LEGUMINOS^E. ( PULSE FAMILY.) 95 



12. WISTARIA, Nutt. 



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

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

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

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

 purple flowers, in a crowded raceme. 



1. W. frutescens, DC. Young leaves and branches silky-pubescent; 

 leaflets 9-13, ovate-lanceolate or oblong; stipels 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 

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

 Bracts large, caducous. 



13. TEPHROSIA, Pers. 



Calyx nearly equally 5-cleft or 5-toothed. Vexillum large, roundish, spread- 

 ing or reflexcd, usually white within, and reddish or purple and silky without ; 

 keel obtuse, cohering with the wings. Stamens monadelphous or diadclphous. 

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

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

 nate apd straight-veined, and white or purplish flowers. 



* Flowers single or by pairs in the axils of the leaves; the uppermost often crowded in 



a dense raceme. 



1. T. Virginiana, Pers. (GOAT'S RUE.) Soft-hairy and somewhat 

 hoary ; stems very leafy, clustered, erect, simple ; leaflets 1 1 - 25, oblong or 

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

 Avith purple. Dry pine ban-ens, Florida to Mississippi, and northward. June 

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



* * Flowers in long-peduncled racemes opposite the leaves : vexillum pubescent 



externally. 



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

 simple or diffusely branched ; leaves scattered, short-petioled ; leaflets 9 - 15, 

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

 ish above; racemes 2-3 times as long as the leaves, 6-10-flowered ; lobes 

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

 Nutt. Galega villosa, Michx.) Varies with linear, acute, and rcflexed leaflets, 

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

 June and July. Stems 1 -2 long. 



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

 terete, erect or procumbent ; petiole shorter than the lowest leaflets ; leaflets 11- 

 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. chrysophylla, Pursh. Prostrate, rusty pubescent ; stems diffusely 

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



