PEA FAMILY 543 



12. Hosackia rigida Benth. Rigid or Desert Hosackia. Fig. 2721. 



Hosackia rigida Benth. PI. Hartw. 305. 1848. 



Lotus rigidus Greene, Pittonia 2: 142. 1890. 



Lotus argensis Coville, Contr. U.S. Nat. Herb. 4: 83. 1893. 



Anisolotus rigidus Rydb. Bull. Torrey Club 33: 144. 1906. 



Anisolotus argensis Heller, Muhlenbergia 9: 67. 1913. 



Stems several from a perennial root, usually branched below, erect or ascending, 3-5 dm. 

 high, woody and broom-like, with long internodes. Leaflets 3-5, on a very short rachis, linear- 

 oblong to oblong-oblanceolate, 5-15 mm. long, strigose; peduncles stout, 6-12 cm. long; bract 

 when present 1-foliolate, subtending the 1-3-flowered umbel; calyx-tube 5-6 mm. long, appressed- 

 pubescent, the teeth subulate, nearly equaling the tube; corolla 15-25 mm. long, claws short, 

 included ; pods 3-4 cm. long, about 3 mm. wide ; seeds nearly globose, finely granulose. 



Rocky hillsides, Lower Sonoran Zone; desert regions extending from the Mojave and Colorado Deserts, Cali- 

 fornia, to southern Utah, Arizona, and Lower California. Type locality: collected by Coulter, locality not known. 

 March-May. 



13. Hosackia Wrightii subsp. multicaulis (Ottley) Abrams. Wright's Hosackia. 



Fig. 2722. 



Lotus Wrightii var. multicaulis Ottley, Univ. Calif. Pub. Bot. 10: 211. pi. 70. 1923. 



Stems many, arising from a woody perennial root, decumbent or ascending, 1-2 dm. long, 

 the internodes short, whole plant canescent with an appressed pubescence. Leaflets 3-5 on a very 

 short, almost obsolete rachis, linear-oblong, 6-10 mm. long; peduncles slender; calyx-tube 4 mm. 

 long ; teeth subulate, 2 mm. long ; corolla 8-10 mm. long, yellow, turning rose ; pods 20-25 mm. 

 long, 2-2.5 mm. wide; seeds nearly globose, smooth. 



Rocky hillsides, Sonoran Zones; desert regions, mainly in the juniper belt, New York Mountains, Mojave 

 Desert, California, to southern Nevada. Type locality: Barnwell, California. April-June. The typical species 

 ranges from southern Utah and Colorado to New Mexico and Arizona. 



14. Hosackia argyraea Greene. Silver Hosackia. Fig. 2723. 



Hosackia argyraea Greene, Bull. Calif. Acad. 1: 184. 1885. 

 Lotus argyraeus Greene, Pittonia 2: 144. 1890. 

 Anisolotus argyraeus Heller, Muhlenbergia 8: 47. 1912. 



Stems numerous from a stout woody root, prostrate, 1-3 dm. long, whole plant silvery with 

 dense silky pubescence, internodes short. Leaflets 3-5, on a very short rachis, cuneate-obovate, 

 4-10 mm. long; peduncles 15-35 mm. long; bracts none; umbels 1-2-flowered or rarely 3-4- 

 flowered; calyx-tube 2.5-3 mm. long, nearly equaled by the subulate teeth; corolla 7-10 mm. 

 long; pod 10-15 mm. long, 2-3 mm. wide, strigose; seeds globose, smooth. 



Dry slopes, Arid Transition Zone; San Bernardino Mountains, southern California, to northern Lower 

 California. Type locality: Cantillas Mountains, Lower California. May-Aug. 



15. Hosackia strigdsa Nutt. Strigose Hosackia. Fig. 2724. 



Hosackia strigosa Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 326. 1838. 



Hosackia nudiflora Nutt. loc. cit. 



Lotus strigosus Greene, Pittonia 2: 141. 1890. 



Annual, with numerous slender decumbent or ascending branches from the root crown, 1-2 

 dm. long, whole plant strigose. Stipules gland-like; leaf -rachis 5-15 mm. long; leaflets 3-9, 

 mostly 5-7, oblong-oblanceolate and acute to cuneate-obovate and rounded, retuse at apex, 5-10 

 mm. long ; peduncle longer than the leaves ; bracts in young plants none, in older, 1-3-foliolate, 

 subtending the 1-3-flowered umbel ; calyx-tube 2 mm. long, nearly equaled by the subulate teeth ; 

 corolla 8-10 mm. long, yellow turning rose-red; pods 2-3 cm. long, 2.5-3 mm. wide, strigose; 

 seeds quadrate, and more or less rugulose and tuberculate. 



Dry sandy or gravelly plains and hillsides, Upper Sonoran Zone; central California from the Bay Region 

 and Tuolumne County south to northern Lower California. Type locality: Monterey, California. Feb.-June. 



Hosackia strigosa var. hirtella (Greene) Hall, Univ. Calif. Pub. Bot. 4: 199. 1912. (Lotus hirtellus 

 Greene, Pittonia 2: 142. 1890. Lotus strigosus var. hirtellus Ottley, Univ. Calif. Pub. Bot. 10: 215. 1923.) 

 Distinguished from the typical species by the spreading hirsutulose pubescence; seeds granulose, and faintly or 

 not at all rugose. Dry gravelly or sandy soils, Upper Sonoran and (mainly) Arid Transition Zones; central 

 Sierra Nevada to the Cuyamaca Mountains, California. Type locality: ridge north of Hetch Hetchy, Sierra 

 Nevada, California. 



Hosackia rubella Nutt. in Torr. & Gray, Fl. N. Amer. 1: 326. 1838. (Lotus rubellus Greene, Pittonia 2: 

 141. 1890.) Perhaps only a small-flowered form (5-7 mm. long) of Hosackia strigosa Nutt. Coastal region, 

 San Francisco to San Diego, California. Type locality: Monterey, California. 



16. Hosackia tomentella (Greene) Abrams. Desert Hosackia. Fig. 2725. 



Lotus tomentellus Greene, Pittonia 2: 140. 1890. 



Annuals, the stems many from the root crown, prostrate, 5-15 cm. long, whole plant strigose; 

 stipules gland-like; rachis of leaves 5-15 mm. long; leaflets 5-7, cuneate-obovate, 3-10 mm. long; 

 peduncles about equaling the leaves, 1-2-flowered; calyx-tube 2-2.5 mm. long; teeth lanceolate, 

 scarcely 2 mm. long; corolla about 5 mm. long, turning rose; pod 1-2 cm. long, 2-2.5 mm. wide; 

 seeds globose to ovoid, finely granulose. 



Dry sandy or gravelly soils, Lower Sonoran Zone; desert regions from the Panamint Mountains, California, 

 to central Lower California and east to Arizona. Type locality: Los Angeles Bay, Lower California. Feb.-May. 



