I 



K^7 



1879, i<*^8o, Frank Tweedy; *^ Western Texas to El Paso, 

 New Mexico/' 1849, C. Wright, No. 99. 



Ar7i» Mcxtco, — 1847, A. Fendler, No. no; 185 1, C. 

 Wrig^ht; Santa Magdalena Mts.. 1881, G. R. Vasey; near 

 Silver City, 1880, Ed. L. Greene; '^ Leavenworth to El Paso," 

 F. A. Diffenderffer, Herb. Porter. '* Mexican Round. Sur- 

 vey/' Dr. C. C. Parry and others. No. 192. 



Kansas. — 1884, Dr. J. H. Oyster; Fort Wallace, 1867, 

 Dr. Wm. Bell; Ellis, 1874, L. Watson. 



Nebraska. — i^'iZ, Dr. Wilcox; Crowelton, E. H. Miller, 

 Herb. Wm. M. Canby. Dakota. — Herb. Phila. Acad. 

 Sciences; ''Prairies/' 1883, Herb. University of Minn; Plack 

 Hills, T887, Dr. W. H. Forwood; -Lit. Missouri River," 1882, 

 Wm. M. Canby. Arizona, — Lemmon; ** Rio Cienega, Plast 

 of Tucson," 1877, E. L. Greene, No. 1079; Willowspring, 

 1874, Dr. Rothrock, No. 207; Fort Verde, Dr. Mearns, No. 

 327; ''30 miles west of Bi<j Sprinj^/' 1883, Holstein. 



WasJiiJio'toiL — ** Columbia Plains," Nuttall. Lt. Beck- 



with's exped.. No. 64. Long's 1st exped.. Dr. James. ''On 



^^ * 



the Platte/' Dr. Le Conte. 



24. P. SCOPARIA, H. B. K. Nov. Gen. v., 399, (1821). 



P. scoparia, var. ////////Ww/zV, Gray, PI. Wright. 1.38,(1852). 



Steins, several or many from a thick rootstock, erect, 4'- 

 18' hig"h, straight or somewhat curved, irregularly branching, 

 glabrous or more or less puberulent; lea\'es alternate, subu- 

 late-linear, '}>^-&^ l<^'"*g' nearly erect; racemes }4''\}4' long; 

 bracts deciduous; flowers greenish- white; wings about i'^ h:)ng, 

 obowate or oval, narrowed below into a short claw; crest of 

 keel made up of a few filiform processes; stamens 

 eight In number; st\de short, open above and minutely auri- 



Fi 



culate between the stigmatic gland, which is provided with a 

 few minute hairs, and the sessile tuft, the appendage wanting; 

 mature capsule long-ovoid or oblong-ovoid, somewhat com- 

 pressed, about 2'^ long, usually provided with an indistinct 

 wing on one margin from base to tip, most easily seen near 

 the tip» the two cells usually unequal, the larger one being 



