266 NORTH AMERICAN FLORA [Volume 24 



leaflets narrowly lance-oblong to oval, 3-20 mm. long, 1-6 mm. wide, strigose on both sides or 

 nearly glabrate above, acute to rounded at the apex; peduncles 4-10 cm. long; racemes at first 

 short, in age elongate, 2-8 cm. long; bracts subulate, 1-2 mm. long, black-hairy; calyx black- 

 hairy, the tube 2.5-3 mm. long, the teeth subulate, 1-2 mm. long; corolla dark-purple; banner 

 7-9 mm. long, slightly notched; wings 6-8 mm. long, the blade obliquely obovate, with a large 

 basal auricle, slightly longer than the claws; blade of the keel-petals broadly lunate, with a 

 rounded tip and a rounded basal auricle; pod short-stipitate, lance-oblong, flat, 10-15 mm. 

 long, 3-3.5 mm. broad, acute, black-hairy; seeds dark-brown, oblong-reniform, 3 mm. long, 

 2 mm. wide. 



Type locality: Rocky Mountains, on the British Boundary. 

 Distribution: Alberta, British Columbia, Idaho, and Montana. 

 Illustration: M. E. Jones, Rev. Astrag. pi. S,f. 29. 



23. Homalobus retusus Rydb. Bull. Torrey Club SO: 186. 1923. 



A perennial, with a slender cespitose rootstock; stems decumbent or ascending, 1-2 dm. 

 long; leaves 5—8 cm. long; stipules lanceolate or the lower ovate or triangular, connate, 1-2 mm. 

 long; leaflets 9-11, oblong to oval, often retuse or emarginate, 5-12 mm. long, 2-4 mm. wide, 

 glabrous above, sparingly strigose beneath; peduncles 6-10 cm. long, slender; racemes short, 

 5-10-flowered; bracts lanceolate, 2 mm. long; calyx black-hairy, the tube 2 mm. long, the teeth 

 subulate, 1 mm. long; corolla purplish; banner 8-9 mm. long, obovate; wings 7-8 mm. long, 

 the blade obliquely oblanceolate, with a long basal auricle; keel-petals slightly shorter, with a 

 rounded apex; pod black -hairy, sessile, S mm. long, 3.5 mm. wide. 



Type locality: Fort Selkirk, Yukon. 

 Distribution: Yukon and Mackenzie territories. 



24. Homalobus amblyodon (Kearney) Rydberg, sp. nov. 



Astragalus amblyodon Kearney, MS. 



A cespitose perennial; stems less than 1 dm. long, decumbent or prostrate; leaves 1-2.5 

 cm. long, spreading; stipules mostly connate, broadly deltoid, 2-3 mm. long; leaflets 5-13, oval 

 or obovate, retuse at the apex, 3-5 mm. long, glabrous above, sparingly strigose, especially 

 along the midrib and margins beneath; peduncles 1.5-3 cm. long; racemes few-flowered, very 

 short; bracts ovate, 1-2 mm. long, ciliate on the margins; calyx black-hairy, the tube 3 mm. 

 long, 2 mm. broad, the teeth deltoid, obtuse, 1 mm. long; corolla purple, 10-12 mm. long; 

 banner broadly obovate, notched at the apex; wings S-10 mm. long, the blade broadly obliquely 

 oblanceolate, somewhat falcate, with a reflexed auricle; keel-petals slightly shorter, similar but 

 broader; mature pod not seen; young pod 1-celled, black-hairy, neither suture reflexed, with a 

 flat beak. 



Type collected at Stepovak Bav, Alaska Peninsula, Alaska, Julv 8-19, 1899, Charles Palache 

 (U. S. Nat. Herb. 375154). 



Distribution: Known only from the type locality. 



4. Campestres. Cespitose caulescent perennials with a branched caudex or rootstock. 

 Stems erect to decumbent, elongate or short. Racemes several-flowered. Calyx campanulate, 

 mostly strigose, the teeth subulate to deltoid, acute. Corolla ochroleucous, white, or purplish, 

 small, the banner usually rather strongly arched, longer than the wings. Blades of wings and 

 keel-petals longer than the claws, lunate, the tip of the keel-petals deltoid or lanceolate, but 

 often blunt. Pod membranous, elongate-linear, sessile, strigose or glabrous. 



25. Homalobus campestris Nutt.; T. & G. Fl. N. Am. 

 1:351. 1838. 



Homalobus decumbens A. Gray, Proc. Acad. Phila. 1863: 60. 1863. Not H. decumbens Nutt. 1838. 



Astragalus campestris A. Gray, Proc. Am. Acad. 6: 229. 1864. Not A. campestris L. 1753. 



Tragacanlka campestris Kuntze, Rev. Gen. 943. 1891. 



Astragalus convallarius Greene, Erythea 1: 207. 1893. 



Astragalus serotinus campestris M. E. Jones, Proc. Calif. Acad. II. 5: 668. 1895. 



Astragalus decumbens convallarius M. E. Jones, Contr. W. Bot. 10: 58. 1902. 



