WOOTON AND STANDLEY FLORA OF NEW MEXICO. 359 



Lower suture intruded as the result of dorsoventral flattening; pods cori- 

 aceous or woody. 

 Corolla yellow; flowers small. (Cnemidophacos.) 



22. A.flaviflarus. 

 Corolla at least partly purple; flowers large. (Xylophacos.) 



Pods densely long-hairy; only the keel of the corolla purple. 



23. A. newberryi. 

 Pods short-hairy or glabrous; corolla entirely purple. 



Flowers small, about 8 mm. long (sub capitate). 



24. A. accumbens. 

 Flowers large, 15 mm. long or more. 

 Pods short and nearly straight (dorsal suture not intro- 

 verted; mature pod sometimes laterally flattened). 



25. A. missouriensis. 

 Pods longer, strongly curved upward. 

 Pods obtuse at the base, the dorsal suture strongly in- 

 troverted 26. A. shortianus. 



Pods acute at both ends, the dorsal suture usually not 



much indexed 27. A. amphioxys. 



Neither suture of the pod introverted (except sometimes in A. subcinereus and 

 A. sonorae). 

 Pods strongly bisulcate ventrally, parallel to the suture. 



Flowers purple or violet, at least on the keel; pods 10 to 20 mm. long. 



28. A. bisulcatus. 



Flowers whitish; pods less than 10 mm. long 29. A. haydenianus. 



Pods not bisulcate. 



Leaflets spinose- tipped. (Kentrophyta.) 53. A. impensus. 



Leaflets not spinose-tipped. 



Pods membranous or chartaeeous, terete or flattened laterally, not 

 inflated. 

 Pods long-stipitate; stipe several times the length of the calyx. 

 Flowers purple; leaflets linear, about 1 cm. long. 



36. A. coltoni. 

 Flowers white; leaflets 2 cm. long or more. 



37. A. lonchocarpus. 

 Pods sessile or short-stipitate; stipe seldom exceeding the calyx. 

 Pods more or less flattened laterally. 



Pods sessile (linear-oblong, about 3 mm. long). 



30. A. diversifolivx. 

 Pods stipitate. 

 Stipe as long as or longer than the calyx ; llowers whitish. 



31. A. t( a, II us. 

 Stipe very short, hardy 1 mm. long; flowers purple. 



32. A. a iiujulunus. 

 Pods subterete. 



Pods sessile 30. A. diventfolvus. 



Pods stipitate, the slipe sometimes very short. 

 Stipe as long as the calyx; plants erect. 33. .!. proximua. 

 Stipe very short, almost obsolete; plant- erect oi decum- 

 bent. 

 Plants erect; pods 5 nun. in diameter at the upper end, 

 tapering to the small stipe, 2 cm. long or mure. 



34. A.fendUri. 



