PEA FAMILY 499 



long ; flowers 10-12 mm. long, subverticillate, pedicels 5-7 mm. long, with the deciduous bracts 

 densely villous ; calyx scarcely gibbous, upper lip cleft, lower tridentate ; petals violet-purple, 

 banner glabrous, the whitish center turning brown, wings glabrous, keel arcuate, ciliate on upper 

 edges of acumen and middle ; pods and seeds not seen. 



Sagebrush areas, Upper Sonoran Zone; Harney County, Oregon, to western Nevada. Type locality: Truckee 

 Pass, Washoe County, Nevada. May-June. 



38. Lupinus corymbdsus Heller. Corymbose Lupine. Fig. 2597. 



Lupinus corymbosus Heller, Muhlenbergia 2: 69. 190S. 



Sparsely appressed-pubescent, erect, branched above, 3-6 dm. tall. Leaves many, short- 

 petioled, glabrate above, more or less silvery-silky below ; petioles 2-3 cm. long, leaflets 5-7, 

 linear-oblanceolate ; peduncles 2-3 cm. long, racemes 7-12 cm. long, lax or compact ; flowers 

 10-13 mm. long, scattered or subverticillate, pedicels 3-6 mm. long, appressed-pubescent; calyx 

 more or less gibbous, upper lip notched, lower entire ; petals blue or lilac, banner more or less 

 pubescent on the back, 9-12 mm. wide, wings glabrous, keel usually ciliate on the upper mar- 

 gins, sometimes non-ciliate, the acumen much upturned; pods appressed-silky, 20-25 mm. long 

 by 5 mm. wide, ovules 2-4, seeds about 4 mm. long, pale or dark flesh-colored, mostly unmarked. 



Sagebrush plains, Upper Sonoran Zone; eastern Oregon, northern Nevada, and northeastern California. 

 Type locality: Montague, Siskiyou County, California. June— Sept. 



39. Lupinus tenellus Dougl. Douglas' Slender Lupine. Fig. 2598. 



Lupinus tenellus Dougl. ex G. Don, Gen. Hist. PI. 2: .367. 1832. 



Sparsely appressed-silky, stems very slender, unbranched, erect or ascending, 3-6 dm. tall. 

 Leaves short-petioled, glabrate above, thinly pubescent below, petioles 3-4 cm. long, leaflets 5-7, 

 linear, falcate, 3-4 cm. long; peduncles 3-4 cm. long, racemes 10-15 cm. long, lax; flowers 8—10 

 mm. long, scattered, pedicels 3-5 mm. long, slender, appressed-pubescent ; calyx hardly gibbous, 

 the lips entire, slender ; petals violet-blue, banner somewhat hairy dorsally, suborbicular, wings 

 glabrous, keel much curved, ciliate on the upper edge of acumen and middle ; fruit not seen. 



Dry gravelly plain, Arid Transition Zone; Mill Plain (Fort Vancouver), Clark County, Washington. Type 

 locality: North America, on the western coast, as given by Don; Fort Vancouver, as given by Douglas' label with 

 type specimen. Evidently very local, perhaps now extinct. 



40. Lupinus oreganus Heller. Oregon Lupine. Fig. 2599. 



Lupinus oreganus Heller, Muhlenbergia 7: 89. 1911. 

 Lupinus amabilis Heller, op. cit. 8: 114. 1912. 



Thinly appressed-silky, scarcely branched, erect, 4-6 dm. tall. Lower leaves long-petioled, 

 scattered, glabrous above, petioles 5-15 cm. long, leaflets about 10, oblanceolate, acute at apex, 

 4-8 cm. long, 7-12 mm. wide; peduncles 5-10 cm. long, racemes 15-25 cm. long; flowers 10—12 

 mm. long, scattered or subverticillate, pedicels 7-12 mm. long, appressed-pubescent; calyx 

 scarcely gibbous, upper lip notched, largely concealed by reflexed sides of banner, lower lip en- 

 tire ; petals blue or purplish, banner glabrous or scantily pubescent on the back, wings glabrous, 

 keel falcate, non-ciliate ; pods and seeds not seen. 



Dry hills. Arid Transition Zone; Willamette Valley, south to Myrtle Creek, Douglas County, Oregon. Type 

 locality: Eugene, Lane County, Oregon. April-June. 



Lupinus oreganus var. Kincaidii C. P. Smith, Bull. Torrey Club 51: 30S. 1924. Upper calyx-lip short, 

 not concealed by the reflexed sides of the long-clawed banner. Known only from the type. Type locality: Cor- 

 vallis, Benton County, Oregon. 



Lupinus oreganus var. pusillulus C. P. Smith, Bull. Torrey Club 51: 305. 1924. Plants 1-2 dm ; tall; 

 flowers 8-9 mm. long, pedicels about 3 mm. long, spreading-pubescent; upper calyx-lip entirely exposed. Known 

 only from the type. Type locality: dry thicket, 13 miles southwest of Waldo, Josephine County, Oregon. 



41. Lupinus Biddlei Henderson. Biddle's Lupine. Fig. 2600. 



Lupinus Biddlei Henderson ex C. P. Smith, Sp. Lup. 108. 1939. 



Plant 3-5 dm. tall, stems fistulous, nerved, unbranched, glabrate. Leaves few as to both basal 

 and caudal, pale green, glabrous above, loosely subsilky below, lower petioles stoutish, 10-18 cm. 

 long, leaflets 7-9, flat when mature, obtuse and apiculate, widely oblanceolate or widest at the 

 middle, largest seen 40 mm. long, 15 mm. wide; peduncles fistulous, 2-10 cm. long, racemes 10-20 

 cm. long, verticils crowded, 10-20, bracts 3-5 mm. long, subpersistent, pedicels 5-12 mm. long, 

 spreading-pubescent, usually ascending; flowers 10-12 mm. long, spreading or ascending, rarely 

 drooping; calyx loosely silky, subsymmetrical at base, both lips entire, the lower spreading- 

 pubescent; petals blue or white, banner glabrous, often wider than long, very little reflexed, 

 wings wide, covering keel, keel arcuate, non-ciliate ; pods pale brown, loosely silky, spreading or 

 ascending, 30-40 mm. long, 8-10 mm. wide, ovules 4-6, seeds not seen. 



Dry sagebrush plains or slopes, Upper Sonoran Zone; Harney and Malheur Counties, Oregon. Type locality: 

 Alvord, Harney County, Oregon. May-June. 



42. Lupinus mucronulatus Howell. Howell's Waldo Lupine. Fig. 2601. 



Lupinus mucronulatus Howell, Erythea 1 : 109. 1893. 



Thinly appressed-pubescent, erect or decumbent, unbranched, 1-2 dm. tall. Leaves _ long- 

 petioled, glabrous above or glabrate on both sides, petioles 7-12 cm. long, leaflets 6—10, thickish, 

 obovate to oblanceolate, obtuse or broadly acute at apex, 3-5 cm. long, 8-10 mm. wide ; peduncles 

 7-12 cm. long, racemes 5-10 cm. long, rather dense; flowers 10-11 mm. long, subverticillate, 

 pedicels slender, 4-5 mm. long, appressed-pubescent, bracts deciduous ; calyx not gibbous, upper 

 lip notched, lower obscurely tridentate; petals purplish or yellowish, becoming brown, banner 



