590 FABACEAE 



oblanceolate in outline, 15 mm. long, 4-5 mm. wide, arched on the upper suture, nearly straight 

 on the lower, glabrous ; stipe 5 mm. long. 



Rocky slopes and ridges, Boreal Zones; Wallowa Mountains, Oregon. Type locality: Wallowa Mountains, 

 Oregon. June-Aug. 



72. Astragalus alpinus L. Alpine Rattle-weed or Milk Vetch. Fig. 2846. 



Astragalus alpinus L. Sp. PI. 760. 1753. 



Phaca astragalina DC. Astrag. 52. 1802. 



Astragalus andinus M. E. Jones, Rev. N. Amer. Astrag. 137. 1923. 



Atelophragma alpinum Rydb. Bull. Torrey Club 55: 130. 1928. 



Rootstock cespitose, creeping; stems slender, decumbent, 15-25 cm. high, densely or sparsely 

 strigose. Leaves 8—10 cm. long; leaflets 17-19, oval to elliptic; peduncles 7-14 cm. long, racemes 

 short and dense, 8-12-flowered ; calyx 4-5 mm. long, black-hairy ; corolla purplish with purple- 

 tipped keel, 10-11 mm. long; pods black-hairy, turgid, stipe 1-2 mm. long, body of pod 9-12 mm. 

 long, lower suture sulcate. 



Boreal Zones; Alaska and British Columbia south to Okanogan County, Washington, and east to New 

 England. Also Europe and Asia. Type locality: Lapland. June-July. 



AtelophrSgrna alpiniforme Rydb. Bull. Torrey Club 55: 129. 1928. Closely related to Astragalus alpinus 

 L. and probably only a form with glabrous leaves and smaller flowers. Known only from the type locality, 

 Wallowa Mountains, Oregon. 



73. Astragalus Macounii Rydb. Macoun's Rattle-weed. Fig. 2847. 



Astragalus Macounii Rydb. Mem. N.Y. Bot. Gard. 1 : 243. 1900. 

 Aielophragma Macounii Rydb. Bull. Torrey Club 32: 660. 1906. 



Perennial with a cespitose rootstock, the stems 3-6 dm. high, erect, strigose. Leaflets 9-17, 

 oblong to oval or elliptic, 15-25 mm. long, glabrous above, strigose beneath, thin; peduncles 7-15 

 cm. long ; racemes 2-5 cm. long, more elongated in age ; calyx black-hairy, 5 mm. long including 

 the short teeth; corolla blue-purple, about 10 mm. long; pod black-hairy, the body 16—18 mm. 

 long, 5 mm. wide and 3 mm. thick, acute at each end, neither suture sulcate. 



Edges of bogs or moist copses, Boreal Zones; British Columbia and Alberta to Okanogan County, Wash- 

 ington, Wallowa Mountains, Oregon, Idaho, East Humboldt Mountains, Nevada, and Colorado. Type locality: 

 Deer Park, Lower Arrow Lake, British Columbia. June-Aug. 



74. Astragalus weiserensis (M. E. Jones) Abrams. Weiser Rattle-weed. 



Fig. 2848. 



Astragalus Beckwithii var. weiserensis M. E. Jones, Zoe 5: 47. 1900. 

 Phacome weiserensis Rydb. N. Amer. Fl. 29: 383. 1929. 



Perennial with a woody root and cespitose caudex, the stems few, ascending, 2-3 dm. high, 

 glabrous. Leaves ascending, 10-15 cm. long; leaflets 7-17, rather distant, glabrous, oval to 

 broadly obovate, obtuse to rounded and retuse at apex, 10-20 mm. long; peduncles 4-7 cm. long; 

 racemes 4-5 cm. long; calyx glabrous or with scattering black hairs on the throat and base of 

 the teeth, the tube 5-7 mm. long, the teeth subulate, equaling the tube; corolla ochroleucous, 18 

 mm. long ; pod leathery, unmottled or faintly so, glabrous, the stipe 5 mm. long, nearly straight, 

 upper suture wing-margined, the lower only slightly sulcate. 



Dry flats, Upper Sonoran and Arid Transition Zones; Columbia Basin of eastern Washington, Oregon, and 

 Idaho. Type locality: Weiser, Idaho. April-May. 



75. Astragalus cimae Jones. Cima Rattle-weed. Fig. 2849. 



Astragalus cimae M. E. Jones, Rev. N. Amer. Astrag. 163. 1923. 

 Astragalus cimensis M. E. Jones, Rev. N. Amer. Astrag. Index. 1923. 

 Phacome cimae Rydb. N. Amer. Fl. 24: 384. 1923. 



Perennial, with a woody root and a cespitose caudex, the stems several, ascending, 1-3 dm. 

 high, glabrous. Leaves ascending, 5-12 cm. long, sparingly strigose on the margins of the leaf- 

 lets, otherwise glabrous; stipules mainly hyaline, deltoid-lanceloate, 6-8 mm. long; leaflets 15-21, 

 ovate to obovate, rounded or retuse at apex ; peduncles 3-8 cm. long ; racemes 2-8 cm. long, 

 5-12-flowered; calyx sparingly black-hairy, the tube 4 mm. long, the teeth subulate, 2 mm. long; 

 corolla purple, 10-11 mm. long; pod rather firm and leathery, glabrous, 2-2.5 cm. long, obcom- 

 pressed, obliquely oblong in outline in a side view, long-ovate seen from above, upper suture 

 acute, the lower sulcate, the partial septum about 1.5 mm. wide. 



Desert slopes, Lower Sonoran Zone; Mojave Desert in the vicinity of the New York and Ivanpah Mountains, 

 California. Type locality: near Cima, San Bernardino County, California. April-May. 



76. Astragalus Arthurii M. E. Jones. Waha Locoweed. Fig. 2850. 



Astragalus Arthurii M. E. Jones, Contr. West. Bot. No. 8: 20. 1898. 

 Tium Arthurii Rydb. N. Amer. Fl. 24: 388. 1929. 



Stems several from the woody crown, slender, erect or ascending, 3-4 dm. high, strigose- 

 pubescent. Leaflets 17-23, oblong, 6-12 mm. long, sparsely pubescent below, glabrous or nearly 

 so above ; peduncles erect, often 2 dm. long ; racemes at length 6-8 cm. long ; calyx with black 

 and white hairs intermingled, the tube 6 mm. long, the teeth barely 2 mm. long ; corolla white, 

 about 12 mm. long ; pods widely spreading or reflexed, narrowly linear, about 5 cm. long, includ- 

 ing the stipe, attenuate at each end, the body about 3 mm. wide, pubescent. 



Open slopes, Arid Transition Zone; eastern Washington and northern Idaho. Type locality: Lake Waha, 

 Nez Perce County, Idaho. May-July. 



