Part 5, 1929] FABACEAE: GALEGEAE 281 



1. Diholcos decalvans (Gand.) Rydb. Bull. Torrey Club 



32:664. 1906. 



Astragalus bisulcalus decalvans Gand. Bull. Soc. Bot. Fr. 48: xv. 1902. 

 Astragalus Haydenianus leiocarpa Gand. Bull. Soc. Bot. Fr. 48: xv. 1902. 



A perennial, with a thick woody root; stems usually several from the short caudex, 

 3-10 dm. high, angled and sulcate, more or less strigose; leaves ascending, 7-15 cm. long, the 

 rachis sulcate and strigose; stipules lance-deltoid, acuminate, 5 mm. long; leaflets 21-27, 

 elliptic or oblong, 1.5-2.5 cm. long, 4—10 mm. wide, thick, glabrous above, sparingly strigose 

 beneath, obtuse at both ends or mucronate at the apex; peduncles 1-1.5 cm. long; racemes 

 7-15 cm. long, many-flowered; bracts subulate, 6-7 mm. long; flowers nodding; pedicels 2 mm. 

 long; calyx sparingly pilose, the tube gibbous at the base on the upper side, 6 mm. long, the 

 teeth subulate, 4—6 mm. long; .corolla white, nearly 2 cm. long; banner arched at the middle, 

 oblanceolate, retuse; wings shorter, the blade lunate, as long as the claw, with a spreading 

 basal auricle, acutish; keel-petals similar, a little shorter and rounded at the apex; pod glabrous, 

 stipitate, the stipe 4 mm. long, the body oblong, 12-20 mm. long, 2 mm. wide, 3 mm. thick, 

 seeds brown, obliquely reniform, 3.5-4 mm. long. 



Type locality: Fort Collins. Colorado. 



Distribution: Northern New Mexico to southern Wyoming. 



2. Diholcos bisulcatus (Hook.) Rydb. Bull. Torrey Club 



32:664. 1906. 



Phaca hisulcala Hook. Fl. Bor. Am. 1: 145. 1831. 



Astragalus bisulcatus A. Gray, Pacif. R. R. Rep. 12: 42. 1860. 



Tragacantha bisulcata Kuntze. Rev. Gen. 943. 1891. 



Astragalus bisulcatus hedysarifomis Gand. Bull. Soc. Bot. Fr. 48: xiv. 1902. 



A perennial, with a thick woody root; stems several from the short caudex, 3-10 dm. high 

 sulcate, more or less strigose; leaves ascending, 6-10 cm. long; stipules deltoid, acute or acu- 

 minate, 4-6 mm. long; leaflets 15-25, oblong to oval, 1-2.5 cm. long, 3-10 mm. wide, firm; 

 peduncles 7-15 cm. long; racemes many-flowered, 5-10 cm. long; bracts lance-subulate, 4-6 

 mm. long; flowers drooping; pedicels 2-3 mm. long; calyx strigose, the tube about 4 mm. long 

 and 3 mm. broad, the teeth subulate, 2-3 mm. long; corolla purple or rarely white, 12-15 mm. 

 long; banner obovate, moderately arched at the middle; wings nearly as long, the blade oblong, 

 with a long, recurved auricle; keel-petals a little shorter, the blade broadly obliquely lunate, 

 more curved towards the rounded apex, with a rather large auricle; pod strigose, the stipe 

 3-4 mm. long, the body 12-15 mm. long; seeds dark-brown or black, reniform, 4 mm. long, 

 2 mm. wide. 



Type locality: Plains of the Saskatchewan, Canada. 



Distribution: Manitoba to Nebraska. Colorado, Idaho, and Alberta. 



Illustrations: Pacif. R. R. Rep. 12: pi. 1 B; M. E. Jones, Rev. Astrag. pi. 63. f. 206; Britt. & 

 Brown. 111. Fl. /. 2135; ed. 2./. 2538; Clements. Rocky Mt. Fl. pi. 29. f. 14; Am. Jour. Bot. 15: pi. 

 45 H. 



3. Diholcos Jepsoni (Sheldon) Rydberg. 



Astragalus Havdenianus nevadensis M. E. Jones, Zoe 2: 241. 1891. 



Astragalus demissus Greene, Erythea 1: 221. 1893. Not A . demissus Boiss. & Heldr. 1849. 



Astragalus Jepsoni Sheldon, Minn. Bot. Stud. 1: 22. 1894. 



A perennial; stems several, 4—10 dm. high, sparingly strigose; leaves ascending, 7-12 cm. 

 long; stipules deltoid, 4 mm. long; leaflets 17-21, oval, ovate, or elliptic, thin, rounded or 

 retuse at the apex, 8-25 mm. long, 3-10 mm. wide; peduncles 1-1.5 cm. long; racemes rather 

 lax, 5-10 cm. long; bracts lanceolate, 2-3 mm. long; pedicles 2-4 mm. long; calyx strigose, the 

 tube 3 mm. long, 2.5 mm. broad, the teeth 2 mm. long; corolla white, with purple-tipped keel; 

 banner about 8 mm. long, obovate, strongly arcuate at the middle; wings about as long, the 

 blade oblong-oblanceolate, with a long reflexed auricle; keel-petals as long, similar but broader 

 and rounded at the apex ; pod strigose, the stipe 4 mm. long, the body elliptic, acute at each end, 

 8-10 mm. long, 4 mm. thick, 5-seeded. 



Type locality: Palisades. Nevada. 



Distribution: Type locality and vicinity. 



Illustration: M. E. Jones, Rev. Astrag. pi. 63, 2 05b [as A. llaydenianus\. 



