Smooth throughout; stems decumbent, rooting at the lower nodes, 6 inches to 2 feet long. Leaves oblong, ovate, or oblong-lanceolate, all distinctly petioled, sharply serrate with a wedge-shaped or rounded base, obtuse or acute at the apex, 1—3 inches long, ¼—1 inch broad. Flowers in racemes on slender peduncles in the axils of the leaves; corolla blue or nearly white, striped with purple, nearly ¼ of an inch broad, rotate, with 4 unequal lobes. In brooks and swampy places in the Selkirks, especially around Glacier; flowering throughout the summer. [Sidenote: =Veronica Wormskjoldii= R. and S. _Alpine Speedwell._] Hairy throughout with brown glandular hairs; stems ascending or erect, slender, usually simple, 2—12 inches high. Leaves oblong, ovate or elliptic, sessile, mostly rounded at both ends, crenulate or entire, ½—1 inch long. Flowers light blue, in a short, narrow raceme; corolla, ⅛ of an inch broad, rotate, lobes nearly equal and rounded. Throughout the region in open woods, and in alpine meadows and slopes up to 7000 feet elevation; flowering during June and July. [Sidenote: =Veronica serphyllifolia= L. _Thyme-leaved Speedwell._] Slightly hairy or smooth; stems slender, decumbent, the branches ascending or erect, 2—10 inches high. Leaves all opposite and petioled or the uppermost sessile, oblong, oval or ovate, ¼—½ an inch long, crenulate, entire. Flowers in short spicate racemes at the ends of the stems and branches; corolla pale blue or sometimes white, with darker stripes, nearly ¼ of an inch broad. In open grassy ground at the lower altitudes throughout the Selkirks, very abundant and striking in the lawn at Glacier House; flowering during June. [Sidenote: =Mimulus Lewisii= Pursh. _Red Monkey-flower._] Stems viscid-hairy, 2—4 feet high. Leaves from oblong-ovate to lanceolate, acuminate, denticulate, opposite, 2—4 inches long and ½ as broad. Flowers on peduncles longer than the leaves; calyx campanulate, ¾ of an inch long, with triangular acute teeth; corolla rose-red or paler, the tube twice as long as the calyx, throat open, limb two-lipped; lobes of the upper lip erect or turned backward, obcordate, the lower lip spreading, the lobes obovate. In wet ground and along streams through the Selkirks, frequently growing in such abundance as to practically exclude all other vegetation; the large showy, rose-purple flowers, each with two bright yellow patches in the throat. [Sidenote: =Mimulus cæspitosus= Greene. _Yellow Monkey-flower._] Smooth, stems flattened, decumbent and rooting at the nodes, the branches rising 3—6 inches high. Leaves orbicular or ovate, ½—1 inch long, dentate or denticulate, usually sublyrate, purple beneath. Flowers axillary on long peduncles; calyx campanulate, ⅓ of an inch long, mottled with dark purple; corolla bright yellow, ¾—1 inch long, throat spotted with dark red, lobes of the upper lip erect, ⅓—½ an inch long, the middle lobe of the lower lip broadly cordate, pendulous.