918 Charles V. Piper. 
This species differs from L. saxosus Howell in its greater stature, 
larger leaflets, and only obsoletely ciliate keel; from L. wyethii S. Wats., 
in the form of the leaflets, as well as in the sparse pubescence usually 
present on their upper surface. 
Other specimens referable here are the following: Horseshoe Basin, 
Lake & Hull; Mount Adams, Flett 1254; Henderson 15; Suksdorf 
' 2561, 108, 1787; Olympic Mountains, Piper, August, 1895; Mount Stuart, 
Brandegee 699; Elmer 1205; Goat Mountains, Allen 30. 
98. Lupinus laxiflorus forma theiochrous Robinson, apud Piper, I. c., 
p. 358. 
Corolla sulphur-yellow. 
Specimens examined: Near top of ridge, northern slope of Rattles- 
nake Mountains, Yakima County, Washington, J. S. Cotton, July 16, 1900. 
94. Psoralea lanceolata scabra (Nutt) Piper, l..c., p. 364. 
Psoralea scabra Nut.: Torr. & Gr., Fl, I, 300; 1838. — Psoralea purshii 
- Vail, Bull. Torr. Club, XXI, 94; 1889. — Eastern Washington and eastern 
Oregon. 
95. Hosackia americana (Nutt.) Piper, Le p. 366. 
Trigonella americana Nutt., Gen., II, 120; 1818. — Lotus sericeus Pursh, 
FL, Il, 489; 1814, not DC. 1813. — Hosackia purshiana Benth., Bot. Reg., 
XV, pl. 1257; 1829. — ? Hosackia unifoliata Hook., FJ. Bor. Am., I, 135; 
‘1830. — Hosackia elata glabra Nutt.; Torr. & Gr., FL, I, 327; 1888. — * 
Hosackia elata Nutt., loc. cit. — Hosackia floribunda Nutt, loc. cit. — 
Washington to Minnesota, south to California and Texas. 
96. Hosackia americana pilosa (Nutt.) Piper, l. c., p. 366. 
Hosackia pilosa Nutt.; Torr. € Gr., Fl., I, 327; 1838. — Hosackia mollis 
Nutt., loc. cit. — Washington, Oregon, and Idaho. 
97. Phaca lentiginosa (Dougl.) Piper, l. c., p. 368. 
Astragalus lentiginosus Dougl.; Hook., Fl. Bor. Am., I, 151; 1830. — 
? Astragalus diaphanus Dougl.; Hook., Fl. Bor. Am., I, 151; 1830. — Wa- 
shington to Nevada and California. 
98. Phaca suksdorfii (Howell) Piper, 1, c., p. 369. 
Astragalus suksdorfii Howell, Erythea, I, 111: 1893. 
Type locality: „In loose volcanic soil near the base of Mount Adams“, 
Washington. Collected by Suksdorf. : 
99. Phaca purshii (Dougl. Piper, l. c., p. 369. 
Astragalus purshii Dougl.; Hook., Fl. Bor. Am., I, 152; 1830. — British 
Columbia and Washington to California and Utah. 
100. Phaca purshii tincta (Jones) Piper, l. c., p. 369. 
Astragalus purshii tinctus Jones, Zoe, IV, 269; 1893. — Washington 
to California and Nevada. 
101. Phaca inflexa (Dougl) Piper, Le p. 369. 
Astragalus inflexus Dougl.; Hook., Fl. Bor. Am, I, 151; 1830. — 
Washington, Idaho, and Oregon. 
102. Phaca glareosa (Dougl.) Piper, |. c., p. 369. 
Astragalus glareosus Dougl; Hook., Fl. Bor. Am., I, ,52; 1830. — 
