LEGUMINOS.E. (PULSE FAMILY.) 133 



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

 lony ; heads oblong, when old cylindrical ; bracts awned, longer than the nearly 

 glabrous calyx; corolla white. With n. 1. 



3. P. villoSUS, Nutt. Soft-downy or silky all over ; leaflets 13- 17, linear 

 or olilow/, small (4 -5" long); spikes cylindrical (1-5' long), short-peduncled, 

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



4. P. folibsus, Gray. Smooth, very leafy ; leaflets 15-29, linear-oblong; 

 spikes cylindrical, short-peduncled; bracts slender-awned from a lanceolate 

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

 Teiin. 



5. P. multiflorus, Nutt. Glabrous throughout, erect, branching; leaf- 

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

 shorter than the acutely toothed calyx , petals white. Kan. to Tex. 



17. T E P H R 6 S I A, 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 retypos, ash-colored or hoary.) 



1. T. Virginiana, Pers. (GOAT'S RUE. CATGUT.) Silky-villous with 

 whitish hairs when young ; stem erect and simple (1-2 high), leafy 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 rusty hairs ; stems branched 

 below, straggling or ascending (2 long), few-leaved; leaflets 9-15, obovate 

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

 rupted very lang-peduncled spike, reddish. Dry soil, from Del. and Va. to 

 Fla. and Miss. 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 titan the leaves, 2 - 4-flowered , flowers reddish- 

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



18. INDIGOFERA, L. INDIGO. 



Calyx small, equally 5-cleft. Standard roundish, silky outside, wings 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-pinnate 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. leptosdpala, Nutt. A perennial herb, i-2 high; leaflets 5-9, 

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

 reflexed, 1' long. Kan. to Tex. and Fla. 



