174 ROSE ORDER 



(a) Pods 2-grooved above, the midrib and 



edges making 3 ridges, stalked in the 

 calyx, hanging 

 x. Flowers violet, 10-15 mm. long; pods 



about 15 mm. long A. bisulcdtus 



y. Flowers white, purple-tipped, 7-10 mm. 



long; pods about 10 mm. long A. haydenidnus 



(b) Pods deeply grooved below, the midrib 



much intruded 



x. Flowers white to yellowish; pods 2-3 

 cm. long, stalk usually longer than 

 the calyx 



(x) Stems and leaves long gray-hairy A. Drummondii 

 (y) Stems and leaves fine-hairy or 



smooth 



m. Calyx black-hairy; pod curved A.scopulorum 

 n. Calyx white-hairy; pod mostly 



straight A. racemosus 



y. Flowers purple; pods about 1 cm. long, 

 stalk equal to or shorter than the calyx 

 (x) Pod densely black-hairy; stalk 



equalling calyx A. alpinus 



(y) Pod not black-hairy; stalk shorter 



than calyx or none 

 m. Leaves ovate to rounded; pods 



mottled, little hairy A. sparsiftorus 



n. Leaves oblong to linear; pods not 



mottled, often shaggy A. humistrdtus 



(c) Pods not grooved above or below, the 



lower midrib intruded little if at all 



x. Pods distinctly to greatly inflated, 



papery; in one species less inflated 



and rather leathery, the upper midrib 



prominent 



(x) Stems very short or lacking 

 m. Pods 6-15 mm. long, sessile, the 

 upper midrib not acute and 

 prominent 



(m) Pods mottled, globose, smooth, 

 8-10 mm. wide; leaves linear 

 to oblong A. jejunus 



