348 LEGUMlNOSiE. Phaca. 



above and below, and borne upon a slalk as long as themselves. . . . Flowers 

 middle-sized, white. Leaflets remote, 6-7 lines long, glabrous above. Le- 

 gume (not mature) about an inch long." Ilook. — Probably a species of Mr. 

 Nuttall's genus Homalobus. 



21. P. e'ongata (Hook.) : stem erect, (sometimes flexuous) angled, pubes- 

 cent, slightly branched; leaflets 8-10 pairs, oblong-cuneiform, retuse, canes- 

 cent beneath ; stipules very small, acuminate from a broad base, the lower 

 ones united ; peduncles much longer than the leaves; racemes elongated, 

 loose ; calyx silky ; legumes sessile, coriaceous, cylindraceous, curved, acute. 

 Hook. fl. Bor.-Am. 1. p. 140. 



Plains of the Saskatchawan, Richardson.^ Drumwond. — Stems nume- 

 rous, 12-18 inches high, strict. Leaflets about an inch long, glabrous above, 

 canescent beneath, the younger ones silky. Peduncles about a span long, 

 strict, twice or thrice the length of the leaves. Flowers small, white or 

 ochroleucous, purple on the keel, spreading, at length reflexed. Legume 

 coriaceo-cartilaginous, hirsute ; the sutures very slightly introflexed. Hook. 



n2. P. Jlexiiosa (Hook.): stem decumbent, flexuous, sparingly branched ; 

 leaflets 6-9 pairs, linear-oblong, obtuse, glabrous above, clothed with appres- 

 svd hairs beneath ; stipules very small, acuminate from a broad base, the low- 

 er ones united ; peduncles longer than the leaves ; racemes elongated, loose ; 

 calyx somewhat silky ; legumes sessile, coriaceous, cylindraceous, straight, 

 acute. Hook. I. c. 



Abundant on elevated and dry fertile soils of the Red and Assinaboin Ri- 

 vers, lat. 50^, Douglas. " Very similar to the preceding, with which it 

 should perhaps be united ; but the leaves are smaller and narrower, ' the 

 flowers purplish and very fragrant,' and the legumes not only smaller, but 

 straight." Hook. 



23. P. parviflora (Nutt. ! mss.) : "canescently pubescent, at length near- 

 ly glabrous; stem erect; leaflets 5-7 pairs, linear-oblong, obtuse, petiolulate ; 

 stipules oblong, obtuse, distinct ; the upper ones almost linear; peduncles 

 much longer than the leaves, the spike oblong; calyx hirsute with black hairs; 

 flowers dull-purple, the wings about the length of the keel; legumes on a 

 short stipe, at first hirsute. 



" Vallies of the Rocky Mountains. — Nearly allied to P. oroboides & P. 

 brachytropis; perhaps scarcely distinct from the latter: the flowers about 

 half the size of those of P. oroboides. Stem about a foot high." Nuttall. — 

 Calyx thickly hairy with white and black hairs intermixed. We have not 

 seen the fruit. 



24. P. paiiciflora (Nutt. mss.): "nearly glabrous; stem slender, even; 

 leaves on long petioles ; leaflets 8-10 pairs, lanceolate-linear, acute ; the ra- 

 chis grooved ; stipules partly united, acute ; peduncles few- (2-3-) flowered, 

 shorter than the leaves ; legumes very small, roundish-ovate, acuminate. 



" Plains of the Rocky Mountains, near streams. — Calyx pubescent with 

 blackish hairs ; the teeth acute, about the length of the short tube. I have 

 seen but a single specimen^ and that not in flower." Nuttall. 



25. P. parvifalia (Nutt. mss.): small, canescent, somewhat caespitosej 

 ■stem very short ; leaves on long petioles; leaflets 5-8 pairs (very small), lan- 

 ceolate-linear, mostly acute; the rachis flattened and slightly Avinged ; pe- 

 duncles slender, longer than the leaves; racemes short, few- (5-7-) flowered; 

 ■calyx short, pubescent with blackish hairs, the teeth acute, a little shorter than 

 the tube ; legumes pubescent, sessile, terete and somewhat boat-shaped, acute. 



" Rocky Mountains towards the sources of the Platte. — A small and slen- 

 der canescent species, with purple flowers. Lower stipules united ; the upper 

 ones smaller, triangular-ensiform." Nuttall. — We have seen no specimens 

 of this or the preceding species. 



