306 BOTANY. 



cle decompound, very open, 4^12' high ; involucres usually glabrate ; leaves 

 all radical— Involucres and flowers rather large for the species. Southern 

 California and .Nevada. Pah-Ute and East Humboldt Mountains ; 5-6,000 

 feet altitude ; July-September. (1,030.) Specimens from Truckee Desert 

 are taller (18') and branched from the base, but with very smaU flowers, the 

 involucre but ¥' long, and the yellow calyx even smaller, the mature ache- 

 nium exceeding the flower, the long beak minutely scabrous as in the ordinary 

 form. (1,031.) 



Ekiogonum Heeemanni, Dur. & Hilg. T. .4- G., I. c, p. 179. Annual, 

 very glabrous or perhaps glabrate, dichotomously very much branched ; invo- 

 lucres few along the short divaricate branchlets, short-campanulate, 1" long 

 and as wide, several-flowered, 2-3 times longer than the ovate-subulate 

 bracts, teeth 4-5, broad, rounded; bractlets chaflfy, glandular-ciliate, the 

 outer linear, the innermost filiform ; calyx glabrous, 2" long in fruit, outer 

 segments rounded, much larger than the oblong-spatulate inner ones ; beak 

 of the achenium minutely scabrous. — California, (Heerman;) sterile plains of 

 Western Nevada, (Torrey ;) Southern Utah, (Palmer.) The latter specimens 

 are 6' high, the branchlets rather stout and rigid, woolly tomentose ; lobes 

 of the involucre also pubescent ; calyx white, very small. 



Eeiogonum Plumatella, Dur. & Hilg. T. Sf O., I. c, p. 179. Annual, 

 floccose-wooUy, low, (3-8' ;) leaves radical, orbicular, long-petioled, white- 

 woolly beneath ; branches of the decompound panicle rather rigid, many- 

 flowered, either straight or twisted, at length becoming entangled ; involucres 

 very small, shorter than the flowers, campanulate, few-flowered, not exceed- 

 ing the bracts, appressed, scattered on the naked branchlets ; bractlets fili- 

 form, scarcely barbellate ; calyx white, rose-purple or yellowish, glabrous, 1" 

 long, the similar segments (the inner ones slightly narrower, scarcely longer,) 

 obovate-cuneiform and broadly refuse, quasi-pandurate from the incurving of 

 the margins at the middle ; achenium minutely scabrous above ; embryo much 

 incurved, the cotyledons accumbent. — Southern California, (Heermann ;) 

 Western Nevada. Carson Desert, West Humboldt Mountains, and Monitor 

 Valley ; 4-5,000 feet altitude ; June-September. (1,032.) 



Eeiogonum deflexum, Torr. T. Sf G., I.e., p. 181. (§ Pedunculata. 

 See Appendix, under EriogonecB.) Annual, rather stout, 1-2° high ; leaves 

 1-2' in diameter, radical, rounded, subcordate, floccose-woolly, long-petioled ; 

 branches of the glabrous effuse many-flowered panicle rigid, rushlike, usually 



