Aladdin's Slippers

Xylophacos vespertinus (Sheldon) Rydb. Bull. Torrey Club 32:662. 1906.
Astragalus vespertinus Sheldon, Minn. Bot. Stud. 1: 150. 1894.
Astragalus Chamaeluce panguicensis M. E. Jones, Proc. Calif. Acad. II. 5: 671. 1895.
Astragalus argophyllus panguicensis M. E. Jones, Contr. W. Bot. 8: 5. 1S98.
Astragalus panguicensis M. E. Jones, Contr. W. Bot. 10: 62. 1902.
Astragalus amphioxys vespertinus M. E. Jones. Rev. Astrag. 215. 1923.
A perennial, with a cespitose caudex ; stems 4-6 cm. long, decumbent or ascending, strigosecanescent; leaves 2-10 cm. long; stipules deltoid, acute, 5-6 mm. long; leaflets 1 1-15, obovateelliptic, 4-12 mm. long, white-strigose on both sides with hairs tapering at each end; peduncles 5— 10 cm. long; racemes 3— 6-flowered ; bracts lanceolate, 5 mm. long; calyx strigose with mixed black and white hairs, the tube S mm. long, the teeth subulate, 2 mm. long; corolla purple, tinged with magenta or green, 2.5 cm. long or more; banner obovate, deeply notched; wings nearly as long, the blades oblong; keel-petals with the blade broadly lunate; pod straight, oblong, abruptly acute, obcompressed, strigose, finely cross-reticulate, the upper suture prominent, 2.5-3.5 cm. long, 6 mm. wide, and 8 mm. thick.
Type locality: Grand Junction, Colorado.
Distribution: Southwestern Colorado, New Mexico and southern Utah.