506 FABACEAE 



52. Lupinus sericeus Pursh.. Pursh's Silky Lupine. Fig. 2611. 



Lupinus sericeus Pursh, Fl. Araer. Sept. 2: 468. 1814. 



Appressed-silky and more or less villous with spreading hairs, simple or branched, erect, 

 3-6 dm. tall. Leaves cauline, the lower long-petioled, silky on both sides, petioles 3-10 cm. long, 

 leaflets 7-9, oblanceolate, acute at apex, 3-6 cm. long; peduncles 4-8 cm. long, racemes 12-15 

 cm. long, rarely densely flowered ; flowers 8-12 mm. long, verticillate or scattered below, pedicels 

 4-6 mm. long, spreading-pubescent, bracts deciduous ; upper calyx-lip bidentate, lower entire ; 

 petals purple, rose-colored, blue, creamy, or white, banner longer than broad, the back pubescent, 

 keel arcuate or nearly straight, ciliate on the upper edges ; pods 20-25 mm. long, yellow, seeds 

 flesh-colored, unmarked, about 6 mm. long. 



Dry hillsides and valleys, Upper Sonoran Zone; Utah and Wyoming to Montana and British Columbia. 

 Common in central Washington. Only California locality, Gaspipe Springs, Mono County. Type locality: "On 

 the banks of the Kooskoosky" (Clearwater River, Idaho). June-Aug. 



Lupinus sericeus var. flexuosus (Lindl.) C. P. Smith, Bull. Torrey Club 51: 307. 1924. (Lupinus flexu- 

 osus Lindl. ex Agardh, Syn. Gen. Lup. 34. 1835; Lupinus ornatus var. bracteatus Robinson ex Piper, Contr. 

 U.S. Nat. Herb. 11: 355. 1906; Lupinus subulatus Rydb. Bull. Torrey Club 34: 43. 1907.) Differing from 

 the species in lacking the spreading hairs below the inflorescence, the pedicels spreading-pubescent; floral bracts 

 often subpersistent, equaling or exceeding the buds. Upper Sonoran and Arid Transition Zones; plains and roll- 

 ing prairies, same range as the species. Type locality: "America Boreali-occidentali." 



53. Lupinus Abramsii C. P. Smith. Abrams' Lupine. Fig. 2612. 



Lupinus Abramsii C. P. Smith, Bull. Torrey Club 51: 308. 1924. 



White-woolly-villous, decumbent, branched, 5-6 dm. tall. Leaves many, white-woolly on both 

 sides, petioles short, 3-5 cm. long, leaflets 8-9, oblanceolate, acute or obtuse, 20-30 by 5-7 mm. ; 

 peduncles 6-10 cm. long, racemes 15-25 cm. long; flowers 14-16 mm. long, spreading, verticillate, 

 bracts deciduous, villous, 10 mm. long, pedicels 4-7 mm. long, woolly-villous ; calyx woolly, upper 

 lip bifid, lower tridentate ; petals broad, blue, banner suborbicular, pubescent on the back near 

 apex, 15-16 mm. wide, with a yellow center, keel slightly curved, ciliate along acumen and 

 middle ; ovules 8-9, pods and seeds unknown. 



Open pine woods, Transition Zone; Santa Lucia Mountains, California. Type locality: Los Pesares, Mon- 

 terey County, California. May. 



54. Lupinus Suksdorfii Robinson. Suksdorf's Lupine. Fig. 2613. 



Lupinus Suksdorfii Robinson ex Piper, Contr. U.S. Nat. Herb. 11: 355. 1906. 



Loosely appressed-pubescent and more or less villous, simple or somewhat branched, erect 

 or ascending, 4-6 dm. tall. Leaves cauline, the lower long-petioled, scattered, petioles 4-11 cm. 

 long, leaflets about 9, oblanceolate, acute, 30-60 by 6-12 mm. ; peduncles 4-8 cm. long, racemes 

 15-20 cm. long; flowers subverticillate or scattered, 11-14 mm. long, bracts early deciduous, and 

 much exceeding the buds, pedicels slender, 6-8 mm. long, spreading-pubescent; upper calyx-lip 

 notched, lower entire; petals blue, banner suborbicular, glabrous, the yellow center turning 

 brown, keel arcuate, ciliolate on upper margins ; pods 30-40 by 8-10 mm., appressed-silky, yellow, 

 ovules 5-7, seeds about 6 by 5 mm., flattish, flesh-colored, mottled with darker. 



Dry hillsides, Transition Zone; Klickitat County, Washington, and Hood River County, Oregon. Type 

 locality: Columbia River, west Klickitat County, Washington. May-July. 



55. Lupinus Sabinii Dougl. Sabin's Lupine. Fig. 2614. 



Lupinus Sabinii Dougl. ex Hook. Fl. Bor. Amer. 1 : 166. 1830. 



Appressed-subsilky, branched above, erect, 6-12 dm. tall. Leaves cauline, the lower long- 

 petioled, scattered, petioles stout, 5-25 cm. long, leaflets 8-11, oblanceolate, appressed-pubescent 

 on both sides, 6-15 cm. long, 8-25 mm. wide; peduncles 4-8 cm. long, racemes 15-30 cm. long; 

 flowers 15-18 mm. long, verticillate, bracts early deciduous, pedicels about 10 mm. long, spread- 

 ing-pubescent; calyx appressed-silky, upper lip notched, lower entire or notched; petals bright 

 yellow, or rarely pale purple, banner suborbicular, glabrous, keel arcuate, densely ciliate on the 

 upper edges ; pods about 40 by 12 mm., dull yellow, densely appressed-pubescent, ovules 5-7, 

 seeds 6-7 by 5 mm., flattish, dull reddish brown, unmarked. 



Dry hillsides, Arid Transition Zone; Blue Mountains of Washington and Oregon. Type locality: "Blue 

 Mountains of Northwest America, and on the dividing ridge of the Rocky Mountains near the confines of per- 

 petual snow." June-July. 



56. Lupinus excubitus M. E. Jones. Interior Bush Lupine. Fig. 2615. 



Lupinus excubitus M. E. Jones, Contr. West. Bot. No. 8: 26. 1898. 



Densely silky-appressed-pubescent, 3-15 dm. tall, with persistent woody stems, more or less 

 branched. Leaves all long-petioled, the lower internodes short, petioles 4-10 cm. long, leaflets 

 7-8, oblong-oblanceolate to spatulate, 2-4 cm. long, densely silky on both sides ; peduncles 4-18 

 cm. long, racemes 10-25 cm. long; flowers verticillate, the verticils well separated below, 10-13 

 mm. long, bracts deciduous, pedicels 4-6 mm. long, appressed-pubescent ; upper calyx-lip notched, 

 lower entire ; petals blue, more or less mixed with violet, banner with yellow center, often chang- 

 ing to rich violet, glabrous or more or less pubescent on the back, suborbicular, wings and keel 

 broad, the latter arcuate, ciliate on the upper edges and sometimes on the free edges below near 

 claws ; pods 3-5 cm. long by 7-10 mm. broad, ovules 6-8, seeds 4 by 3 mm., flattish, pale, with 

 yellowish brown lateral lines. 



Washes and rocky slopes, Upper Sonoran Zones; desert ranges of southern California, Inyo and Kern Coun- 

 ties to San Diego County, rarely near the coast. Type locality: Lone Pine, Inyo County, California. April- July. 



