Part 6, 1929] FABACEAE: GALEGEAE 361 



89. Phaca Prebblei Rydberg, sp. now 



Perennial, with a rootstoek; stems slender, 2-3 dm. long, prostrate or decumbent, sparingly 

 hairy; leaves 3-5 cm. long, spreading; stipules ovate, 3 mm. long; leaflets 13-17, elliptic or 

 oblong, 4-15 mm. long, acute at the base, obtuse or more often slightly emarginate at the apex, 

 glabrous above, sparingly strigose beneath; peduncles 7-12 cm. long; racemes 3-5 cm. long, 

 rather lax; bracts lanceolate, 2 mm. long; pedicels 1 mm. long; calyx black-hairy with short 

 hairs, the tube 3 mm. long, the teeth subulate, 1 mm. long; corolla purplish, about 10 mm. 

 long; banner broadly obovate, retuse, rather strongly arcuate; wings shorter, the blade obliquely 

 oblanceolate, falcate, with a reflexed auricle; keel-petals still shorter, the blade broadly lunate; 

 pod obliquely elliptic-ovoid, 1 cm. long, 3-4 mm. wide, white-strigose, the upper suture nearly 

 straight. 



Type collected on the Athabasca River. Alberta. August 14'. 1903, Prebble &■ Cary 123 (U. S. 

 Nat. Herb. 421630). 



Distribution: Alberta and Mackenzie. 



90. Phaca quinquiflora (S. Wats.) Rydberg. 



Astragalus quinqueflorus S. Wats. Proc. Am. Acad. 21: 450. 1886. 



Apparently annual; stems several, 1.5 dm. long or less, slender, prostrate or ascending; 

 strigose; leaves 3—8 cm. long; stipules deltoid or lance-deltoid, 2 mm. long; leaflets 7-11, linear 

 or linear-oblong, obtuse, 4-12 mm. long, strigose on both sides; peduncles 3-8 cm. long; racemes 

 2-5-flowered; calyx strigose, the tube 1.5 mm. long, the lobes subulate, 1 mm. long; corolla 

 white or purplish, 5 mm. long; pod ellipsoid, sessile, strigose, about 8 mm. long and 4 mm. wide; 

 seed nearly black, obliquely round-reniform, 1 mm. long. 



Type locality: Hills and Plains near city of Chihuahua. 

 Distribution : Chihuahua and Durango. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 7,f. 23. 



91. Phaca microcystis (A. Gray) Rydb. Mem. N. Y. Bot. Gard. 

 1:245. 1900. 



Astragalus microcystis A. Gray, Proc. Am. Acad. 6: 220. , 1864. 



Tragacantha microcystis Kuntze, Rev. Gen. 946. 1891. 



Astragalus miser M. R. Jones, Rev. Astrag. 98. 1923. Not A. miser Dougl. 1S34. 



Perennial, with a woody root and cespitose caudcx; stems decumbent or procumbent, 

 branched, 2-3 dm. long, strigose with curved hairs; leaves 4-6 cm. long; lower stipules connate, 

 the upper distinct, 3 mm. long; leaflets 9-13, oblong or lance-elliptic, obtuse or acute, 6-12 mm. 

 long, pilose with ascending curved hairs below, glabrous or nearly so above; peduncles 1-3 cm. 

 long; racemes about as long, 5-15-flowered; calyx appressed-hairy often with black hairs, the 

 tube 1.5 mm. long, the lobes subulate, 1 mm. long; corolla pink or white, 5 mm. long; banner 

 obovate, deeply notched, abruptly arched, purple-striate; wings much shorter, the blade ob- 

 liquely oval, rounded; wings still shorter, the blade broadly lunate, rounded at the apex; 

 pod rounded-obovoid, S— 10 mm. long, 5-6 mm. wide, sessile, usually white-pilose with spreading 

 hairs, seeds obliquely round-reniform, 2 mm. long. 



Type locality: Interior of Washington. Fort Colville. 

 Distribution: Montana to Washington and British Columbia. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 8,f. 32. 



92. Phaca scalaris (S. Wats.) Rydberg. 



Astragalus scalaris S. Wats. Proc. Am. Acad. 23: 270. 1888. 

 Astragalus scalaris quercelinus M. E. Jones, Rev. Astrag. 107. 1923. 



Biennial according to the original description, more likely perennial; stem sparingly and 

 finely strigose, slender, 3-6 dm. high, erect; leaves spreading, 5-7 cm. long; stipules deltoid- 

 subulate, 2 mm. long; leaflets 13-25, linear or oblong, 5-12 mm. long, 1.5-3 mm. wide, obtuse 

 or retuse at the apex, sparingly strigose beneath, glabrous above; peduncles 3-7 cm. long; 

 racemes lax, 5-10 cm. long, 1 0- 1 6-flowered ; calyx-tube 1.5 mm. long, sparingly black-strigose, 

 the lobes deltoid, 0.5 mm. long; corolla purplish, 5-6 mm. long; banner obovate, spreading; 



