Part 



1929] 



FABACEAE: GALEGEAE 



417 



purple or white, rarely oehroleueous. Banner broadly obovate, subsessile; wings clawed, 

 the blade obliquely oblanceolate or lunate, with a reflexed auriele, free. Keel-petals adnate, 

 clawed, the blade broadly lunate, in two American species with a small beak. Stamens 

 diadelphous (9 and 1), the sheath straight, the free upper part of the filaments curved upwards. 

 Ovary many-ovuled, the style curved, the stigma minute, terminal. Pod elongate, sessile, 

 linear or oblong, or rarely lance-oblong in outline, usually somewhat compressed, rarely 

 terete, coriaceous or rarely membranous, not inflated, completely (or in one or two species 

 incompletely) 2-celled, the septum meeting the upper suture. Seeds obliquely reniform. 

 Type species, Astragalus hamosus L. 



Keel not beaked. 



Perennials, with a cespitose rootstock or caudex. 



Corolla 1-2 cm. long (rarely 7-10 mm. long); pod linear or narrowly 

 oblong, rather abruptly acute at each end, spreading. 

 Plant villous or pilose; calyx cylindric-campanulate, the tube 

 longer than the teeth. 

 Pod glabrous, strongly flattened 1. SuccumbEntes. 



Pod pubescent, less strongly flattened 2. Mal,ACAE. 



Plant strigose or glabrate; calyx campanulate. 



Low, pulvinate-cespitose, acauleseent, silvery plants; wings 



2-lobed. 

 Taller, leafy -stemmed, usually canescent or glabrous plants; 

 wings entire. 

 Corolla 5—7 mm. long; flowers in dense racemes; pod broadly oblong or 

 lance-oblong, gradually acute, reflexed. 

 Annuals, with few-flowered or headlike racemes. 



Pods linear, more or less spreading; corolla exceeding the calyx-lobes. 

 Pods lance-oblong, almost erect in dense head-like clusters; corolla not 

 exceeding the calyx-lobes. 

 Keel produced into a porrect beak. 



One species. 



1. Succumbentes 

 2. Malacae 



3. Scaposae. 



4. Tricarinatae. 



7. Hartwegianae. 



5. Leptocarpae. 



8. Wrightianae. 



6. acutirostres. 



1. H. succumbens. 



Calyx black-hairy; pod 2—1 cm. long; corolla purple or tipped with purple. 

 Pubescence spreading; pod moderately arcuate, acute or short-acu- 

 minate. 

 Pubescence appressed or ascending. 



Pod strongly arcuate, long-acuminate, 3-4 cm. long. 

 Pod straight or slightly arcuate, abruptly acute, 2-2.5 cm. long. 

 Calyx white-hairy; pod less than 2 cm. long; corolla white or oehroleueous; 

 pubescence villous. 

 Pod villous, thin-leathery, not reticulate, abruptly acute; plant more 



than 1 dm. high. 

 Pod strigose, thick-leathery, almost woody, long-tapering, strongly 

 reticulate; plant less than 1 dm. high. 



3. Scaposae 

 Leaflets solitary. 

 Leaflets 3-11. 



Calyx-teeth subulate-lanceolate, more than half as long as the tube. 

 Calyx-teeth deltoid-lanceolate, about one third as long as the tube. 

 Leaflets 3-9, oval or obovate, 5-12 mm. long; inflorescence several- 

 flowered. 

 Leaflets 7-11, oblong-oblanceolate, 3-4 mm. long; inflorescence 1-3- 

 flowered, rarely 4-flowered. 



4. Tricarinatae 

 Calyx more or less black -hairy. 

 Pod glabrous. 



Stem and leaves glabrous or nearly so. 

 Stem and leaves pubescent. 



Pubescence appressed; leaflets oblong. 



Stem slender; leaflets strigose on both sides; corolla about 8 



mm. long. 

 Stem stout; leaflets white-silvery above; corolla 15-16 cm. 

 long. 

 Pubescence spreading ; leaflets obovate, retuse. 

 Pod strigose; plant distinctly pubescent. 



Leaves and stem villous; pod acuminate, 15-16 mm. long. 



Corolla white or pale; pod reflexed-spreading; stems tall, erect. 

 Corolla dark-purple; pod erect; stem low, decumbent. 

 Leaves strigose beneath, glabrate above. 



Stem 1-2 dm. high; stipules large, broadly ovate, scarious; pod 

 firm. 



3. H. Layneae. 



4. H. Minthorniae. 



5. H. Andersonii. 



6. H . feensis. 



7. H. monophyllidia. 



8. H. calycosa. 



9. H. scaposa. 



10. H. manca. 



11. H. umbratica. 



12. H. bernardina. 



13. H. Iricarinala. 



14. H . Greggii. 



15. H. Congdoni. 



16. H. Gooddingii. 



17. H. ensiformis. 



