PEA FAMILY 175 



(n) Pods not mottled, hairy, ovoid, 

 6-15 mm. wide, leaflets lance- 

 oblong 

 r. Leaflets 7-11; corolla whitish; 

 stalks 1-3-flowered; pods 

 ovate, 12-15 mm. long A. humillimus 



s. Leaflets 9-13 ; corolla violet to 

 white; stalks 5-12-flowered ; 

 pods ovoid, 6-7 mm. long A. microcystis 

 n. Pods 2-3 cm. long, sessile, the up- 

 per midrib acute, prominent ; 

 stalk of flower cluster none or 

 short to exceeding the leaves, the 

 latter lanceolate to ovoid, gray- 

 hairy ; corolla yellow or yellow- 

 ish A. lohflorus 

 o. Pods 5-7 cm. long, stalk short, ob- 

 long-ovate ; flowers yellow to 

 white A. megacarpus 

 (y) Stems 5-20 in. high 

 m. Pods mottled with purple spots 

 (m) Leaflets linear or thread-like, 

 some lacking. 1-5 cm. long: 

 pods ovoid, stalk equal to 

 calyx; flowers pale rose A.pictus 

 (n) Leaflets oval to roundish, 

 about 1 cm. long; pods 

 ovoid, stalk longer than 

 calyx, jointed ; flowers whit- 

 ish A. artipes 

 n. Pods not mottled, though some- 

 times purplish 

 (m) Pods smooth or nearly so 

 r. Flowers white 



(r) Stalk of pod as long or 

 longer than the calyx ; 

 clusters many-flowered A. leptdleus 

 (s) Stalk of pod none ; clusters 



2-4-flowered A. americdnus 



s. Flowers purple; stalk of pod 



short or none A. Eastzvoodme 



