496 FABACEAE 



by the leaves; flowers 6-8 mm. long, bracts deciduous or subpersistent, pedicels barely 1 mm. 

 long, subappressed-pubescent ; upper calyx-lip cleft, lower tridentate; petals pale blue, lilac, or 

 white, banner longer than wide, wings narrow, keel short-ciliate on the upper, nearly straight 

 edges ; ovules 3 or 4, pods and seeds not seen. 



Dry soils, Sonoran Zones; eastern Oregon to Montana and Colorado. Type locality: "in the grassy valleys 

 of the Rocky Mountains, on the Sweet Waters of the Platte and the Colorado of the West." June-July. 



26. Lupinus aridus Dougl. Arid-soil Lupine. Fig. 2585. 



Lupinus aridus Dougl. ex Lindl. Bot. Reg. 15: pi. 1242. 1829. 

 Lupinus brachypodus Piper, Bull. Torrey Club 29: 642. 1902. 



Appressed-silky and with few or many longer ascending hairs, simple or branched, not woody 

 at base, 1-2 dm. tall. Leaves long-petioled, crowded near the base, petioles 5-8 cm. long, leaflets 

 6-8, silky on both sides, 12—25 mm. long, oblanceolate ; peduncles ascending or erect, 2-10 cm. 

 long, usually exceeded by the foliage, racemes conoidal or cylindric, densely-flowered, 5-10 cm. 

 long, usually exceeding the foliage ; flowers 6-9 mm. long, bracts persistent, pedicels 1-2 mm. long, 

 silky; upper calyx-lip cleft, lower bi- or tridentate; petals violet-blue, banner oval or ovate, 

 glabrous, center changing from yellow to purple, keel nearly straight on the ciliated upper edges ; 

 pods silky, 10-12 mm. long, ovules 3 or 4, seeds whitish or pinkish, some 3 mm. long. 



Dry, barren soil and alluvial gravels, Sonoran Zones; Washington to northern California. Type locality: 

 "Same range of country as Lupinus leucophyllus. . . ." May-Aug. 



Lupinus aridus var. washoensis (Heller) C. P. Smith, Bull. Torrey Club 57: 303. 1924. (Lupinus pine- 

 torum Heller, Muhlenbergia 6: 25. 1910; not Jones, 1898; Lupinus washoensis Heller, Muhlenbergia 6: 72. 

 1910.) Stems numerous, procumbent, pubescence long and widely spreading. Transition Zone; Washoe County, 

 Nevada, and probably in adjacent California. Type locality: ridge south of Alum Creek, Washoe County, 

 Nevada. 



Lupinus aridus var. Torreyi (A. Gray) C. P. Smith, Bull. Torrey Club 51: 303. 1924. (Lupinus Torreyi 

 Gray ex S. Wats. Bot. King Expl. 58. 1871; Lupinus sellulus Kell. Proc. Calif. Acad. 5: 36. 1873.) Pe- 

 duncles elongated, usually exceeding the foliage. Upper Sonoran and Transition Zones; eastern Washington to 

 Tulare County, California, in the Sierra Nevada. Type locality: Donner Lake, Nevada County, California. 



Lupinus aridus var. abortivus (Greene) C. P. Smith, Bull. Torrey Club 51 : 303. 1924. (Lupinus abor- 

 tivus Greene, Muhlenbergia 8: 117. 1912.) Much branched, pubescence mostly appressed and short; racemes 

 slender and loosely flowered. Lower Sonoran Zone; arid southeastern Oregon. Type locality: Stinking Water, 

 Harney County, Oregon. 



Lupinus aridus var. Cusickii (S. Wats.) C. P. Smith, Bull. Torrey Club 51: 303. 1924. (Lupinus 

 Cusickii S. Wats. Proc. Amer. Acad. 22: 469. 1887.) Much branched, with pubescence short and appressed; 

 peduncles shorter and racemes all equaled or surpassed by the foliage, densely flowered. Lower Sonoran Zone, 

 dry foothills of the Blue Mountains, Oregon. Type locality: Upper Burnt River, Baker County, Oregon, hill- 

 sides above the forks. 



