426 POLYGONACEAE 



56. E. torreyanum Gray. Habit of E. umbellatum but stems and leaves 

 glabrous; outer rays of the umbel with a whorl of bracts midway; leaves 

 obovate, thickish, about 1 inch long, narrowed below to a petiole as long; 

 involucral lobes sparingly pubescent ; calyx yellow, 4 to 5 lines long ; filaments 

 hairy below. 



Northern Sierra Nevada, 5000 to 7000 feet. This seems to be only a glabrous 

 form of E. umbellatum. 



Locs. Squaw Creek, Placer Co., Sonne; Donner, Kellogg; Webber Lake, Lemmon. 



Eefs. ERIOGONUM TORREYANUM Gray; T. & G. Proc. Am. Aead. 8: 158 (1870), type loc. 

 Donner 's Pass, Torrey 443. E. umbellatum var. torreyanum Jones, Contrib. 11: 5 (1903). 



57. E. composition Dougl. Scape-like stems stout, 6 to 16 inches high from 

 a simple short caudex, glabrate; leaves oblong-ovate or deltoid-ovate, cordate 

 at base, l 1 /^ to 2 inches long, with a close white felt beneath, green above or 

 woolly-flocculent ; petioles long, mostly 1 to 2y 2 times length of blade; bracts 

 linear or oblanceolate ; umbel 6 to 10-rayed, the rays sometimes with a black- 

 ish band at middle, y 2 to 2 inches long, each bearing a capitate cluster of 1 

 to 5 involucres or a several-rayed umbellet; involucre broadly turbinate, 

 woolly, 8-toothed, the teeth short, acute ; calyx cream-color or yellow, glabrous, 

 contracted to a stipe-like base, 2 to 4 lines long; segments elliptic, the inner 

 becoming % longer in age ; filaments short hairy at base. 



North Coast Ranges. Far northward to Washington. 



Loes. Napa Range (near Calistoga) and Snow Mt. (Lake Co.), K. Brandegee; Long 

 Valley, Mendocino Co., Bolander 6567; w. Siskiyou, Jepson 2095; Castle Peak, n. e. Mendo- 

 cino Co., Jepson; Siskiyou Co., Butler 201 (Independence Creek) and 720 (Klamath Eiver). 

 June-Aug. 



Ref. ERIOGONUM COMPOSITUM Dougl.; Benth. Bot. Reg. t. 1774 (1836), type loc. Columbia 

 River, Douglas. 



58. E. lobbii T. & G. Peduncles lying along the ground, 2 to 7 inches long, 

 borne on a densely leafy stout caudex; caudex crowded below with old leaf- 

 bases and crowned with a tuft of silvery white leaves ; herbage densely white- 

 woolly; leaves roundish, oval or ovate, % to % or l 1 /^ inches long, narrowed 

 to rather broad petioles y 2 to as long ; umbels simple, bracteate, ascending from 

 the tips of the peduncles; rays 3 to 6, % to iy 2 inches long (or reduced and 

 then the umbels capitate), usually with a whorl of bracts at middle; involucres 

 broadly campanulate, 3 to 5 lines long; calyx white, fading pinkish, narrowed 

 at base but not stipe-like, 3 to 4 lines long; filaments pilose on lower half. 



Gravelly drifts and glaciated granite slopes and ridges, Sierra Nevada 

 (Yosemite Park to Nevada Co.) and inner North Coast Range, 7000 to 9500 

 feet. Western Nevada near Lake Tahoe. 



Locs. Mt. Conness, Hutchings; Lambert Dome, Jepson 3249; Rancheria Mt., Jepson 

 4589; Macomb Ridge, Yosemite Park, Jepson 8572; Bierstadt Peak, Davy 3226; Donner Pass, 

 Heller 7011; high peaks near Sierra Valley, Lemmon; Placer Co., Carpenter; South Yollo 

 Bolly, Jepson; mts. north of Clear Lake, MacTcie. 



Ref. ERIOGONUM LOBBII T. & G. Proc. Am. Acad. .8: 162 (1870), based on Lobb 190 

 (probably northern Sierra Nevada), Torrey (mts. near Donner Pass), and Stretch (near 

 Virginia City, Nev.). 



59. E. pyrolaefolium Hook. Peduncles scape-like, glabrous, 2 to 3^ inches 

 high, arising from a densely leafy caudex; leaves roundish or oval, thick, 

 glabrous, 4 to 12 lines long, abruptly petioled, the petioles villous; umbels 

 small, bearing 1 to 3 involucres on short (1 or 2 lines long) rays or quite 

 capitate; bracts 2, linear or spatulate, elongated; calyx red, not attenuate 

 at base, 1% to 2 lines long, somewhat glandular inside, hairy at base outside 

 and on midribs half-way up segments ; filaments glabrous ; upper part of ovary 

 densely hairy. 



High northern peaks: Mt. Lassen; Mt. Shasta. North to Mt. Rainier. 

 Ref. ERIOGONUM PYROLAEFOLIUM Hook. Jour. Bot. & Kew Misc. 5: 395, pi. 10 (1853), 

 type loe. Mt. Shasta, Jeffrey. 



