PEA FAMILY 371 



Eefs. — Astragalus umbraticus Sheld. Minn. Bot. Stud. 1:23 (1894). A. sylvaticus Wats. 

 Proc. Am. Acad. 23:262 (1888), type loc. Glendale, s. Ore., Henderson, Howell; Jepson, Man. 

 525 (1925) ; not A. sylvaticus Willd. (1803). Hamosa umbratica Kydb. Bull. Torr. Club 54:19 

 (1927). 



49. A. panamintensis Sheld. Panamint Loco. Stems short and shortly 

 branched, these and the slender curving leaves densely tnfted on the branched 

 root-crown, 2 to 4 inches high; herbage canescent, especially the stems; leaves 2^ 

 to 3% inches long, the petiole and rachis filiform; petioles 2 to 3 inches long; raehis 

 1/2 to 1 inch long; leaflets 5 to 11, narrowly linear or narrowly lanceolate, acute or 

 acuminate, 2 to 3^4 lines long; stipules distinct, triangular; racemes 2 or 3-flowered, 

 on slender peduncles shorter than or scarcely exceeding the leaves; flowers 5% 

 to 6 lines long; calyx-teeth subulate, about as long as the tube; corolla yellowish, 

 tipped with purple; pods linear, straight, strigulose, mottled, deeply grooved dor- 

 sally, incompletely 2-celled, 5 to 6 lines long, 1% lines wide, shortly stipitate. 



Desert canons, 4500 to 5500 feet : Panamint Range. Apr. 



Note on habit. — This plant with its short branches and croAvded leaves makes a very dense 

 tuft. The leaflets are small and few, often early deciduous, so that the petiole and rachis in age 

 are represented by a flagellate structure which is very slender and curving. It is mainly the 

 many congested stems and the foliage that endow this herb with an aspect which is different 

 from that of any other of our Astragali. We have seen no specimens save those of Coville & 

 Funston 606 from Surprise Canon and of Jones from Panamint Canon. It is, as thus far known, 

 one of the rarest of Astragalus species in western North America. 



Eefs. — Astragalus panamintensis Sheld.; Gov. Contrib. U. S. Nat. Herb. 4:87 (1893), 

 type loc. Surprise Canon, Panamint Eange, Coville 4' Funston 606. Tium panamintense Eydb. N. 

 Am. Fl. 24:396 (1929). A. atratus var. panamintensis Jepson, Man. 575 (1925). 



Astragalus orcuttianus Jones, Contrib. W. Bot. 10:63 (1902), type loc. "San Gregorio, 

 Colorado Desert, California". San Gregorio is in Lower California. 



50. A. calycosus Torr. Johnny Loco. Stems denselj'- tufted on a branched 

 root-crown, 1 to 3 inches high, the leaves and peduncles basal; herbage densely 

 silvery-silky; leaves 1 to 3 inches long; leaflets 3 to 5 (rarely to 11), obovate or 

 oblanceolate to oblong, 2 to 4 lines long; racemes 2 to 6 (or 8) -flowered, 3 to 9 lines 

 long, on peduncles shorter than or rarely exceeding the leaves; flowers 4 to 5 lines 

 long; calyx-teeth subulate, lA as long as the campanulate tube; corolla-wings whit- 

 ish, bilobed; banner purple; pods erect or ascending, oblong, straight or slightly 

 curved, finely but densely strigose, 5 to 7 lines long, 1% to 2 lines wide, deeply 

 grooved dorsally and thus incompletely 2-celled; seeds about 10. 



High montane, on dry slopes, 7000 to 11,000 feet : White Mts.; Inyo and Pana- 

 mint ranges. North and east through the desert ranges of Nevada, Utah and 

 Arizona. June (fl. andfr.). 



Locs. — Gray -haired Johnny's Corral, White Mts., Duran 1599; Inyo Eange (Contrib. U. S. 

 Nat. Herb. 4:86); Telescope Peak, Panamint Eange, Jepson 7007. Deep Creek, Nev., Jones; 

 Peach Sprs., Ariz., Lemmon; Jugtown, Utah, Jones 5403. 



Var. scaposus Jones. Plants 5 to 8 inches high ; peduncles 3 to 5 inches long, much exceed- 

 ing the leaves; leaflets 7 to 11; calyx-teeth deltoid-subulate, about % as long as the tube. — 

 Montane: Colorado Elver region from southwestern Colorado to northern Arizona. Owens 

 VaUey ace. Jones, Eev. N. Am. Astrag. 258, but doubtful. 



Eefs. — Astragalus calycosus Torr.; Wats. Bot. King 66, pi. 10, figs. 4r-7 (1871), West 

 Humboldt, East Humboldt and Clover Mts., Nev., Watson 257 ; Jepson, Man. 575 (1925) . Traga- 

 cantha calycosa Ktze. Eev. Gen. PI. 2:943 (1891). Hamosa calycosa Eydb. Bull. Torr. Club 40:50 

 (1913). Var. scaposus Jones, Zoe 4:26 (1893). A. scaposus Gray, Proc. Am. Acad. 13:366 

 (1878), type loc. Mokiah Pass, ne. Ariz., Palmer. A. candicans Greene, Bull. Cal. Acad. 1:156 

 (1885), type loc. n. Ariz., Bushy; not A. candicans Pall. (1800). Hamosa scaposa Eydb. Bull. 

 Torr. Club 32:659 (1905). 



51. A. obscurus Wats. Broom Loco. (Fig. 213.) Stems wiry or slender, 

 numerous in a broom-like tuft on a branched root-crown, 3 to 8 inches high ; herb- 

 age appressed-pubescent; leaves li/4 to 3 inches long; leaflets rather distant, 5 to 

 13, linear to oblong, 2 to 5 lines long; peduncles conspicuously longer, sometimes 



