LEGUMINOS^. (PULSE FAMILY.) 95 



12. WISTABIA, Nutt. 



Calyx campanulate, somewhat 2-lippecl ; the upper lip broad, 2-cleft, the lower 

 3-cleft. Vcxillum large, with 2 parallel ridges at the base. Stamens diadelphous 

 (9&1). Legume coriaceous, nearly terete, contracted between the seeds, at 

 length 2-valved. — Twining shrubs, witli unequally pinnate leaves, and showy 

 purple flowers, in a crowded raceme. 



1. W. frutescens, r)C. Young leaves and branches silky-pubescent; 

 leaflets 9-13, ovate-lanceolate or oblong; stipcls none; racemes on short 

 branches, dense-flowered. (Thyrsanthus frutescens, Ell ) — Margins of swamps, 

 Florida to North Carolina, and west to Mississippi, April and May. — Leaflets 

 riong. Racemes 4' -6' long, 2' -3' in diameter. Legume 1 -several-seeded. 

 Bracts large, caducous, 



13. TEPHROSIA, Pers. 



Calyx neai'ly equally .5-cleft or .5-toothed. Vcxillum large, roundish, spread- 

 ing or reflexcd, usually white within, and reddish or pur])lc and silky without; 

 keel obtuse, cohering with the wings. Stamens monadclplious or diadelphous. 

 Style smooth or laterally bearded. Legume compressed, linear, many-seeded. — 

 Perennial herbs, with unequally pinnate leaves, with the leaflets opposite mucro- 

 natc and straight-veined, and white or j)urplis]i flowers. 



* Flowers sinj/e or by jniirs in the arils of' the leares ; the vpj^ermost often ctvinkd in 



a dense raceme. 



1. T. Virginiana, Pers. (Goat's Rue.) Soft-hairy and somewhat 

 hoary; stems very leafy, clustered, ercot, simple; leaflets 11-25, oblong or 

 linear-oblong, acute or obtuse, smoothish above ; flowers yellowish-white tinged 

 with purple. — Dry jjinc ban-ens, Florida to Mississippi, and northward. June 

 and July. — Stems 1° - 2° high, from long and slender roots. Flowers showy. 



* * Flowers in loncf-peduncled racemes opjv?sile the leaves : 7-e.rillum pubescent 



c.rternulli/. 



2. T. spicata, Ton-. & Gray. Hirsute or villous with rusty hairs ; stems 

 simple or difl'usely branched; leaves scattered, siiort-petioled ; leaflets 9-1.5, 

 oval or cuneate-oblong, rounded and strongly mucronate at the apex, smooth- 

 ish above; racemes 2-3 times as long as the leaves, G-10-flowered ; lobes 

 of the calyx linear-subulate ; flowers large, white and purple. (T. paucifolia, 

 Nutt. Galega villosa, MicJix.) Varies with linear, acute, and reflexed leaflets, 

 the odd one elongated. — Dry soil, Florida to North Carolina, and westward. 

 June and July. — Stems 1° - 2° long. 



3. T. hispidula, Pursh. Iloary-pubescent or smoothish ; stems slender, 

 terete, erect or procumbent ; petiole shorter than the lowest leaflets ; leaflets 1 1 - 

 15, small (4" -6" long), oblong, acute or obtuse, often smooth above ; peduncles 

 slender, terete, commonly longer than the leaves, 2-4-flowered; flowers small, 

 purple, — Dry sandy soil, Florida to North Carolina, and westward. June and 

 July. — Stems 6' - 18' long. 



4. T. ehrysophylla, Pursh. Prostrate, rusty pubescent ; stems diflfusely 

 branched; leaves sessile or nearly so, short (I'-li' long) ; leaflets (yellowish) 



