296 NORTH AMERICAN FLORA [Volume 24 



Shorlianus but paler; pod slightly curved, 22-25 mm. long, 8 mm. wide, eanescent with short 

 kinked hairs, rounded at the base, acute at the apex. 



Type locality: Pinal Mountains, Arizona. 

 Distribution: Arizona, New Mexico, and southern Utah. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 47. 



12. Xylophacos iodopetalus (Greene) Rydb. Bull. Torrey Club 

 52: 152. 1925. 



Xylophacos stipularis Rydb. Fl. Rocky Mts. 504, 1063, mainly. 1917. Not Astragalus arietinus 



slipularis M. E. Jones. 1895. 

 Astragalus iodopetalus Greene, Bull. Torrey Club 52: 152, as a synonym. 1925. 



A perennial, with a cespitose caudex; stems 1-2 dm. high, sparingly pilose or glabrate; 

 leaves 1-2 dm. long; stipules large, scarious, deltoid, 6-8 mm. long; leaflets 21-27, obovate to 

 elliptic, 5-15 mm. long, 4-8 mm. wide, glabrate above, silky-pilose beneath; peduncles 5-10 

 cm. long; racemes short and dense; bracts lanceolate, 4—7 mm. long; calyx silky-pilose, the 

 tube S-10 mm. long, the teeth lance-subulate, 3 mm. long; corolla purple, fully 2 cm. long; 

 banner obovate, slightly retuse; wings shorter, the blades oblong, with a large basal auricle; 

 keel-petals still shorter, the blades broadly obliquely obovate, arched and rounded at the apex; 

 pod lanceolate in outline, arcuate, acuminate at the apex, obtuse at the base, cross-reticulate, 

 2.5-3 cm. long, glabrous. 



Type locality: Arboles, Colorado. 



Distribution: Southern Colorado and northern New Mexico. 



13. Xylophacos remulcus (M. E. Jones) Rydb. Bull. Torrey Club 



52: 153. 1925. 



Astragalus remulcus M. E. Jones, Proc. Calif. Acad. II. 5: 658. 1895. 



A perennial, with a cespitose caudex; stems decumbent at the base, 1-2 dm. high, silky- 

 canescent with rather short loose hairs; leaves 7-1 2 cm. long; stipules broadly deltoid, 4-5 mm. 

 long; leaflets 15-31, obovate, 8-15 mm. long, 4-8 mm. wide, rounded at the apex, glabrous or 

 nearly so above, pilose beneath; peduncles 5-10 cm. long; bracts lanceolate, 2 mm. long; 

 calyx rather loosely short-pilose, the tube 7-8 mm. long, the teeth deltoid, 1.5 mm. long; corolla 

 about 15 mm. long, light-purple, similar to that of the preceding; pod (not mature) ovoid, 

 slightly arcuate, less than 2 cm. long, glabrous, the upper suture prominent. 



Type locality: Bangharte's Ranch, Arizona. 



Distribution: Southern Arizona. 



Illustration: M. E. Jones, Rev. Astrag. pi. 48, f. 169. 



14. Xylophacos Chloridae (M. E. Jones) Rydb. Bull. Torrey Club 



52: 153. 1925. 



Astragalus remulcus Chloridae M. E. Jones, Rev. Astrag. 210. 1923. 



A perennial, with a woody root and short caudex; stems short, sparingly eanescent; 

 leaves ascending, 7-20 cm. long, the rachis sparingly strigose; stipules deltoid, scarious, 5-7 mm. 

 long, pubescent; leaflets 19-25, oval, 5-20 mm. long, rounded to acute at the apex, sparingly 

 strigose on both sides or glabrate above, green; peduncles 2-4 dm. high, stout, striate; bracts 

 lanceolate, 4 mm. long, longer than the pedicels; calyx more or less black-hairy, the tube 1 cm. 

 long, the teeth subulate, 4 mm. long; corolla purple, about 2 cm. long; banner obovate, moder- 

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

 obtuse; pod oblong, 3-4 cm. long, 7-8 mm. wide, arcuate, strigose, abruptly acute, slightly 

 sulcate on the lower suture. 



Type locality: Chloride, Arizona. 



Distribution: Arizona. 



Illustration: M. E. Jones, Rev. Astrag. pi. 48. 



