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. 



Loes. — Squaw Greek, Placer Co., Sonne; Donner, Kellogg; Webber Lake, Lemmon. 



Refs. — Eriogonum torreyanum Gray; T. & G. Proc. Am. Acad. 8: 158 (1870), type loc. 

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



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

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

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

 woolly-flocculent ; petioles long, mostly 1 to 21,0 times length of blade ; bracts 

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

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

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

 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 I/3 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 6.567; w. Siskiyou, Jep.ion 2095; Castle Peak, n. e. Mendo- 

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

 June- Aug. 



Ref. — Eriogonum compositum Dougl.; Benth. Bot. Reg. t. 1774 (1S36), type loe. Colimibia 

 River, Dnuglax. 



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

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

 bases and cro^vned with a tuft of silvery white leaves ; herbage densely white- 

 woolly; leaves roundish, oval or ovate, i/o to % or ly^ inches long, narrowed 

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

 the tips of the peduncles; raj's 3 to 6. lA to 114 inches long (or reduced and 

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

 broadly eampanulate, 3 to 5 lines long; calyx white, fading pinkish, naiTowed 

 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 

 (Tosemite Pai-k to Nevada Co.) and inner North Coast Range, 7000 to 9500 

 feet. Western Nevada near Lake Tahoe. 



Loes. — Mt. Conness, Hutrhings ; Lambert Dome, Jei)son 3249; Rancheria Mt., Jepson 

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

 Heller 7011; high peaks near Sierra Valley, Lemnwn; Placer Co., Carpenter; South YoUo 

 BoUy, Jepson; mts. north of Clear Lake, Mackie. 



Ref. — Eriogonum lobbii T. & G. Proc. Am. Acad. 8: 162 (1S70), based on Lohb 190 

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

 Virginia City, Nov.). 



59. E. pyrolaefolium Hook. Peduncles scape-like, glalu'ous. 2 to 3i/_> inches 

 high, arising from a densely leafy caudex; leaves roundi.sh or oval, thick, 

 glabrous, 4 to 12 lines long, abruptl.v petioled, the petioles villous ; \imbels 

 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 glal>rous; upper part of ovary 

 densely hairy. 



High northern peaks ; ]\It. Lassen ; Mt. Shasta. North to ilt. Rainier. 

 Ref. — Eriogonum pyrolaefolium Hook. Jour. Bot. & Kew Misc. 5: 395, pi. 10 (1853), 

 type loc. Mt. Shasta, Jeffrey. 



