412 POLYGONACEAE 



21. E. gracile lieiith. Stems strictly branched and forming a narrow pan- 

 icle or more diffuse, V2 to 2i/> feet high; thinly tonientose throughout, be- 

 coming floccose ; leaves oblanceolate or broadly oblong, attenuate to a slender 

 petiole, 1/^ to 2 inches long, tomentose on both sides or less so above; bracts 

 more or less elongated, equaling nearly or quite the involucres, or the lower 

 somewhat foliaceous; involucres along the elongated branches, glabrous or 

 nearly so. barely exceeding the Ijracts and half concealed by them, % to 1 

 line long, cylindric-campanulate. the teeth acute, prominent, spreading; calyx 

 white, rose-color or yellowish, glabrous, %^ line long. 



Dry plains, valleys and low hills. Great Valley and Coast Kanges to South- 

 ern California. Lower California. 



Loes. — Witch Creek, Alderson ; Riverside, Zumbro; San Bernardino, Piiriah 3822; Los 

 Angeles, E. U. Palmer; Antelope Valley, Lyell ; Soledad, Congdon ; Lathrop, K. Brandegee; 

 Vaca Mts., Jepson. 



Befs. — Ebiogonum gracile Benth. Bot. Sulph. 46 (1844), type loc. San Pedro, Hinds; 

 Jepson, Fl. W. Mid. Cal. 1.54 (1901). E. afininum Greene. Pitt. 2: 165 (1891), type loe. Santa 

 Inez Mts,, 11. slupr. 



22. E. citharaeforme Wats. Stems 1 or several from the base, freely 

 branching. 1 to 3 feet high ; herbage thinly tomentose, glabrous or glabrate 

 above ; leaves in a basal rosette, or a few at the lower nodes, roundish to ovate, 

 % to 2 inches long, gradually or cordately contracted to a long winged petiole, 

 the wing crenulately toothed, attenuate downward; involucres turliinate, 1% 

 lines long. 



San Luis Obispo Co. east to the inner South Coast Ranges. A local and 

 indefinitely known species. Perhaps only a variety of E. virgatum. 



Ref. — Eriogonum cith.^raeforme Wats. Proc. Am. Aead. 23: 266 (1888), type loc. Baron 

 Sehroeder's Ranch, Santa Margarita, Lcnunon 1584. 



23. E. virgatum Benth. Tomentose throughout, stem slender, erect, simple, 

 or the few branches rather strict, 1 to 3 feet high ; leaves in whorls on lower 

 part of stem or rosulate at the base, oblanceolate (or obovate), 1/2 to 2 inches 

 long, on slender petioles, the margin usually undulate ; involucres 2 to 2i o lines 

 long, rather remote, tomentose, c.ylindric, truncate or nearly, the teeth minute ; 

 bracts lanceolate, shorter than the involucres; calyx glalirous, 1 line long, 

 white, buft'. sulphur-yellow or pink. 



Stream beds: Coast Ranges; Sierra Nevada, 500 to 5000 feet. 



Loes. — Quartz Valley, Siski3'ou Co., Butler 203; Hy-am-pum, Clicsnut <jr- Drew; Middle Creek, 

 Lake Co., Tracy 2358; Cloverdale, Jepson; Putah Creek, Jepson; Walnut Creek, Jepson; Los 

 Buellis Hills, Santa Clara Co., B. J. Smith; New York Falls, Amador Co., Hansen 163; San 

 Andreas, Jepson ; Croekers, Yosemite Park, Jepson 4636 ; Coulterville, Jepson ; Redwood Canon, 

 E. Fork Kaweah River, Jepson 1159; S. Fork Kaweah River, Culbertson 4404; Upper Grouse 

 Valley, Tulare Co., Jepson 4707; Tehachapi, Stol-es ; Grifiin, Ventura Co., Hall 6335. 



Refs. — Eriogonum virgatum Benth. in DC. Prodr. 14: 16 (1856), type from California, 

 Fremont. E. roseum Dur. & Hilg. Pac. R. Rep. 5-': 14, pi. 15 (1855), type loc. Pose Creek, 

 Kern Co., Heermann ; lower nodes of panicle leafy; flowers rose-red. 



2-1. E. molestum Wats. Habit of E. vimineum. glalirous and glaucous 

 above the white-woolly leaves; leaves roundish or cordate, crisped or undulate, 

 4 to 6 lines long; flowers white, % to 1 line long; involucres cylindric- 

 turbinate, 21/2 lines long; ovarj' scaberulous. 



San Gabriel, San Bernardino and San Jacinto mountains to San Diego. 



Var. davidsonii Jepson n. comb. Habit and foliage of E. molestum but 

 involucres only 13/4 lines long, c.vlindric-prismatic ; bracts more united and 

 cup-like. — San Gabriel Jits, to the San Jacinto Mts. 



Refs. — Eriogonum molestum Wats. Proc. Am. Aead. 17: 379 (1882), type spms. from 

 mountains of S. Cal. Var. davidsonii Jepson. E. davidsonii Greene, Pitt. 2: 295 (1892), type 

 loc. Wilson Peak, Davidson. 



25. E. vimineum Dougl. (Fig. 78b.) Stems 1 or several, glabrous wholly 

 or at least above the base, erect, 3 to 18 inches high, much branched from 



