52 Small : North American Polygonaceae 



like base, which is 2-2.5 mm. long; lobes spatulate to oblong- 

 obovate, the inner becoming markedly longer than the outer : 

 filaments copiously villous from above the middle to the base : 

 ovary sparingly pubescent at the top ; styles pubescent at least 

 below the middle : achenes about 5 mm. long, the beak fully as 

 long as the body, which is decidedly constricted at the base. 



The type was collected west of Ouray, Colorado, September 9, 



1 90 1, by L. M. Underwood, no. 177 b. The species is apparently 



common in Colorado and has been collected in two other States, 



viz. : 



Wyoming: Fort Bridger, July, 1873, Porter. Elk Mt, July, 



1899, Little & Stanton 171. Fort Steele, May and June, 1901, 



Tzveedy 4396. Copperton, June, 1901, Tzveedy 4395. Utah : 



Wasatch Mts., August, 1879, Jones 141 1 and August, 1900, 



Stokes. 



This species differs from its nearest relative, Eriogonum umbel- 



latum, chiefly in its longer and more slender-stalked calyx and 



glabrous or nearly glabrous leaves. 



J Eriogonum Tetraneuris sp. nov. 



Perennial (section Lachnogyna), silvery-gray and silky-tomen- 

 tose. Stems (caudices) tufted, very densely leafy, 1-4 cm. long, 

 the older portions thickly clothed with old dilated leaf-bases : 

 leaves crowded ; blades elliptic to oblong, 1-3 cm. long, acute or 

 acutish, paler and more densely pubescent beneath than above ; 

 petioles as long as the blades or shorter, ciliate and dilated below : 

 scapes 1-1.5 dm. tall, conspicuously more densely pubescent 

 near the top than below, simple or rarely branched, the branch 

 subtended by a leaf-like bract : involucres sessile, capitate, sub- 

 tended by lanceolate or triangular bracts, campanulate, about 3.5 

 mm. long, silky ; lobes ovate, obtuse, about one third as long as 

 the tube : calyxes lemon-yellow, about 6 mm. broad, silky with- 

 out ; lobes oblong or oblong-cuneate, the inner rather broader 

 than the outer : filaments sparingly villous at the base : ovary 

 densely pubestent ; styles glabrous : achenes not seen. 



Collected near Pueblo, Colorado, May 15, 1900, by P. A. Ryd- 

 berg & F. K. Vreeland, no. 6324. 



Related to Erigonnm laehnogynum but with capitate inflores- 

 cence, and in this resembling E. villiftoriim. The involucres are 

 slightly longer than those of E. laehnogynum and the calyx-lobes 

 are not contracted below the middle. The pubescence of the 



