deeply 3 or 

 4-parted primary involucre or whorl of bracts as to appear like a single involucre. This 

 form is doubtfully of even varietal value. 



49. E. proliferum T. & G-. Stems erect, naked, scape-like, 4 to 7 inches 

 high, bearing an umbellate inflorescence and arising from a compactly branched 

 caudex with very short leafy branches; herbage tomentulose, the leaves 

 densely white-woolly ; leaves ovate, mostly obtuse, 4 to 12 lines long, on petioles 

 as long or longer; umbels with 3 rays from beneath the sessile central invo- 

 lucre ; rays % to 2 inches long, somewhat unequal, bearing a cluster of 2 or 3 

 involucres, or one or more of the rays again shortly 3-radiate; involucre 5- 

 toothed, the teeth large, almost hooded ; calyx white, 2 to 2y 2 lines broad, the 

 outer segments roundish quadrate or elliptic (nearly as broad at base and 

 apex as at middle), attached by the lower % of the midnerve, the sides 

 free and overlapping; inner segments obovate, narrowed to a claw-like base. 



Northern Sierra Nevada to Siskiyou Co. ; north to British Columbia and east 

 to the Rocky Mts. 



Loes. Sierra Valley, Lemmon; Yreka, Butler 970, 1417; Little Shasta Valley, Hall $ 

 BdbcocTc 4099; Scott Valley, Jepson 2196; Marble Mt. region, Butler 211. 



Refs. ERIOGONUM PROLIFERUM T. & G. Proc. Am. Acad. 8: 164 (1870), type loe. Colum- 

 bia River region. E. greenei Gray, Proc. Am. Acad. 12: 83 (1876), type loc. Yreka, 

 Greene. E. dichotomum Wats. Bot. Cal. 2: 26 (1880), not Dougl. E. ovalifolium var. 

 proliferum Wats. Proc. Am. Acad. 12: 263 (1877). 



E. ANSERINUM Greene, Pitt. 4: 320 (1901), type loc. Goose Lake, Modoc Co., E. M. 

 Austin. Inflorescence narrow and fastigiate; calyx greenish yellow (ex char.). 



III. SUBGENUS Eueriogonum. 



Involucres turbinate, 4 to 8-toothed or -lobed, either solitary or borne in umbels, the umbels 

 sometimes congested in heads; bracts foliaceous; calyx stipe-like at base, often accrescent, 

 filaments mostly hairy or pubescent at base; flowering stems (peduncles) scape-like; per- 

 ennials; mountains from middle altitudes to alpine summits. 



50. E. caespitosum Nutt. Dwarf, matted, the scape-like peduncles slender, 

 naked, 2 to 4 inches high, bearing a single involucre; leaves white-tomentose, 

 oval to oblong-spatulate, 2 to 3 lines long, the petioles % to as long ; involucral 

 lobes linear, as long or longer than the turbinate tube ; calyx yellow or fading 

 reddish. 1 to ~Ly 2 lines long, in age nearly twice as long, hairy on the mostly 

 stipe-like base; filaments pilose; ovary glabrous. 



