320 NORTH AMERICAN FLORA [Volume 24 



14. Batidophaca petrophila (M. E. Jones) Rydberg, sp. nov. 



Astragalus desperatus petrophilus M. E. Jones, Rev. Astrag. 204. 1923. 



A perennial, with a taproot and a short cespitose caudex; stems 1-4 cm. long, crowded, 

 covered with broad conspicuous stipules and leaf -bases; leaves 1-4 cm. long, ascending; stipules 

 ovate, 2-3 mm. long, pubescent; leaflets 5-9, elliptic to oval, obtuse, 3-4 mm. long, ashy- 

 strigose; peduncles 1—3 cm. long; racemes short, 3-5-flowered ; bracts lanceolate, 2—3 mm. long; 

 calyx strigose, the tube 3 mm. long, the teeth lance-subulate, less than 1 mm. long; corolla 

 purple, about 8 mm. long; banner broadly obovate, rather strongly arched above the middle; 

 wings nearly as long, the blade oblong, strongly falcate, with a long reflexed auricle; keel-petals 

 about as long, the blade strongly lunate, obtuse; pod obliquely ovoid, scarcely 1 cm. long, 4-5 

 mm. wide and thick, white-villous, the upper suture slightly concave, the lower strongly con- 

 vex, somewhat sulcate at the base, the cross-section broadly subcordate. 



Type locality: San Rafael Swell, Utah. 

 Distribution: Type locality and vicinity. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 45. 



15. Batidophaca variegata Rydberg. 



Astragalus sparsijlorus majusculus A. Gray, Proc Am. Acad. 6: 206. 1864. 

 Tium variegalum Rydb. Bull. Torrey Club 34: 47. 1907. 



A cespitose perennial, with a taproot; stems many, erect or ascending, more or less mottled 

 with purple or brown, 3-4 dm. high; leaves ascending, 5-S cm. long; the rachis glabrous or 

 nearly so; stipules triangular or deltoid, distinct, 4-5 mm. long; leaflets 13-21, obovate to or- 

 bicular, rounded or retuse at the apex, sparingly strigose, soon glabrate, 5-10 mm. long; 

 peduncles 4—7 cm. long; racemes short, 1-2 cm. long, or in fruit 3-6 cm. long, 5-16 flowered; 

 calyx black-hairy, the tube 2-2.5 mm. long, the teeth subulate, 1-2 mm. long; corolla ochro- 

 leucous; banner 6-7 mm. long, obovate, purple- veined; wings 5 mm. long, the blade broadly 

 oblanceolate, longer than the claw, with a rounded auricle; keel-petals shorter, the blade 

 broadly lunate, rounded at the apex with a small auricle; pod about 2 cm. long, 4 mm. wide, 

 lance-oblong, tapering at each end, slightly arched, mottled with purplish-brown, minutely 

 strigose, sulcate on the lower suture except at the end, the cross-section cordate. 



Type locality: Platte Canon, Colorado. 



Distribution: Colorado. 



Illustration: M. E. Jones, Rev. Astrag. pi. 26 (as var. majusculus). 



16. Batidophaca sparsiflora (A. Gray) Rydberg. 



Astragalus sparsiflorus A. Gray (Proc. Acad. Phila. 1863: 60. 1863), Proc. Am. Acad. 6: 205. 1864. 

 Tragacantha sparsiflora Kuntze, Rev. Gen. 948. 1891. 

 Tium sparsiflorum Rydb. Bull. Torrey Club 32: 660. 1906. 



A cespitose perennial, with a taproot; stems many, decumbent, slender, 1-3 dm. long, 

 sparingly strigulose; leaves ascending, 2-8 cm. long, the rachis strigulose; stipules ovate, 

 strigose, 2-3 mm. long; leaflets 11-15, obovate, often retuse at the apex, 4—7 mm. long, glabrous 

 above, strigulose beneath; peduncles 3-5 cm. long, slender; racemes short, 2-5-flowered; 

 bracts lanceolate, 1 mm. long, shorter than the pedicels; calyx strigose, the tube 1.5 mm. long, 

 the teeth subulate, 1 mm. long; corolla white; banner obovate, purple-veined, deeply notched; 

 wings shorter, the blade broadly oblanceolate, arcuate; keel- petals still shorter, broadly lunate, 

 almost semi-circular; pod 8-10 mm. long, obliquely obovate, strongly curved, strigose, mottled, 

 the upper suture acute and up-curved, the lower deeply sulcate, thecross-section deeply cordate. 



Type locality: Rocky Mountains, Colorado. 



Distribution: Colorado. 



Illustration: M. E. Jones, Rev. Astrag. pi. 26, f. S3. 



17. Batidophaca sabinarum Rydberg, sp. nov. 



A cespitose perennial; stems short, decumbent, 4— S cm. long, branched, canescent with 

 ascending hairs; leaves ascending, 5-8 cm. long; stipules ovate, acuminate, about 5 mm. long; 

 leaflets 1 1-17, elliptic, 4-8 mm. long, acute at each end, grayish-pilose on both sides with ascend- 



