50.- Corydalis aurca, bldl., var. occidentalis, Eng. (Gr. Man. Fid. 62) Many branched from the root; spines about equally the corolla + pedicel; seeds smooth or minutely reticulated, marginless; pod erect or reflexed, straight or curved, shrunk or slender; bracts acute, ovate & conspicuous to linear minute; 6-14' high. Pods smooth, or puberulent upon the rachis only. a.) May 19, 1869. Wahsatch Mts., Utah. City creek cañon. 5,700 ft. 6 sp. b.) June 11, " Black Rock Station, S. side of Salt Lake. 4,200 ft. 2. c.) " 20, " Promontory Point, N. " " 1. d.) " 23, " Wahsatch Mts., Parley's Park. Creek bank. 6,000 ft. 1. e.) July 1, " " Silver creek cañon, rocks. " " 1. 51.- Corydalis aurca, bldl., var. micrantha, Eng. (Lc. l.c.) Flowers small, nearly spineless, on short pedicels. Aug. 12, 1869.- Uintah Mts., Utah. Bear River Cañon. 9,000 ft. 1 sp. Cruciferae. 52.- Parrya macrocarpa, R. Br., var. a. aspera, Hook. (Hook. Fl. Bor. Am. I. 47, p. 15. 746. Fl. I. 85.) The exact counterpart of the plant of the Archibald Northwest coast, hitherto its only known habitat. Near the summit of the highest peak of the Uintah Mts., at an altitude of 12,000 ft. In flower April. Aug. 3, 1869. Uintah Mts., Utah. Head of Bear river cañon 17 sp. 53.- Cheiranthus kingiiensis, Benth. & Hook. Valves opening elastically, though Nuttall states the contrary. a.) Apr. 23, 1865. Washoe Mts., Nev., near Mt. Davidson. In flower. 7,000 ft. 6 sp. b.) May 27, " Trinity Mts., summit west of Oreama. In flower. 6,000 ft. 1. c.) June 9, " Humboldt Mts., Nev. In flower April d.) " 25, " Gold Run district, near Mt. Cumberland. In fruit. 7,000 ft. 5.