November 17, 1909 1 j 1 



Lupinus dispersus 



Annual (section Platycarpos), nearly acaulescent, depressed 

 or prostrate, only the early petioles and peduncles erect, the 

 plant with a spread of 3 to 10 cm., densely white villous through- 

 out except the glabrous upper surface of the leaflets: petioles 

 often purple, up to 3 cm. long; stipules green, somewhat ascend- 

 ing, 4 or 5 mm. long in larger plants: leaflets 7 or 8, oblanceo- 

 late, rounded and obtuse at the apex, 1 cm. long, 4 mm. wide at 

 the top: peduncles and inflorescence rarely equalling the leaves, 

 the former only a little longer than the short and dense ra- 

 cemes: bracts linear-lanceolate, purplish, about 3 mm. long: ped- 

 icels very short and stout, batch' 1 mm. long: upper calyx lobe 

 less than 2 mm. long, 2-parted almost to the base, the divisions 

 with a broad somewhat U-shaped sinus; lower lobe nearly 4mm. 

 long, prominently 2-toothed, the sinus narrow; the lobes with a 

 bractlet in each sinus; flowers violet blue when fresh, fading 

 yellowish, 6 mm. long, about 4 mm. deep; banner with the edges 

 reflexed in the upper half only, the face grooved, oblong-ovate 

 when spread out, 4 mm. wide; wings moderately inflated, nearly 

 oblong, 2 mm. wide, slightly obliquely rounded below the apex; 

 keel moderately curved dorsally from elbow to apex, the inner 

 edges nearly straight: pods ovate, 1 cm. long, 6 mm. wide, more 

 or less white-villous, 2-seeded, the seeds somewhat lenticular in 

 shape, 2 mm. across, whitish, smooth. 



The type, deposited in the herbarium of the Nevada Agri- 

 cultural Experiment Station, is my no. 9643, collected May 17, 

 1909, at Rnyolite, Nye county, Nevada, at the northeastern base 

 of L,add mountain growing in sand, elevation t,S75 ^ect. It is 

 apparently scarce there, as only a few plants were found. The 

 species is evidently related to L. brevicaulis. It is distinguished 

 by the very characteristic calyx, with the green upper lobe 

 parted to the base and the sinus broad. The upper calyx lobe 

 is so obscured by the dense white pubescence that a hasty glance 

 will not reveal its true shape. 



Besides the type only one other specimen from Nevada has 

 been examined. It is Goodding 942 in part, collected in Mead- 

 ow Valley Wash at Caliente, Lincoln county, mixed on sheet 



