Fhaca. LEGUiMliNOS^E. 3 17 



Sand-hills on the banks'of the Missouri, lirndhury ! Nnttall ; and along 

 the Platte to the Rocky Mountains, Nnttall, J)r. Jinnex! May. — Roots fili- 

 form, creepinfT. Leaflets of the lower leaves an inch or more in lenirtli ; the 

 upper petioles often a span lona;, commonly destitute oClcallets, or somewhat 

 foliaceous at the apex, occasionally 3-5-foliolate. — Mr. Nultall compares the 

 leaves to those of Indi^^ofera (ilifolia. He stales the flowers (which do not 

 exist on our specimens)to be pale red. The mature pods are about an inch 

 and a hall in li'nf:^th, borne on a short stipe about the lensth of the calyx. On 

 page 300 of this work, this species has been inadvertently introduced under 

 the original name of Pursh. The mature fruit was first collected by Ur. 

 James. The plant is similar in habit to several species of Mr. Nuttall's ge- 

 nus Homalobus. 



• * Legumes coriaceous or cartilaginous. 



t Flowers white or purplish. 



18. P. pectinala (Hook.) : canescently puberulent or nearly glabrous ; stems 

 thick, branching, ascending, striate ; leaves subsessile, rigid; leaflets 6-10 

 pairs, very narrowly linear, rather acute, persistent (not articulated with the ra- 

 chis) ; stipules triangular-acuminate, partly united opposite the petioles; ra- 

 cemes aboi'.t 13-flowered, longer than the leaves, on thick peduncles; flowers 

 large (white), at length recurved ; legumes sessile, ovoid, pointed, turgid, 

 ihick and cartilaginous, transversely rugose, the upper suture much thicken- 

 ed .—//ooA:. ! ji. Bar.- Am. 1. j). 142, t. 54. 



ft. stem more flexuous ; leaves filiform. Hook. ! I. c. 



Pastures of the Saskatchawan, Drunimond ! Douglas ! Also in plains 

 along streams in the Rocky Mountains, near the sources of the Platte, Nut- 

 tall! — Stems about a foot hi:;h, naked below, very leafy above, fistulous. 

 Leaves pectinately divided rather than pinnate: leaflets perfectly continu- 

 ous with the rachis, "svhich is sometimes forked at the apex instead of bear- 

 ing a terminal leaflet. Flowers three-fourths of an inch in length. Calyx 

 cylindraceous ; the teeth very short. Vexillum obovate-oblong, much long- 

 er than the other petals. Legumes 12-14-seeded. 



19. P.Gollina (Hook.): erect or diffuse, hairy ; leaflets 9-11 pairs, nar- 

 rowly linear, obtuse, attenuate at the base into a short partial petiole ; sti- 

 pules very small, oblong, acuminate ; peduncles twice the length of the 

 leaves; racemes oblong, dense, with the flowers retracted; calyx tubular, 

 densely hirsute ; vexillum about the length of the wings ; legumes (imma- 

 ture) linear, pubescent, stipitate, deflexcd. Hook. fl. Bor.-Am. 1. p. 141. 



On the subalpine range of the Blue Mountains, in dry soils, Douglas. 

 .Tune-July. — " Stem a foot or more high. Leaflets remote, an inch long, ob- 

 tuse or retuse. Corolla white, apparently Avith a large purple spot on each 

 petal. — Remarkable for its narrow linear leaves, for the sudden deflexion of 

 the flower from the summit of the erect pedicel, for the elongated tube of 

 the calyx, and for the short vexillum." Hook. — We have not seen this spe- 

 cies, it perhaps belongs to Mr. Nuttall's genus Homalobus. 



20. P. podocarpa (Hook ) : canescent, much branched, diffuse ; stem and 

 branches striate; leaflets 6-9 pairs, broadly linear, obtuse; stipules ovate, 

 acuminate, very small ; peduncles longer than the leaves; racemes loose; 

 legumes oblong, coriaceous, compressed, hirsute with appressed hairs, acumi- 

 nate, attenuate at the base into a long stipe ; the sutures much thickened, 

 the upper one straight, the lower arcuate. Hook. I. c. p. 142. 



Dry barren and sandy grounds at the Great Falls of the Oregon ; rare 

 Douglas. June-Aug. — "This stands marked in Mr. Douglas's collection as 

 a new genus, and there is indeed something remarkable in the appearance 

 £)f its legumes, compressed as they are, and thickened at the sutures both 



