PAP1L1ONACEAE (PEA FAMILY) 



19 a Cultivated vine; flowers 1-2 in. long, violet 



17. Bradburya. p 174 

 b Wild vine; flowers about % in. long, brownish-purple 



1 8. Apios. p 174 



20 a Plant more or less covered with silky hairs; flowers 



yellowish-purple 19. Cracca. p 174 



h Plant not covered with silky hairs; flowers whitish to 



purplish 20. Coronilla. p 174 



21 a Flowers about Vz-i in. long, yellow or blue; branched 



herbs turning black when dry; pods %-% in. long 



21. Baptisia. p 174 

 b Plants not completely as in a 22 



22 a Showy flowers about i in. long, yellow or purplish, 2-4 



on a long stalk; pods 4-7 in. long; vines 



22. Vigna. p 174 

 b Plants not completely as in a 23 



23 a Plants fragrant; leaflets oblong, Ms-i in. long, toothed; 



flowers white or yellow in slender racemes 



23. Melilotus. p 175 

 b Plants not fragrant 24 



24 a Flowers in heads, few-to-many-flowered, usually rather 



compact 25 



b Flowers usually in racemes or panicles 29 



25 a Twining vine; heads 3-io-flowered ; flowers purplish 



24. Strophostyles. p 175 

 b Not twining vines; heads usually more than lo-flowered 26 



26 a Leaflets finely toothed 27 



b Leaflets entire 28 



27 a Stipules toothed at base; pods spirally coiled 



25. Medicago. p 175 

 b Stipules not toothed at base; pods not spirally coiled 



26. Trifolium. p 175 



28 a Flowers yellow 27. Stylosanthes. p 175 



b Flowers purplish or whitish 28. Lespedeza. p 175 



29 a Flowers brownish-purple or violet; leaflets usually 5-7, 



sometimes 3 ; vines 30 



b Leaflets always 3 31 



30 a Cultivated vine; flowers 1-2 in. long, violet 



17. Bradburya. p 174 

 b Wild vine; flowers about V-2 in. long, brownish-purple 



1 8. Apios. p 174 



31 a Prostrate or climbing vines 32 



b More or less erect herbs 36 



32 a Standard usually spurred at base; plant cultivated for 



the foliage 29. Pueraria. p 176 



b Standard not spurred at base 33 



172 



