BUCKWHEAT FAMILY 



409 



petioles y 2 to 2 times as long ; pedicels racemose and in the forks, divaricately 

 spreading, 4 to 10 lines long; involucres 3 to 7-flowered, glabrous, turbinate. 

 5-toothed, y 2 line long, in age crowded with linear or oblong bractlets; calyx 

 yellowish, 1 line long, all the segments densely whitish hispid along middle of 

 back, the outer segments lanceolate, their edges revolute and thus becom- 

 ing linear-lanceolate, the inner segments triangular-lanceolate, with scarious 

 margins. 



Colorado and Mohave deserts, north to the San Carlos Range; east to Utah 

 and New Mexico. 



Loes. Coachella, Greata; east base Mt. San Jacinto, Hall 1834; Providence Mts., T. 

 Brandegee; Ludlow, Jepson 5509; Bandsburg, Heller 7693; Barstow, Jepson 4778; San Carlos 

 Bange, Lillis ; Keeler, Hall # Chandler 7172; Southern Belle Mine, Heller 8333. 



Eefs. ERIOGONUM INFLATUM Torr. & Frem., Frem. Eep. Sec. Exped. 317 (1845), type loc. 

 Mohave Desert, Fremont; Cov. Contrib. U. S. Nat. Herb. 4: 186 (1893). E. clavatum Small, 

 Bull. Torr. Club, 25: 50 (1898), type from n. Lower Cal., Orcutt. E. glaucum Small, 1. c. 51, 

 type loc. Colorado Desert, Orcutt. 



12. E. pusillum T. & G. Stems 1 or several from the base, 4 to 12 inches 

 high, trichotomously branched at or from below the middle, glabrous; leaves 

 ovate or rounded, 3 to 8 lines long, tapering at base into the petiole, flocculent- 

 tomentose below, less so above, the green bracts and involucres glandular- 

 pubescent; pedicels of the involucres glabrous, filiform, 4 to 14 lines long, in 

 all the forks of the trichotomous panicle and terminal ; involucre broadly tur- 

 binate; calyx yellow, the segments with red centres, minutely pubescent, 1 

 line long, the outer segments obovate, the inner oblong; filaments included. 



Mohave Desert and north to Inyo Co. Nevada. 



Locs. Little Bock Creek, Los Angeles Co., Davidson; Lancaster, Davidson; Victor, Jepson 

 5639; Calico Mts., Jepson 5394; Bandsburg, Heller 7685; Bishop Creek, Hall $ Chandler 7272; 

 Kernville, Brandegee. 



Bef. ERIOGONUM PUSILLUM T. & G. Proc. Am. Acad. 8: 184 (1870), type loc. foothills of 

 the Trinity Mts., Nev., Watson. 



13. E. reniforme Torr. & Frem. Stems 1 to several from the base, 2 to 6- 

 forked, forming a diffuse plant 4 to 7 inches high; herbage glabrous and 

 glaucous except the leaves and the slightly hairy lower internodes ; leaves all 

 basal, round-reniform or roundish, 5 to 11 lines broad, loosely white-woolly; 

 petioles y 2 to 2y 2 inches long; bracts glabrous but the margins loosely hairy; 



involucres glabrous, turbinate-campanulate, on pedicels 2 to 

 6 lines long ; calyx whitish or yellowish, minutely glandular- 

 puberulent, % line long, the outer segments ovatish or ellip- 

 tic, the inner broadly linear; filaments exserted. 



Inyo Co. south to the Mohave and Colorado deserts. Lower 



California. 



Locs. Owens Lake, Jepson 5118; Keeler and Panamint Valley, ace. 

 Coville; Ludlow, Jepson 5493; Barstow, K. Brandegee; Kramer, Jepson 

 5331; Victor, Jepson 5618; Twentynine Palms, T. Brandegee (involucres 

 scarcely lobed). 



Befs. ERIOGONUM RENIFORME Torr. & Frem.; Frem. Bep. Sec. Exped. 

 317 (1845), type from California, Fremont, probably on the Mohave 

 Desert; Cov. Contrib. U. S. Nat. Herb. 4: 188 (1893). E. praebens Gand. 

 Bull. Soc. Boy. Bot. Belg. 42: 196 (1905), Sierra Valley, Hillman. 



14. E. thomasii Torr. (Fig. 74.) Stems 1 or several from 

 the base, repeatedly and diffusely 2 to 8-forked, 4 to 8 

 inches high ; leaves in a basal tuft, roundish, sometimes sub- 

 cordate at base, 2 to 8 lines long, rather long-petioled, white- 

 Fig. 74. ERIOGONUM woolly or glabrate ; pedicels in the forks and terminal, 2 to 

 flower AS in arsis' 9 lines long ; involucres deeply 5-lobed, i/ 2 line long, glabrous; 

 x 12; &, flower^ calyx dull yellow, % to y 2 line long, in age whitish and 

 fruiting stage. twice as long, hispidulose outside at base, the outer seg- 



