128 PtTLSE FAMILY. 



A. herbacea, Walt. In pine barrens, N. C. to Fla. and W., is pubes- 

 cent or glabrous, with 15-35 rigid, oblong, dotted leaflets, and spicate, 

 solitary, or panicled racemes oi blue or white flowers ; shrub 2-4, with 

 purple branches. 



* * Pods 2 seeded ; leaflets larger, scattered. 



A. frutic6sa, Linn. FALSE INDIGO. A tall or middle-sized shrub, 

 smoothish ; leaves petioled, of 15-25 oval or oblong leaflets ; flowers vio- 

 let or purple in early summer. River banks, Perm. S. and W. ; also 

 cult. 



18. PSORALBA. (Greek : scurfy, from the roughish dots or glands.) 

 Flowers early summer, violet, bluish, or almost white. ^ 



* Leaves pinnately 3-foliolate, or the uppermost of a single leaflet. 



P. Ondbrychis, Nutt. 3-5 high, erect, nearly smooth ; leaflets 

 lance-ovate, taper-pointed ; stipules and bracts awl-shaped ; flowers in 

 short peduncled racemes 3'-6' long; pods rough and wrinkled. River 

 banks, O. to 111., S. and E. 



P. melilotoldes, Michx. Dry places, W. and S. l-2 high, erect, 

 somewhat pubescent, slender ; leaflets lanceolate or lance-oblong ; stip- 

 ules awl-shaped ; flowers in oblong spikes, long-peduncled ; pods strongly 

 wrinkled. 



* * Leaves palmately 3-5-foliolate ; root not tuberous. 



P. tenuifl6ra, Pursh. Bushy-branched, slender, 2-4 high, somewhat 

 hoary when young ; leaflets linear or obovate-oblong, much dotted ; flowers . 

 (2"-3" long) in loose racemes ; pods glandular-roughened. Prairies, 111., W. 



P. argophylla, Pursh. Widely branched, l-3 high, silvery white all 

 over with silky hairs ; leaflets elliptic-lanceolate ; spikes interrupted. 

 Prairies, Wis., W. 



* * * Leaves palmately 5-foliolate ; root tuberous. 



P. escul^nta, Pursh. POMME BLANCHE. Low and stout, 5'-15' high, 

 roughish hairy ; root turnip-shaped, mealy, edible ; leaflets 5, lance-oblong 

 or obovate ; spike dense, oblong ; flowers ^ long; pod hairy, pointed. 



19. TEPHROSIA, HOARY PEA. (Greek: hoary. ) Native plants 

 of dry, sandy, or barren soil, chiefly S. ; flowers summer. 



* Stems erect, simple, very leafy up to the terminal, oblong, dense, raceme or 



panicle. 



T. Virginiana, Pers. GOAT'S RUE, CATGUT, from the very tough, 

 long and slender roots. White, silky-downy ; stem erect, simple, l-2 

 higli ; leaflets 17-29 linear-oblong ; flowers large and numerous, yellowish- 

 white with purple ; pods downy. Common N. and S. 



* * Stems branching, often spreading or decumbent; leaves scattered; 

 racemes opposite the leaves, long-peduncled; flowers fewer and smalltr ; 

 pubescence mostly yellowish or rusty. 



T. spicata, Torr. & Gray. l-2 high, loosely soft-hairy ; leaflets 

 9-15, wedge -oblong or obovate ; flowers 6-10, rather large, scattered, 

 white and purple, in a raceme or spike. Del. S. 



T. hispidula, Pers. Low, closely pubescent or smoothish ; leaflets 

 11-15, oblong, small, the lowest pair above the base of the petiole ; 

 flowers 2-4, small, reddish-purple. Va. S. 



T. chrysophylla, Pursh. Nearly prostrate ; leaflets 5-7, wedge-obo- 

 vate, smooth above and yellowish silky beneath, the lowest pair close to 

 the stem ; flowers as in the last. Ga. S. and W. 



