1902] ROCKY MOUNTAIN PLANTS 23 



Eriogoxum ovaljfolium purpureum, n. comb. — Encycla pur- 

 purea Nutt. Jour. Acad. Philad. new ser. i : 166 ; DC. Prod. /. c, 



Eriogonum CRASsiFOLiUM Benth. Trans. Soc. Linn. Lend. 

 17 : 408 ; Hook. Fl. Bor.-Am. //. iy6, E. aurcum Nutt. in. DC. 

 Prod. 14 : 8. — This excellent species has for a long time been 

 wholly in eclipse, or at most has been accorded only varietal 

 rank. It is most abundant in the type locality, '* Scopulosis ad 

 regionem super, fl. Platte." It has several times been collected 

 by the writer and distributed as a variety of E, flavum Nutt. 

 Again collected in 1900 as no. 7285 in quantity, and will be dis- 

 tributed as a species, which it properly is. 



Eriogonum crassifolium tectum, n. var, — Densely tufted 

 with deep set woody roots, the crowns of the branched caudex 

 inordinately enlarged by the thick, closely sheathing, very 

 woolly leaf bases : leaves all crowded on the short crown, firm 

 and thick, densely tomentose, ovate to oval or more rarely 



oblong, 2-1'''^ long, on very short petioles (^^ to ^^ as long): 



scapes stout, about i ^"^ long: flower yellow, but the yellow 

 obscured by the long, dense, tomentose pubescence of the invo- 

 lucres and calyx-segments : inflorescence subcapitate, the rays 

 mostly shorter than the foliar bracts. 



The variety may readily be known by the remarkable protection against 

 desiccation and cold that is afforded the crowns of the caudex, and the whole 

 plant for that matter, b}^ the dense tomentum. That is a character of the 

 species, but in a small degree when compared with the variety. The shorter 

 petioles and rays and the thick, leathery leaves further distinguish it. The 

 species comes into blossom in June, while the variety in the same range not 

 till August, Only one no. of the variety is at hand, 2041, Sand creek, 

 Albany co., Aug. 8, 1896, on dry, sandy, eroded banks. 



Eriogonum fruticosum, n. n. — E, aiireum Jones, Contrib. to 

 W. Bot. 7:718 ; not £. aiireiim Nutt. DC. Prod. 14:8. 



Eriogonum fruticosum ambiguum, n. comb. — E, aureum 



ambiguum Jones, Contrib. to W. Bot. 7: 719. 



Eriogonum fruticosum glutinosum, n. comb.— i5. anreum 

 glutlnosum Jones, Contrib. to W. Bot, 7^719- 



Eriogonum laxifolium. — E. Ki?igii la xi folium T. & G. Proc. Am 

 Acad. 8; 165 ; E. chrysocephalum Gray, Proc. Am. Acad. 11: loi 



