LEGUMINOSiE. 275 



10. ASTRAGALUS, Linn. 



1. Astragalus lentiginosus, Dough in Hook. 



Hab. Near Fort Okanagan on the Upper Columbia. — Plant diffuse, 

 the branches 8 to 12 inches long. Leaflets 6 to 8 pairs, broadly obo- 

 vate, one-third of an inch in length. Spike densely capitate, about 

 three-fourths of an inch long and half an inch in diameter. Flowers 

 2 J inches long. Calyx villous with grayish hairs; the lanceolate- 

 subulate teeth nearly as long as the subcampanulate tube. Corolla 

 apparently ochroleucous. Vexillum narrowly oblong, somewhat 

 emarginate, a little exceeding the wings. Pods three-fourths of an 

 inch long, coriaceous, globose-ovate, with a strongly incurved acumi- 

 nate point, strigosely pubescent, completely 2-celled, few-seeded. 



2. Astragalus ch^etodon, Sp. Nov. 



A. procumbens ml assurgens, incano-liirsutus ; foliolis 8-17 -jugis elliptico- 

 lanceolatis obtusiusculis acutisve; peduncidis folio multo longioribus ; 

 spicis oblongis densifloris [fructiferis nunc compactis nunc modice elon- 

 gandis laxiusculis) ; calycibus villosissimis, dentibus subulato-setaceis 

 tubo longioribus; legumine calycem vix superante estipitato ovato acuto 

 compresso bilocellato lana decidua vestito, locellis \-2-spermis. 



t Hab. Upper Columbia and its tributaries, especially on the Koos- 

 kooskee. — Root thick and woody, perennial. Stems numerous, pros- 

 trate or assurgent, somewhat branching, about a foot long, clothed 

 as well as the leaves, with a dense grayish-white pubescence. Leaflets 

 about half an inch long, mostly elliptical-lanceolate and acute, but 

 sometimes broader and rather obtuse. Stipules subulate, distinct, and 

 free from the petiole. Spikes on slender peduncles. Corolla ochro- 

 leucous, about one-third of an inch long. Legume scarcely exceeding 

 the calyx-teeth, 3 or 4 lines long, tumid, finely veined transversely ; 

 clothed with a white tomentum, which is more or less deciduous, 

 The extreme forms of this species might be taken for distinct species. 



