LEGUMINOS^. (pulse FAMILY.) 109 



thers alternately oblong and globose. Legume compressed, with 2-5 round- 

 ish hispid joints. — Herbs. Leaves palmately 2-4-foliolate. Stipules sagit- 

 tate. Flowers yellow, in axillary large-bracted racemes. 



1. Z. tetraphylla, Michx. Perennial, smooth or downy; leaflets 4, 

 lanceolate or oblong- obovate ; racemes 3 -9-flowered, much longer thau the 

 leaves ; the flowers distant and almost concealed by the large ovate bracts ; 

 legume hispid, 3-4-jointed. — Dry sandy soil, Florida to North Carolina, and 

 westward. June - August. — Stem 2° long, prostrate. 



21. STYLOSANTHES, Swartz 



Flowers of two kinds : one perfect, but sterile ; the other destitute of calyx, 

 corolla, and stamens, and fertile. Calyx 2-bracted, 2-lipped, 5-cleft ; the tube 

 long and slender. Corolla inserted on the throat of the calyx. Keel entire 

 at the apex. Stamens monadelplious, with the alternate anthers linear and 

 ovate. Style of the fertile flower hooked. Legume veiny, 1 - 2-jointed, the 

 lower joint empty. — Low herbs. Leaves trifoliolate. Stipules united with 

 the petioles. Flowers in a short and dense terminal spike. 



1. S. elatior, Swartz. Perennial; stem mostly erect, 6'- 12' high, pu- 

 bescent in lines, or sometimes hispid ; leaflets rigid, lanceolate, strongly 

 veined; stipules sheathing; spike few-flowered; bracts bristly; flowers yel- 

 low; legume compressed. — Sandy pine barrens. June -August. 



Var. procumbens, Purshl Stems procumbent, 1°- 2° long; leaflets 

 ovate-lanceolate, 3" - 4" long ; legumes nearly globose, obscurely ribbed. — 

 Sandy woods. West Florida. 



22. CHAPMANIA, Torr. & Gray. 



Flowers perfect, but sterile, and imperfect and fertile. Sterile Floioer. 

 Calyx turbinate, 5-cleft. Petals 5, the vexillum and wings nearly equal, 

 broadly obovate, the keel straight, convolute, enclosing the stamens and 

 pistil. Stamens 10, monadelplious below the middle, shorter than the abor- 

 tive pistil. Fertile Flower. Petals and stamens none. Style short and 

 curved. Legume 1 -4-jointed, the joints I-seeded. Seed suspended. — An 

 erect perennial herb, from tuber-liearing roots. Stem mostly simple, 2° -3° 

 high, hirsute. Leaves unequally pinnate, with setaceous stipules ; leaflets 

 5-7, oblong or obovate, -I'- 1' long. Flowers in short 2-3-flowered spikes, 

 at the leafless summit of the stem. Calyx glandular-viscid. Petals fuga- 

 cious, f long, yellow. 



1. C. Floridana, Torr. & Gray. — Dry sandy pine barrens. South Flor- 

 ida, ^lay- July. — Flowers expanding briefly in early morning. 



23. LESPEDEZA, Michx. Bush Clover. 



Calyx 2-bracted, 5-cleft; the teeth subulate. Corolla inserted on the base 

 of the calyx. Stamens diadelphous (9 & 1). Anthers alike. Legume small, 

 lenticular, indehiscent, 1-seeded. — Perennial herbs (except No. 5), with tri- 

 foliolate leaves, and small flowers in axillary racemes or spikes. 



