An abundant species at the lower altitudes in open dry ground on the eastern slopes of the Rockies; flowering in early June. [Sidenote: =Aragallus monticola= (A. Gray) Greene. _Mountain Oxytrope._] Silvery-pubescent throughout, with appressed or slightly spreading hairs; tufted. Leaves basal, 3—6 inches long with 9—19 linear-oblong or lanceolate, acute or obtusish leaflets ¾—1 inch long. Flowers pale yellow or creamy-white ¾ of an inch or more long in dense heads, on peduncles longer than the leaves; calyx nearly half as long as the corolla, with long white and short black hairs. Frequent throughout the Rockies in dry stony and alpine meadows and slopes, at varying elevations; flowering from June to early July. [Sidenote: =Aragallus Lamberti= (Pursh) Greene. _Loco Weed._] Tufted, the branches of the caudex short; scapes few or several, erect, rather slender, 4—20 inches high. Leaves several, mostly erect, shorter than the scapes; leaflets 10—15 pairs, mostly oblong-lanceolate, from sparsely soft-pubescent to lightly canescent, acute, ½—1 inch long. Flowers pale yellow, ½ an inch long and twice as long as the calyx, in a loose head, 2—4 inches long. Abundant in the open ground on the eastern slopes of the Rockies; a strikingly handsome vetch frequently found in masses of considerable extent, especially in the region around Banff; flowering in June and early July. [Sidenote: =Aragallus splendens= (Dougl.) Greene. _Showy Oxytrope._] Densely silky, silvery-villous, acaulescent, and tufted. Leaves 4—9 inches long, erect; leaflets very numerous, in verticels of 3—6, oblong or oblong-lanceolate, acute or acutish at the apex, rounded at the base, ½ to nearly an inch long. Flowers deep purple, about ½ an inch long in dense spikes on peduncles exceeding the leaves. A very showy plant frequently flowering in considerable masses in the open grounds on the eastern slopes of the Rockies and dry alpine meadows; flowering in June. [Sidenote: =Aragallus viscidulus= Rydb. _Sticky Oxytrope._] Tufted, with parts of the old leaves remaining. Leaves all basal, 4—6 inches long with 8—15 pairs of leaflets, loosely villous-pubescent, oblong, obtuse or acutish, ¼ to nearly ½ an inch long, glandular on the margins. Flowers nearly ½ an inch long varying from pink to dark purple, in loose spikes on glandular sticky scapes, much longer than the leaves; calyx more than half as long as the corolla with white and shorter black hairs; calyx teeth and bracts of the inflorescence densely glandular. In dry open ground and alpine meadows through the Rockies at the lower altitudes, flowering in early June and forming dense tufted masses of brilliant pink, blue, or purple flowers; probably the most striking species in the vicinity of Banff. [Sidenote: =Aragallus deflexus= (Pall.) Heller. _Drooping-fruited Oxytrope._]