LEGUMINOS^. (pulse FAMILY.) 133 



2. P. candidus, Michx. Smooth ; leaflets 7-9, lanceolate or linear-ob- 

 long ; heads ohlony, wlieu old cyliudrical ; hraots awiied, longer than the nearly 

 glabrous calyx ; corolla white, — With n. 1. 



3. P. villOSUS, Nutt. Soji-doivn// or silki/ all oxev; leajlets 13 -17, linear 

 or ohlonf/, small (4 -5" long); spikes ci/lindrlcal (1 - 5' long), short-peduucled, 

 soft-villous ; corolla rose-color. — Wise, to Mo., west to the Rocky Mts. 



4. P. folidsUS, Gray. /Swoof^, very leafy ; leaflets \b- 2^, linear-oblong ; 

 spikes ci/lindrtcal, short-peduucled; bracts slender-awued from a lanceolate 

 base, exceeding the glabrous calyx; petals rose-color. — Kiver-banks, 111. and 

 Teun. 



5. P. multiflorus, Nutt. G/a5?-o»s throughout, erect, branching ; leaf- 

 lets 3-9, linear to oblong; spikes globose, the subulate-setaceous bracts much 

 shorter than the acutely tootlied calyx ; petals white. — Kau. to Tex. 



17. TEPHROSIA, Pers. Hoary Pea. 



Calyx about equally 5-cleft. Standard roundish, usually silky outside, turned 

 back, scarcely longer than the coherent wings and keel. Stamens monadel- 

 phous or diadelphous. Pod linear, flat, several-seeded, 2-valved. — Hoary per- 

 ennial herbs, with odd-pinnate leaves, and white or purplish racemed flowers. 

 Leaflets mucronate, veiny. (Name from T€(pp6s, ash-colored or hoary.) 



1. T. Virginiana, Pers. (Goat's Rue. Catgut.) Silkij-villoua with 

 whitisli hairs wlien young ; stem erect and simple (1 -2° high), leafij to the top ; 

 leaflets 17-29, linear-oblong; flowers large and numerous, clustered in a ter- 

 minal oblong dense raceme or panicle, yellowish-white marked with purple. — 

 Dry sandy soil. June, July. — Roots long and slender, very tough. 



2. T. spicata, Torr. & Gray. Villous with rusti/ hairs ; stems branched 

 below, straggling or ascending {2° long), few-leaved ; leaflets 9-1.5, obovate 

 or oblong-wedge-shaped, often notched; flowers few, in a loose and inter- 

 rupted veri/ long-peduncled spike, reddish. — Dry soil, from Del. and Va. to 

 ria. and ]\[iss. July. 



3. T. hispidula, Pers. Hairy with some long and rusty or only minute 

 and appressed pubescence; stems slender (9-24' long), divergently branched, 

 straggling; leaflets 5-15, oblong, varying to obovate-wedge-shaped and ob- 

 lanceolate ; peduncles longer than the leai^es, 2-4-Jiowered , flowers reddish- 

 purple. — Dry sandy soil, Va. to Fla. and Ala. 



18. INDIGO FEE, A, L. Ixdigo. 



Calyx small, equally 5-cleft. Standard roundish, silky outside , wmgs co- 

 herent; keel erect, gibbous or spurred at base. Stamens diadelphous; con- 

 nective gland-like. Pod 1 - several-seeded, septate within between the seeds. 

 — Herbs or shrubs, mostly canescent with appressed hairs fixed by the middle, 

 with odd-piimate faintly-nerved leaves, and pink or purplish flowers in naked 

 axillary spikes. (So named because some of the species yield the indigo of 

 commerce.) 



1. I. leptosepala, Xutt. A perennial herl), ^-2*=' high; leaflets 5-9, 

 oblanceolate ; spikes very loose ; pods linear, 6 - 9-seeded, obtusely 4-angled, 

 reflexed. 1' long. — Kau. to Tex. and Fla. 



