PEA FAMILY 547 



branched, minutely strigose, but soon glabrous. Leaflets 3-5, glabrous or nearly so, narrowly 

 oblong-ovate, rounded at apex, 5-10 mm. long; umbels 2-5-flowered, on slender peduncles, 6-20 

 mm. long, bractless; calyx-tube 3 mm. long, very sparsely strigose, the teeth triangular or 

 triangular-subulate, scarcely 1 mm. long ; corolla yellow tinged with red, the standard equaling 

 the keel, the wings shorter ; pod sparsely strigose, the body about twice as long as the calyx, 1-2- 

 seeded, the beak slender, about equaling the body, strongly arcuate. 



Sandy or rocky hillsides, near the coast, Upper Sonoran Zone; Mendocino County to San Luis Obispo 

 County, California. Type locality: "California." April-July. 



26. Hosackia decumbens Benth. Decumbent Hosackia. Fig. 2735. 



Hosackia decumbens Benth. Bot. Reg. IS: under pi. 1257. 1829. 

 Syrmatium decumbens Greene, Bull. Calif. Acad. 2: 148. 1886. 

 Lotus Douglasii Greene, Pittonia 2: 149. 1890. 

 Lotus Leonis Eastw. Leaflets West. Bot. 2 : 7. 1937. 



Perennial, the branches arising from a woody crown, prostrate or decumbent, 2-5 dm. long, 

 very slender, appressed-pubescent when young, becoming nearly glabrous in age, internodes 

 elongated. Leaflets 3-5, oblanceolate to obovate, usually acute, 4-13 mm. long, villous-pubescent 

 on both surfaces ; umbels subsessile or short-peduncled, bracteate, with usually a 3-foliolate bract, 

 10-12-flowered, calyx appressed-pubescent and especially the teeth villous, 2.5 mm. long, equaled 

 by the subulate teeth ; corolla 6-7 mm. long, the standard oblong, exceeding the keel ; flowers 

 light yellow ; pod strongly arcuate, 10 mm. long, densely strigose, the body gradually tapering 

 into the beak, 2-seeded. 



Sandy or gravelly soils, Arid Transition Zone; Olympic Peninsula, Washington, and western Idaho, south 

 to Siskiyou and Trinity Mountains, California. Type locality: northwest coast of America. May-Aug. 



27. Hosackia nevadensis (S. Wats.) Parish. Sierra Nevada Hosackia. 



Fig. 2736. 



Hosackia decumbens var. nevadensis S. Wats. Bot. Calif. 1: 138. 1876. 

 Syrmatium nevadense Greene, Bull. Calif. Acad. 2: 148. 1886. 

 Lotus nevadensis Greene, Pittonia 2: 148. 1890. 

 Hosackia nevadensis Parish, Plant World 20: 220. 1917. 



Perennial from a slightly woody taproot, the branches slender, prostrate, 2-5 dm. long, mi- 

 nutely appressed-pubescent when young, becoming nearly glabrous in age, internodes elongated. 

 Leaflets 3-5, obovate, mostly obtuse or rounded at the apex, 5-10 mm. long, villous-tomentose on 

 both surfaces, the lower umbels on peduncles 10-25 cm. long, the upper often subsessile, bract 

 1-3-foliolate ; calyx 3 mm. long, tomentose, the teeth subulate, half the length of the tube ; corolla 

 6 mm. long, yellow, often tinged with red, the standard scarcely exceeding the keel ; pod strongly 

 arcuate, 6 mm. long, the body shorter than the slender strongly curved beak, sparsely pubescent, 

 1 -seeded. 



Open pine forests, Arid Transition and Canadian Zones; northern Sierra Nevada south to the Laguna Moun- 

 tains, San Diego, California. Type locality: "Carson City, Nevada," probably in the mountains to the west of 

 Carson City. May-Aug. 



28. Hosackia sulphurea (Greene) Abrams. Sulphur-flowered Hosackia. 



Fig. 2737. 



Lotus sulphureus Greene, Pittonia 2: 293. 1892. Not Boiss. 

 Lotus Davidsonii Greene, Erythea 1 : 207. 1893. 

 Syrmatium Davidsonii Heller, Muhlenbergia 9: 67. 1913. 



Perennial, the branches numerous, arising from a short-branched woody crown, slender, 

 prostrate, 2-5 dm. long, appressed-pubescent when young, becoming nearly glabrous in age, in- 

 ternodes 2-4 cm. long. Leaflets 3-5, canescent, with a tomentose-villous pubescence, 4-12 mm. 

 long, narrowly to broadly obovate, obtuse or acutish at apex; the peduncles 3-12 mm. long; 

 umbels 4-8-flowered, 1-bracted ; calyx villous-tomentose, 3 mm. long, the teeth subulate, nearly 

 as long as the tube ; corolla sulphur yellow, fading red, the standard broadly obovate, erect, mak- 

 ing a right angle to the wings ; body of the pod short, about equaling the calyx, strongly arcuate, 

 1-seeded, exceeded by the slender curved beak. 



Rocky ridsjes and open coniferous forests, Upper Sonoran and Arid Transition Zones; Mount Pinos, Ven- 

 tura County, south to the San Bernardino Mountains, California. Type locality: Mount Wilson, Los Angeles 

 County, California. April-July. 



29. Hosackia argophylla A. Gray. Silver-leaved Hosackia. Fig. 2738. 



Hosackia argophylla A. Gray, PI. Thurb. 316. 1854. 

 Hosackia argentea Kell. Proc. Calif. Acad. 3: 38. 1863. 

 Syrmatium argophyllum Greene, Bull. Calif. Acad. 2: 147. 1886. 

 Lotus argophyllus Greene, Pittonia 2: 149. 1890. 



Perennial, woody at base, the branches numerous, slender, prostrate or decumbent, 2-5 dm. 

 long, whole plant silvery with a dense, silky pubescence, internodes 15-30 mm. long. Leaflets 

 3-5 broadly oblanceolate to broadly obovate, 4-12 mm. long, rounded or obtuse at the apex ; 

 umbels sessile or subsessile, 1-bracted, 3-8-flowered ; calyx 4 mm. long, the teeth subulate, half 



