(878.) P. ambiguum, Nutt.; Torr. & Gray, Fl. I, 626.

Ou dry hills at Lytton, Yale, Stump Lake, Kamloops and Sicamous, B.C., 1889. (Macoun.)

(3125.) P. eurycarpum, C. & E., Rev. of N. Amer. Umbell., 61.

P. macrocarpum, var. (?) eurycarpum, Gray; Macoun, Cat. III., 536.

On the hills, on the north side of Kicking Horse River, at Golden, Columbia Valley, 1885; quite common at Spence's Bridge, and on the arid hills along the Thompson River to Lytton, B.C. (Macoun.)

(877.) P. triternatum, Nutt.; Torr. & Gray, Fl. I., 626.

On rocks at Lytton, and along the Fraser River above it, 1889. (Macoun.)

(3026.) P. nudicaule, Nutt.; Torr. & Gray, Fl. I., 627.

Open prairie, Souris Co., Man., 1889. (T. Walker.)

(2154.) P. viilosum, Nutt.; Watson, King's Rep., V., 131.

Moose Mountain, Assiniboia, 1884. (J. M. Macoun.) Moist banks, Souris Co., Man., 1889. (T. Walker.)

(2155.) P. Sandbergii, C. & R, Bot. Gazette, XIII., 79.

P. - ---------? No. 2155, Macoun, Cat. III., 536.

"Caulescent, branching at base, an inch or two to a foot high, from an elongated slender root, rough puberulent; petioles wholly inflated, with a very conspicuous white scarious margin; leaves ternately or pin-nately dissected, the ultimate segments very short linear; umbel very unequally, 6 to 15-rayed, with involucels of distinct linear-lanceolate bractlets; rays, 1 to 4 inches long; pedicels, a line or two long; flowers, bright yellow; fruit, ovate, puberulent, 2 to 2 1/2 lines long, 1 1/2 lines broad, with very narrow Wings, and filiform dorsal and intermediate ribs; oil-tubes, 4 or 5 in the intervals, 6 on the commissural side; seed-face, plane." North and South Kootanie passes and summit of Crow Nest Pass, Rocky Mountains. (Dawson.)

(312V.) P. Martindalei, C. & R, var. augustatum, C. & R., Bot. Gazette, XIII., 143.

"Usually more caulescent than the species and sometimes taller, with more dissected leaves, and wings of fruit about half a line wide, making a fruit about 2 lines wide."

Summit of Mount Mark, altitude 3300 feet; and Mount Arrowsmith, altitude 5500 feet, Vancouver Island, 1887. (Macoun.)