410 POLYGONACEAE 



meuts ovate, the margin in age saeeate-dilated on each side of the cordate base, 

 the inner segments liuear-spatulate, finally exceeding the outer. 

 Colorado Desert, north to Liyo Co. East to Arizona and Utah. 



Locs.— Calexico, Abrams 3152; Chuckawalla Spr., Hall 5899; Coacliella, Hall 5812. 



Refs.— Ebiogonum thomasii Torr. in Pae. R. Rep. 5=: 364 (1857), type loc. Ft. Yuma, 

 Major Thomas. E. minutifloriim Wats. Proc. Am. Acad. 26: 125 (1891), type loc. Colorado 

 Desert, Orcutt, Apr. 1890, the segments less strongly saccate, otherwise the same. 



E. DESEBTICOLUM Wats. Proc. Am. Acad. 2(j; 125 (1891). type loc. s.w. Colorado Desert, 

 Orcutt 2189. Calyx yellow, villous. Very obscure; collected only once. 



15. E. thurberi Torr. (Fig. 75.) Stems 1 

 or several from the ba.se, diffusely and trichot- 

 omonsly branched, 4 to 13 inches high, tomen- 

 tnlose towards the base; leaves in a basal rosii- 

 late cluster, ovate to broadly oblong, woolly 

 below, less so above, I/2 to 2 inches long, the 

 petioles about as long or longer; peduncles in 

 the forks and terminal, 2 to 12 lines long; 

 involucres 1 line long, nearly hemispherical; 

 calyx rose-red or white, 14 to 34 ij^e long; 

 outer calyx segments roundish or transversely 

 elliptic, abruptly narrowed to a broad claw, a 

 floe of wool at summit of claw; inner calyx 

 Fig. 75. Eriogonum thurberi Torr. segments narrowly linear or lanceolate, some- 



o, flowering branehlet, xl;0, iiiiiiii,j i, 1/ -j 



flower X 10 1 ' > -what hastatelv lobed near base, 14 3-s wide as 



outer segments. 

 San Bernardino Valley south to San Diego C'o. and Lower California, east 

 to Arizona. 



Locs. — San Bernardino Valley, Parish, Jepson 5563 ; Palm Canon, Mt. S.an Jacinto, Jepson 

 1401 ; Temecula River, Jtpson 1553. 



Refs. — Eriouonum thurberi Torr. Bot. Mex. Bound. 176 (1859), type loc. San Pasqual, 

 San Diego Co., Thurher. Var. parishii Gand. Bull. Soc. Roy. Bot. Belg. 42: 198 (1905), type 

 loc. San Bernanlino, Parish 2820. 



16. E. cernuum Nutt. Stems glabrous, glaucous, diffusely di- or tri-choto- 

 mously branched, 6 to 14 inches high; leaves round to oval, white woolly 

 below, glabrate above, 6 to 9 lines long, the petioles nearly as long; pedicels 

 deflexed, i/o to 4 (or 7) lines long, somewhat racemose on the branches; in- 

 volucres narrowly turbinate ; calyx white, glabrous, % to 1 line long, narrowed 

 to a shortly clavate base, its segments obovate or somewhat quadrate, undu- 

 late, refuse, the inner half as broad. 



Colorado Desert (Warren's Well, Brandcgee). North to Nevada and Ore- 

 gon, east to the Rocky Mts. 



Ref. — J]riogoxum cernuum Nutt. Jour. Acad. Phila. ser. 2, 1: 162 (1848). types from 

 Columbia River plains and in the Rocky Mts., Nuttall. 



17. E. nutans T. & G. Similar to E. cernuum but pedicels glandular; base 

 of calyx very obtuse (attenuate in E. cernuum). 



Northwestern Nevada. La.ssen Co. ace. Bot. Cal. 2 : 23. 



Ref. — Eriogonum nutans T. & G. Proc. Am. Acad. 8: 181 (1870), type spnis. from Lassen 

 Co. and n.w. Nev. 



18. E. watsonii T. & G. Similar to E. cernuum ; stem sometimes a little in- 

 flated; branches erect; leaves round-cordate; pedicels divaricately spreading, 

 1 to 4 lines long; eal.yx segments oblong, subcordate at base. 



Lockwood Valley, Mt. Pinos, Dudley & Lamb 4683; thence easterly to 

 Nevada. An ill-defined species so far as the Californian material is concerned, 

 apparently passing into E. deflexum. 



Locs. — Tehaehapi. Stokes; Walker Pass, Brandegcc. 



Refs. — Eriogonum watsonii T. & G. Proc. Am. Acad. 8: 182 (1870), type loc. Humboldt 

 Mts., Nev. E. baratum Elmer, Bot. Gaz. 39: 52 (1905), type loc. betw. Griffin and Mt. Pinos, 

 Elmer 3593. 



