74 Muhlenbergia, Vohime "Z 



addition lateral branches about equalling the leaves. It is a 

 relative of L. brevicaulis^ but that has "deep blue" flowers, the 

 parts all but the keel differing in shape, and that is glabrous, 

 while in ours it is bearded near the base. 



Lupinus Iiorizontalis 



Annual, section Platycarpos: diffuse, large plants about 

 12 cm. high, 2 dm. across: herbage pubescent with short spread- 

 ing hairs, or more nearly villous above on calyx, bracts, etc.: 

 branches several, all floriferous, more or less dichotomous, the 

 lowest ones horizontal, the ones above them more ascending, the 

 middle ones erect: petioles variable, the longest about 6 cm., 

 rather stout, wider at the base; stipules narrowly lance-linear, 

 2 mm. long, adnate for 5 mm. or less; leaflets 7-9, oblanceolate, 

 1.5 cm. long, 5 or 6 mm. wide, rounded and obtuse: peduncles 

 and inflorescence of varying length, the whole usually equalling 

 or a little exceeding the leaves: membranous bracts about 3 mm. 

 long, acuminate from a triangular base nearly 2 mm. wide: ped- 

 icels short, barely 2 mm. long: lower lobe of the calyx green, 

 pubescent with somewhat tangled hairs, ovate-lanceolate, 6 mm. 

 long, over 3 mm. wide at base, barely acutish, the apex minutely 

 2-toothed; upper lip ovate, membranous, barely 2 mm. long, 

 cleft nearly to the base, the lobes lanceolate with rather wide 

 sinus, villous and ciliate: flowers pale violet-blue, whorled and 

 crowded, eqalling or exceeding the internodes, erect, i cm. long, 

 7 mm. across; banner plane or only slightly turned back, with a 

 prominent midvein; wings joined only near the apex, the open- 

 ing narrowly elliptical, 2 mm. wide, slightly exposing the keel, 

 this not much curved, ciliate on the lower third, 2 mm. wide for 

 three fourths the length, then gradually narrowed to the sharp 

 apex which protrudes a little from the wings: pods obliquely 

 o\ate, acute, 12 mm. long, 6 mm. wide, somewhat pubescent 

 with long tangled hairs: seeds nearly 3 mm. across, marked with 

 small dark spots. 



