BUCKWHEAT FAMILY 423 



with green midribs, often fading pinkish, glabrous, 1 to I14 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 ("olumbia and east to the Rocky Mts. 



Loes. — Kearsarge Pass, Jepson 899; Mono Pass, Jepson 4465; Lambert Dome, Jepnon 

 3248; Lake Eleanor, E. W. Turner; Castie 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. 2io to 3 lines long, its segments unequal. — High montane, 

 California to WMshington. 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 4.54S ; Mt. Dana, Chesiiiif 4- Drew; Mt. Whitney, Jepson 1087, 

 Hall 4' Babeoek 5330; Army Pass, Jepson 5064; Olancha Peak, Fnrpus. 



Rofs. — Ekiogonum ovalipolium Nutt. .lour. Acad. Phila. 7: 50, pi. 8, f. 1 (18.34), type 

 Inc. headwaters of the Missouri, Wyeih. Var. vineum .lepsou. £. vineum Small, Bull. Torr. 

 ('lull, 25: 45 (1898), type locs. Rose Mine, San Bernardino Mts., Parish 3170, and Powder 

 Eiver Mts., Ore., Cusiek. Var. NIV.\LE .Tones, Contrib. 11: 8 (1903). E. 7iivale Canby, 

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

 (Siberian Pass, Hall 4' Babeoek 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 priniarj- 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 J/, 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 2i4 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 Vallev, Hall 4" 

 Babeoek 4099; Scott Valley, Jepson 2196; Marble Mt. region, Bittler 211. 



Refs. — Eriooonum proliferum T. & G. Proe. Am. Acad. 8: 164 (1870), type loc. Colum- 

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

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

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



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

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



in. — Subgenus Eueriogonum. 



Involiicres 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 ol)long-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 li/> lines long, in age nearly twice as long, hairy on the mostly 

 stipe-like base: filaments pilose; ovary glabrous. 