27. Lupinus lepidus Dougl. Prairie Lupine. Fig. 2586. 



Lupinus lepidus Dougl. ex Lindl. Bot. Reg. 14: pi. 1149. 1828. 



Subappressed-silky, with stems short and leaves basal or stems elongated and leafy, 15-40 

 cm. tall. Leaves long-petioled, petioles 10-15 cm. long, leaflets oblanceolate, silky on both sides; 

 peduncles 6-15 cm. long, racemes conoidal-cylindric, 8-16 cm. long; flowers exceeding the foli- 

 age; flowers 10—13 mm. long, eventually scattered or subverticillate, at least the lower suberect 

 after anthesis ; calyx and petals as in the last ; pods and seeds similar, somewhat larger. 



Dry prairies and slopes, Upper Sonoran and Transition Zones; Vancouver Island to northern California. 

 Type locality: "Fort Vancouver to the Great Falls of the Columbia." May-Aug. 



Lupinus lepidus var. Culbertsonii (Greene) C. P. Smith, Bull. Torrey Club 51: 304. 1924. (Lupinus 

 Culbertsonii Greene, Leaflets Bot. Obs. 1: 73. 1904.) Stems usually short, foliage greenish, not silky; lower 

 flowers suberect after anthesis. High Sierra, Tulare County, California; Canadian Zone. Type locality: "Forks 

 of the Kaweah River, at 8,000 feet." Tulare County, California. 



Lupinus lepidus var. confertus (Kell.) C. P. Smith, Bull. Torrey Club 51: 304. 1924. (Lupinus con- 

 fertus Kell. Proc. Calif. Acad. 2: 192. 1862.) Stems usually elongated and leafy; foliage usually silky, not 

 greenish; flowers many, crowded. Sierra valleys and meadows, Upper Transition Zone; Washoe County, Nevada, 

 and Plumas County, California, to San Bernardino Mountains and Mount Pinos, southern California. 



28. Lupinus pratensis Heller. Inyo Meadow Lupine. Fig. 2587. 



Lupinus pratensis Heller, Muhlenbergia 2: 210. 1906. 



Lupinus pratensis var. eriostachyus C. P. Smith in Jepson, Man. Fl. PI. Calif. 525. 1925. 



Appressed-pubescent below the inflorescence, stems erect, fistulous, light green, 6-9 dm. tall. 

 Leaves mostly short-petioled, finely appressed-hairy on both sides, petioles 3-10 cm. long, leaflets 

 5-9, linear to linear-oblong, 3-8 cm. long; peduncles 5-13 cm. long, racemes densely-flowered, 

 8-13 cm. long; flowers 10-12 mm. long, bracts persistent, lanceolate, pedicels 2-3 rnm. long, 

 densely spreading-pubescent ; upper calyx-lip bidentate, lower entire ; petals blue, violet, lilac, 

 or tawny, banner ovate or oval, glabrous, keel straight on the ciliated upper edges ; pods 18-20 

 mm. long, about 5 mm. wide, loosely pubescent, ovules 5, seeds not seen. 



Moist sandy soil, Upper Sonoran Zone; Sierra Nevada foothills of Inyo and Mono Counties, California. 

 Type locality: McGee Meadows, west of Bishop, Inyo County, California. May-Sept. 



29. Lupinus hypolasius Greene. Farewell Gap Dwarf Lupine. Fig. 2588. 



Lupinus hypolasius Greene, Leaflets Bot. Obs. 1 : 74. 1904. 



Subappressed-pubescent and more or less villous, stems longer than the peduncles, stoutish, 

 leafy, suberect, 5-15 cm. tall. Lower leaves long-petioled, petioles slender, 2-8 cm. long, leaflets 

 5-7, cuneate to oblanceolate, 6-12 mm. long, appressed-hairy above, villous below; peduncles 

 12-25 mm. long, racemes 5-10 cm. long ; flowers in 3-4 verticils, spreading, 7-8 mm. long, bracts 



