Part 6, 1929] 



FABACEAE: GALEGEAE 



315 



Pubescence strictly appressed; pod not silicate on the lower suture 

 or only slightly so near the base. 

 Leaflets lance-oblong; pod 12-15 mm. long, sulcate near the base. 

 Leaflets at least of the upper leaves narrowly lance-linear; pod 

 about 10 mm. long, not sulcate. 

 Plant erect; calyx-tube 5-6 mm. long, longer than the teeth; pod of a 

 thin texture. 

 Stems short, ascending, about 1 dm. high; calyx-lobes shorter than the 

 tube. 

 Pod 12-15 mm. long; calyx-lobes one fourth to one third as long as 



the tube. 

 Pod 7-8 mm. long; calyx-lobes two thirds as long as the tube. 



One species. 



. Sesquiflorae 



3. VlLLOSAE 



Pod hairy. 



Pod villous. 



Leaves and stem villous or hirsute; corolla yellowish or white, with 

 purple-tipped keel. 

 Corolla 15 mm. long or more; pod subcoriaceous. 

 Corolla 10 mm. long; pod membranous. 

 Leaves and stem strigose; corolla purplish. 

 Pod oblong-falcate; corolla 10 mm. long. 

 Pod ovoid; corolla 7-8 mm. long. 

 Pod strigose. 



Leaflets obovate; pod mottled. 



Plant stout, about 3 dm. high; racemes many-flowered; pod 2 em. 



long or more. 

 Plant slender, spreading; racemes 1-5-flowered; pod less than 1 cm. 

 long. 

 Leaflets oblong or linear; pod not mottled. 

 Pod glabrous. 



4. LOTIFLORAE 



Pubescence silky, appressed or ascending. 



Corolla 8-9 mm. long; pod 1.5-2 cm. long, equally abruptly acute at each 



end. 

 Corolla 10-11 mm. long; pod 2.5-3 cm. long, more tapering at the apex than 

 at the base. 

 Pubescens villous, spreading. 



5. B. humivagans. 



6. B. Sonorae. 



7. B. albida. 



8. B. accumbens. 



9. B. gilensis. 



10. B. sesqiiijlora. 



11. B. Parry i. 



12. B. villosa. 



13. B. des per ala. 



14. B. pelrophila. 



15. B. variegala. 



16. B. sparsiflora. 



17. B. sabinarutn. 



18. B. obtordata. 



19. B. lolijlora. 



20. B. cretacea. 



21. B. nebraskensis. 



1. Humistratae. Plants perennial, with a woody caudex; stems decumbent, the 

 stipules comparatively large, membranous, connate around the stem. Flowers in short dense 

 racemes. Calyx campanulate; corolla small. Pods leathery, strigose, obliquely lance-oblong 

 to broadly lunate, arcuate, acute on the upper suture, rounded or sulcate on the lower, at or 

 below the middle. 



1 . Batidophaca humistrata (A. Gray) Rydberg. 



Astragalus humislratus A. Gray, PI. Wright. 2: 43. 1853. 



Tragacantha humistrata Kuntze. Rev. Gen. 945. 1891. 



Tium huministralum Rydb. Bull. Torrey Club 32: 660. 1905. 



A perennial, with a cespitose caudex ; stems several, branched, decumbent, terete, sparingly 

 pilose with ascending or appressed hairs; leaves 4—5 cm. long, ascending, green; petioles 5-15 

 mm. long; stipules deltoid, 5-S mm. long, connate around the stem, united three fourths their 

 length, membranous, slightly pubescent; leaflets 13-19, oblong or rarely lance-oblong, obtuse, 

 acute, or mucronate, 8-18 mm. long, 2-4 mm. wide, glabrate above, sparingly pilose with 

 ascending hairs beneath; peduncles 3-8 cm. long; racemes 2-6 cm. long, rather dense; bracts 

 lanceolate, 5-8 mm. long; calyx sparingly pilose, the tube 3 mm. long, the teeth subulate, 4 mm. 

 long; corolla purplish to dirty-white, 10-12 mm. long; banner obovate, retuse, veined; wings 

 nearly as long, the blade obliquely oblong, with a rounded auricle; keel-petals slightly shorter, 

 the blade strongly arched at the middle, with a lance-triangular, but blunt tip; pod 15-20 mm. 

 long, strigose, arcuate, acuminate at the apex, blunt at the base, laterally compiessed at the 

 apex, the upper suture acute throughout, the lower one acute at the apex, sulcate at the middle, 

 and rather flat at the base. 



Type locality: Copper Mines [Santa Rita del Cobre], New Mexico. 

 Distribution: Southern Colorado to Chihuahua and Arizona. 

 Illustrations: M. E. Jones, Contr. W. Bot. pi. 1.; Rev. Astrag. pi. 6,f. 17. 

 21 



