PEA FAMILY 489 



Lupinus densiflorus var. crinitus Eastw. Bull. Torrey Club 45: 195. 1918. Low, 8-15 cm. tall, very 

 villous with hairs 3-5 mm. long, short stems and peduncles mostly decumbent or deflexed; verticils 2-4. Bodega 

 Point, Sonoma County, California. Eastwood's Platycarpos. 



For other varieties see Bull. Torrey Club 45: 167-202. 



5. Lupinus luteolus Kell. Kellogg's Platycarpos. Fig. 2564. 



Lupinus luteolus Kell. Proc. Calif. Acad. 5 : 38. 1873. 



Lupinus Bridgesii A. Gray ex S. Wats. Proc. Amer. Acad. 8: 538. 1873. 



Appressed-subsilky, much like the last, but strictly fibrous and rigid, 3-9 dm. tall, widely- 

 branched above. Leaflets cuneate-oblong ; verticils few or many, crowded; petals pale yellow, 

 banner ovate, angled at apex, wings distinctly ciliate above and below near claws; seeds uni- 

 formly dark brown, regularly tuberculate. 



Alluvial gravels and hillsides, Upper Sonoran and Transition Zones; Jackson County, Oregon, to Contra 

 Costa and San Benito Counties, California. Type locality: near Senal, Mendocino County, California. June- Aug. 



6. Lupinus brevicaulis S. Wats. Short-stemmed Platycarpos. Fig. 2565. 



Lupinus brevicaulis S. Wats. Bot. King Expl. 53. 1871. 

 Lupinus uncialis S. Wats. Bot. King Expl. 54. 1871. 

 Lupinus scaposus Rydb. Bull. Torrey Club 34: 45. 1907. 

 Lupinus dispersus Heller, Muhlenbergia 5: 141. 1909. 



Densely villous, 3-10 cm. tall, stems scarcely 1 cm. long. Leaves basal, long-petioled, gla- 

 brous above, petioles 3-7 cm. long, leaflets 5-8, spatulate, 5-15 mm. long; peduncles 3-6 cm. long, 

 racemes subcapitate, about 2 cm. long in flower, elongating later, barely surpassing the foliage; 

 flowers 6-8 mm. long, crowded, pedicels 1-2 mm. long, villous ; calyx villous, upper lip 1-2 mm. 

 long, truncate to bifid with a broad sinus, lower lip 4-6 mm. long, entire to tridentate ; petals 

 bright blue or paler, banner narrow, the apex angled or rounded, keel straight, non-cilate ; pods 

 ovate, about 10 mm. long, ovules 2 or 3, seeds 2 mm. long. 



Desert sands, Lower Sonoran Zone; eastern Oregon to Colorado, New Mexico, Chihuahua, and southeastern 

 California. Type locality: "in the valleys and lower canyons of Western Nevada to the East Humboldt Moun- 

 tains, .... and on the islands of Salt Lake . . . ." May-June. 



7. Lupinus rubens Rydb. Red-stemmed Platycarpos. Fig. 2566. 



Lupinus rubens Rydb. Bull. Torrey Club 34: 45. 1907. 



Villous, branched at or near the base, 6-15 cm. tall; axial peduncle usually erect, commonly 

 flowering before the branches develop, racemes exceeding the foliage. Flowers 6-12 mm. long, 

 approximate or well scattered, pedicels 1-2 mm. long, glabrous or subvillous ; calyx-cup usually 

 glabrous, the lips setose, upper entire or notched, lower entire or toothed; petals as in the last, 

 the banner suborbicular and with a yellow center; pods ovate, 8-12 mm. long, more or less villous 

 on the sides, ovules usually 2, seeds not seen. 



Dry sandy soil, Lower Sonoran Zone; southern Utah to Nevada, Arizona, and adjacent California. Type 

 locality: southern Utah. May-June. 



Lupinus rubens var. flavoculatus (Heller) C. P. Smith, Bull. Torrey Club 46: 404. 1919. (Lupinus 

 flavoculatus Heller, Muhlenbergia 5: 149. 1909.) Branches early developing, widely spreading floriferous; 

 pedicels often 3-4 mm. long. Lower Sonoran Zone; western Nevada and adjacent California. 



8. Lupinus Shockleyi S. Wats. Shockley's Platycarpos. Fig. 2567. 



Lupinus Shockleyi S. Wats. Proc. Amer. Acad. 22: 470. 1887. 



Densely pubescent with short spreading hairs, subacaulescent, 1-2 dm. tall, axial peduncle 

 erect. Leaves long-petioled, subappressed-silky below, glabrous above except near the margins, 

 petioles 4-10 cm. long, leaflets 7-10, spatulate, 10-20 mm. long ; peduncles 3-10 cm. long, racemes 

 3-6 cm. long, equaled by the foliage ; flowers 5-6 mm. long, well scattered, bracts persistent, 

 pedicels slender, 2-3 mm. long, often curved, spreading-pubescent ; upper calyx-lip cleft, lower 

 tridentate or rarely cleft ; petals blue, purple, or pink, banner longer than wide, angled at apex, 

 keel straight on the upper edges, non-ciliate ; pods ovate to oblong, smooth or scaly on the sides, 

 ciliate on the edges, ovules 2, seeds about 3 mm. long, pale, wrinkled and rough. 



Desert sands, Lower Sonoran Zone; southern California, western Arizona, and Nevada. Type locality: near 

 Soda Springs, Esmeralda County, Nevada. April-June. 



9. Lupinus odoratus Heller. Mojave Platycarpos. Fig. 2568. 



Lupinus odoratus Heller, Muhlenbergia 2: 71. 1905. 



Glabrous or sparsely villous, subacaulescent, branches spreading, axial peduncle erect, 1-2 dm. 

 tall. Leaves basal, long-petioled, glabrous above, petioles 4-10 cm. long, leaflets 5-7, cuneate to 

 spatulate, 10-20 mm. long; peduncles 8-15 cm. long, racemes 5-10 cm.; flowers about 10 mm. 

 long, scattered, bracts short, persistent, pedicels 4-6 mm. long, glabrous ; calyx glabrous, upper 

 lip notched or entire, lower tridentate or entire ; petals blue or purple, banner with a yellow cen- 

 ter, suborbicular, keel somewhat curved; pods oblong, 17-20 mm. long, smooth or scaly on the 

 sides, villous on the margins, ovules 2-6, seeds about 3 mm. across, rough. 



Lower Sonoran Zone; Mojave Desert and adjacent Arizona and Nevada. Type locality: Kramer, San Ber- 

 nardino County, California. March-June. 



Lupinus odoratus var. pilosellus C. P. Smith, Bull. Torrey Club 46: 402. 1919. _ Stems and petioles 

 conspicuously pubescent with short, spreading hairs; ovules 2-4. Nipton and Mojave River, Mojave Desert, 

 California. 



