BUCKWHEAT FAMILY 



425 



Fig. 81. Eriogonum umbell.^tum Tcnr. «, umbel, past antbesis, 

 X 1 ; b, flower, x 8. 



12 liiips long, on 

 petioles 14 to 14 as 

 long; umbel.s simple, 

 subtended by a whorl 

 of linear to obovate 

 bracts, its ra.ys 3 

 to 9 (rarely reduced 

 to 1), 5 lilies to 11/4 

 inches (or 3) long, 

 these and the bracts 

 soft - pubescent ; in- 

 volucre 8-lobed, the 

 lobes reflexed, nearly 

 as long as the tur- 

 binate tube, the tube 

 and throat crowded 

 with the tioccose- 

 woolly braetlets ; 

 flowers sulphur- yel - 

 low ; calyx glabrous, 

 gradually narrowed 

 into the long stipe- 

 like base, 2 to 3, or 

 in age 3 to 4 lines 

 long; filaments pilose 

 on lower half. 



Higher Sierra Nevada and Coast Ranges. 4000 to 9000 feet ; north to Wa.sh- 

 ington and east to the Rocky Mts. 



Locs. — Shasta River, Butler 9(38; Humbug Mt., Butler 215; near Mt. Shasta, Jepson; 

 King Creek, Lassen Co., Jepson 411.5; Portola, K. Brandegee ; Bear Valley, Nevada Co., 

 Jepson ; Lake Merced, Yosemite Park, Jepson 3183; Glacier Pt., Jepson 5643; near Mt. 

 Whitney, Jepson 936; Farewell Gap, Jepson 997; Trinity Smnmit, Jepson 2119; South Yollo 

 Bolly, Jepson. 



Var. stellatum Jones. Rays simple and l)earing a whorl of bracts at their 

 middle or usually forked and the secondary rays similarly bracteate. — San 

 Bernardino .Mts.; Sierra Nevada; vSiskiyou Co.; north to Washington. 



\'ar. bahiaeforme Jepson n. comb. Inflorescence freely and irregularly 

 branched. — Tchachapi region. 



Var. monocephalum T. & G. Dwarf mountain form with the umbel re- 

 duced to a single ray, that is, the peduncle naked or bracteate and bearing 

 a solitary involucre. — Range of the species but far less common. Snow Jit., 

 K. Brandcejcc : South Yollo Bolly, Jepson. 



Refs. — Eriogoxum umbellatum Torr. Ann. N. Y. Lvc. Nat. Hist. 2: 241 (1828), type loc. 

 Rocky Mts.; Benth. Trans. Linn. Soc. 17: 410, t. 18, fig. 2 (1837); Sitgreaves Exped. pi. 12 

 (1853). E. spcciosum Drew, Bull. Torr. Club, 16: 152 (1889), type loc. S. Fork Trinity 

 River, Hy-ani-pum Valley, Chesnut 4' Drew. E. dumo.<ium Greene, Pitt. 3: 199 (1897), type 

 loc. American Valley, Plumas Co., if. M. Austin, said to be a shrub 5 or 6 feet high. E. 

 Irirholomvm Small, "Bull. Torr. Club, 25: 43 (1898), type loc. Mt. Hamilton, Greene. E. 

 reclinatum Greene, Pitt. 5: 67 (1902), Sierra Nevada and adjacent Nev. (the peduncles 

 ascending). E. modocense Greene, 1. c. 68, type loc. Davis Creek. Modoc Co. E. smalliaiium 

 Heller, Bull. S. Cal. Acad. 2: 68 (1903), type loc. Mt. Sanhedrin, HiUer 5996. Var. stell.\- 

 TUM .Jones, Contrib. 11: 5 (1903). E. stellatum Benth. Trans. Linn. Soc. 17: 409 (1837), 

 type loc. interior of N. W. America, Douglas. E. croceum Small, Bull. Torr. Club. 25 : 43 

 (1898), based on Idaho and Oregon spnis. Var. bahhefokme .Jepson. E. stellatum var. 

 bahiaeforme Wats. Bot. Cal. 2: 20 (1880). E. ovatum Greene, Pitt. 5: 69 (1902), type loc. 

 Silver Lake, Lassen Co., Baler 4" Nutting. Var.MONOCEPiiALUM T. & G. Proc. Am. Acad. 8: 

 160 (1870), type loc. western U. S. 



