Part 7, 1929] FABACEAE: GALEGEAE 437 



58. Hamosa Pringlei (S. Wats.) Rydb. Bull. Torrey Club 

 54: 336. 1927. 



Astragalus Pringlei S. Wats. Proc. Am. Acad. 21: 449. 1886. 



A tufted cespitose perennial, with a thick woody root; stems very numerous, short and 

 leafy, sparingly strigose, 5-15 cm. long, decumbent or ascending; leaves 1-3 cm. long, spreading; 

 stipules deltoid, 1-2 mm. long; leaflets 9-15, obovate, 2-4 mm. long, glabrous above, strigose- 

 canescent beneath; peduncles 1-2 cm. long; racemes dense, 1-2 cm. long; bracts lanceolate, 

 1 mm. long, shorter than the pedicels; calyx white-strigose, the tube 4-5 mm. long, 2.5 mm. 

 broad, the teeth 2 mm. long, subulate; corolla apparently white, 12 mm. long; banner obovate, 

 moderately arched; wings as long, the blade oblanceolate-oblong, with a reflexed auricle; keel- 

 petals much shorter, the blade broadly lunate; pod oblong, about 1 cm. long, 3.5 mm. thick, 

 nearly as wide, strigose, abruptly contracted at each end, the cross-section cordate, with a 

 broad sulcus. 



Type locality: Plains of Chihuahua. 

 Distribution: Chihuahua and Durango. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 69, f. 240. 



8. Wrightianae. Annual herbs, branched at the base; racemes dense, oblong, with rather 

 small subsessile flowers; calyx-tube turbinate, the teeth subulate and much longer, but exceed- 

 ing the corolla in length; corolla dark-purple; pod lance-oblong, strongly ascending, tapering 

 at the apex, cordate in cross-section. 



59. Hamosa Wrightii (A. Gray) Rydberg. 



Astragalus Wrightii A. Gray, Bost. Jour. Nat. Hist. 6: 176. 1850. 

 Tragacantha Wrightii Kuntze, Rev. Gen. 949. 1891. 



An annual; stem branched at the base, 1-2 dm. high, sulcate, villous, the branches erect or 

 ascending; leaves 2-4 cm. long, ascending; stipules deltoid or lanceolate, green, acuminate, 

 3-5 mm. long; leaflets 7-11, oblong or elliptic, acute, light-green, 1-2 cm. long, pilose on both 

 sides; peduncles 2-6 cm. long; racemes dense, headlike; bracts lance-subulate, 4-5 mm. long; 

 flowers subsessile; calyx silky- villous, the tube turbinate, 2 mm. long, the teeth subulate, 4 

 mm. long; corolla dark-bluish-purple, shorter than the calyx; petals subequal, 5 mm. long; 

 banner obovate, distinctly clawed; blade of the wings lunate, longer than the claw, with a 

 lanceolate, retrorse auricle; keel-petals similar, but the blade broader and shorter; pod lance- 

 oblong, about 1 cm. long, 3-4 mm. wide and about as thick, villous, tapering at the apex, the 

 cross-section cordate; seeds brown-spotted, obliquely round-reniform, 2 mm. long. 



Type locality: Near Austin, Texas. 



Distribution: Texas. 



Illustration: M. E. Jones, Rev. Astrag. pi. 68. 



55. HEDYPHYLLA Steven, Bull. Soc. Nat. Mosc. 

 29 2 : 142. 1856. 



Astragalus § Clycyphylla Steven, Bull. Soc. Nat. Mosc. 4: 266. 1832. Not Glyciphylla Raf. 1819. 



Perennial herbs. Leaves alternate, odd-pinnate. Flowers perfect, several or many in 

 axillary racemes. Calyx campanulate, rather short, oblique, with subulate teeth. Corolla 

 yellowish, or white. Banner free, obovate, retuse, moderately arched at the middle. Wings 

 free, clawed, the blade oblanceolate, with a large reflexed auricle. Keel-petals with united 

 blades, similar to the wings but the blades broader and shorter, broadly lunate. Stamens 

 diadelphous (9 and 1), the sheath nearly straight, the free portion of the filaments curved 

 upwards. Ovary elongate, the style curved upwards, glabrous, the stigma minute. Pod 

 elongate, subterete, slightly inflated, linear or lance-linear, more or less sulcate on the lower 

 suture, leathery or membranous, 2-celled by a double partition, formed by intrusion of the 

 lower suture, many-seeded, filled between the seed by a pulpy tissue becoming fibrous in age. 



Type species, Astragalus glycyphyllus L. 



