336 LEGUMINOS.E. AsxRAGALns. 



Along rivers, and on mountains ? Canada ! as far north as lat. 58^, to Louisi- 

 ana ! and west to the Oregon. June-Aug. — Stem 1-3 feet high, robust, 

 somewhat branched. Leaflets | to H inch long, u:^ually glabrous aoove, 

 sparsely pubescent beneath. Spikes 1-4 inches in length. Flowers about 8 

 lines long. Calyx more or less pubescent, often villous; the teeth subulate, 

 less than one-third the lens;th of the calyx. Legumes | of an inch long, ab- 

 ruptly pointed, forming a compact head or spike, lO-15-.seeded. Seeds reni- 

 form, compressed. — There can be little doubt that A. Canadensis and A.Ca- 

 roliniaaus are one species. The leaflets are variable from 21 to 29 ; but we 

 have never found so many as 41, the number assigned by Linnaeus to A. Caro- 

 linianus. In our specimens from the State of New-York, and from Gluebec, 

 the teeth of the calyx are scarcely one-fifth the length of the calyx ; but in all 

 others they are nearly one-third its length : in other respects there is no dif- 

 ference. 



32. A. spicatjfs (T^utt.l mss.) : "pubescent, erect; leaflets about 10 pairs, 

 elliptic-oblong, obtuse ; stipules ovate, acuminate ; peduncles rather longer 

 than the leaves; spikes oblong; bracts ovate, about the length of the pedi- 

 cels; flowers reflexed ; teeth of the calyx short, the upper ones widest ; le- 

 gumes cylindrical-oblong, terete, pubescent, with a short subulate point. 



"Plains, near streams, in the Rocky Mountain range. — Nearly related to 

 A. Canadensis ; but diflers in the legumes and bracts." Nuttall. 



33. A. tristis (Nutt. ! mss.): "somewhat pubescent, dwarf and decum- 

 bent ; leaflets 8-10 pairs, obovate-oblong, glabrous above; stipules ovate- 

 lanceolate; peduncles stout, shorter than the leaves; spikes oblong, dense, 

 the flowers reflexed ; bracts oblong-lanceolate, nearly as long as the blackish 

 villous calyx ; teeth of the calyx rather short, triangular ; ovary villous, 

 straight. 



'• ilocky Mountains, towards the sources of the Platte. — Allied to the two 

 preceding species, particularly to the latter; but a dwarfish plant." Nuttall. 



34. A. leucophyllus : canescent (the young leaves silvery), erect, tall ; 

 leaflets 14-18 pairs, oblong-linear, rather acute; stijules (small) subulate; 

 peduncles twice as long as the leaves ; spikes oblong, dense, the flowers erect- 

 spreading ; bracts subulate, a little longer than the pedicels ; teeth of the ca- 

 lyx subulate, about one-third the length of the til/!'. 



Calitornia, Douglas ! — Whole plant whitish, witaa very minute appressed 

 pubescence. Leaflets approximated, about | of an inch long, and 1-2 lines 

 wide. Stipules 2-3 lines long, broad at the base. Spikes about 2 inches in 

 length. Flowers as large as those of A. Canadensis. Vexillum oblong, a 

 little exceeding the wings. Ovary glabrous. Legumes not seen, 



35. A. Purshii (Dough): very hirsute ; stems short, diffuse; leaflets 6-8 

 pairs, oblong ; stipules lanceolate, acuminate ; peduncles half as long as the 

 leaves ; flowers in loose heads, spreading ; bracts linear-lanceolate, tv> ice as 

 long as the pedicels; calyx elongated, membranaceous; winces narrow, near- 

 ly as long as the vexiUiim ; ovary subsessile, linear, very hirsute. Hook. ft. 

 Bor.-Am. 1. p. 152. 



Low hills of the Spokan River, Oregon, Douglas. June. — Whole 

 plant very woolly-hirsute. Flowers yellow, li inch long. Teeth of the ca- 

 lyx subulate, equal, half as long as the tube. Vexillum obovate: keel purple 

 at the tip. Ripe legumes not known. Hook. 



36. A. glab er (Michx.) : stem nearly glabrous, erect; leaves {ew. distant; 

 leaflets 15-23, linear-oblong and linear-lanceolate, somewhat hairy beneath; 

 stipules almost none; spikes elongated, the flowers distant ; bracts subulate, 

 about as long as the pedicels ; calyx tubular-campanulate, the teeth broad and 

 very short; legumes oblong, acute at each end, compressed contrary to the 



