Part 5, 1929] FABACEAE: GALEGEAE 267 



Astragalus diversifolius roborum M. E. Jones, Contr. W. Bot. 10: 61, in part. 1902. 



Phaca convallaria Piper. Contr. U. S. Nat. Herb. 11: 373. 1906. 



Astragalus campeslris diversifolius F. Macbr. Contr. Gray Herb. 65: 35, in part. 1922. 



A perennial, with a creeping rootstock; stem 2-5 dm. high, strigose, angled; leaves 5-10 

 cm. long, pinnate, but the leaflets few, often irregularly inserted or lacking, especially the 

 terminal one, the rachis being prolonged, sometimes flattened at the end or arcuate-recurved; 

 stipules triangular, acute, 2-3 mm. long, the lower more or less connate; lateral leaflets linear 

 or filiform, 1-2 mm. long, involute, strigose, acute; racemes lax, together with the peduncle 

 8-16 cm. long; bracts subulate, 2-3 mm. long; pedicels 2-3 mm. long; calyx strigose with black 

 and white hairs mixed, the tube campanulate, 3-4 mm. long, the teeth subulate, about 1 mm. 

 long, black-hairy; corolla ochroleucous, rarely tinged with purple, the keel tipped sometimes 

 with purple; banner obovate, retuse, with a broad short claw; wings about as long, the blade 

 lunate-oblanceolate, with an acute basal auricle, the claw half as long as the blade; keel-petals 

 similar, with a lanceolate obtuse apex, the claw half as long as the blade ; pod linear-oblanceolate 

 in outline, tapering towards the base, with a cuneate apex, 2.5-3 cm. long, 3 mm. wide, strigose. 



Type locality: Sandy plains of the Colorado of the West near the sources of the Platte [Green 

 River Basin, Wyoming], 



Distribution: Wyoming to Utah and Colorado. 

 Illustration: M. E. Jones, Contr. W. Bot. 10: pi. 2. 



26. Homalobus junciformis (A. Nelson) Rydb. Bull. 

 Torrey Club 32:666. 1906. 



Astragalus junciformis A. Nelson, Bull Torrey Club 26: 9. 1899. 



A perennial, with a rootstock, usually branching below ground; stem cinereous-strigose, 

 2-4 dm. high, striate or angled; leaves 4-7 cm. long, with 5-9 leaflets, or the upper reduced to 

 the mere rachis; stipules triangular, 2-3 mm. long, scarious, the lower connate; lateral leaflets 

 linear or oblong, 5-15 mm. long, 1-3 mm. wide, strigose, the terminal one similar or often 

 wanting and represented by the prolonged rachis; racemes lax, together with the peduncle 

 8-15 cm. long; bracts lanceolate, 1-2 mm. long; calyx strigose, more or less black-hairy, the tube 

 4 mm. long, the teeth 0.6 mm. long, broadly deltoid; corolla ochroleucous, 10 mm. long, the 

 petals similar to those of H. campeslris; pod strigose, linear, 3 cm. long. 



Type locality: Point of Rocks, Sweetwater County, Wyoming. 

 Distribution: Southern Wyoming and northeastern Utah. 



27. Homalobus junceus Nutt.; T. & G. Fl. N. Am. 1: 351. 1838. 



Tragacantha juncea Kuntze. Rev. Gen. 945. 1891. 



Astragalus diversifolius Sheldon, Minn. Bot. Stud. 1: 120, in part. 1894. 

 Astragalus diversifolius junceus M. E. Jones, Contr. W. Bot. 8: 13. 1898. 

 Astragalus diversifolius roborum M. E. Jones, Contr. W. Bot. 10: 61. 1902. 

 Astragalus junceus altenuatus M. E. Jones, Rev. Astrag. 76. 1923. 



A perennial, with a creeping rootstock, usually branched underground ; stem 2-5 dm. high, 

 strigose, slender, angled; leaves 5-10 cm. long, pinnate or the upper often reduced to the 

 mere rachis; stipules triangular, 2-3 mm. long, scarious, the lower more or less connate; lateral 

 leaflets few, linear or linear-filiform, 1-2 cm. long, strigose, the terminal one usually wanting or 

 represented by the flattened upper part of the rachis, which is often arcuate or hooked ; racemes 

 lax, 5-15 cm. long; bracts subulate or lanceolate, 1.5-3 mm. long; calyx white-strigose, the tube 

 3.5-4 mm. long, the teeth about 1 mm. long, deltoid; corolla ochroleucous, rarely tinged with 

 purple, 8-10 mm. long, similar to that of //. campeslris; pod linear, nearly uniform in thickness, 

 acute at each end, 2.5-3.5 cm. long, 2 mm. broad, strigose; seeds oblong, 2.5 mm. long, 1.5 mm. 

 broad. 



Type locality: " In the Rocky Mountain Range towards the Oregon " [probably Idaho], 

 Distribution: Montana and Idaho to Nevada and Arizona. 



Illustrations: M. E. Jones, Contr. W. Bot. 10: pi. 1 (as .4. diversifolius): Rev. Astrag. pi. 3, 

 f. 11; pi. 4 (as var. altenuatus). 



