LEGUMINOSE. (PULSE FAMILY.) 93 
8. PETALOSTEMON, Michx. 
Calyx nearly equally 5-toothed or 5-cleft. Petals almost regular, on filiform 
claws, four of them united with the tube of stamens, the fifth free, cordate or 
oblong, folded. Stamens 5, united into a cleft tube. Ovary 2-ovuled. Legume 
indehiscent, 1-seeded, included in the calyx. — Perennial glandular herbs, with 
unequally pinnate leaves, and white or purple flowers in terminal spikes or 
heads. : 
* Spikes solitary. 
1. P. gracile, Nutt. Stems decumbent, virgate; leaflets 5-7, oblong- 
linear, obtuse; spikes oval, becoming cylindrical in fruit, peduncled ; vexillum 
broadly cordate — Low pine barrens, Florida and westward. August.— Stems 
2° long. Leaflets }/ long. Flowers white. j 
2. P. carneum, Michx. Stems erect, much brinchoà; very leafy ; leaf- 
lets 5-7, linear, acute; spikes oblong, long-peduncled ; vexillum oblong. — Dry 
sandy soil Florida and Georgia, westward. — Stems 2°-3° high. Flowers 
white or reddish. 
* ** Spikes corymbose. 
3. P. corymbosum, Michx. Stems clustered, erect, very leafy ; leaflets 
3-7, filiform ; teeth of the calyx setaceous, plumose; vexillum oblong. — Va- 
ries with more numerous (11-15) oblong leaflets which are commonly emargi- 
nate at the apex. — Dry pine barrens, Florida to North Carolina, and westward ; 
the variety in the low country of South — COMM Sept. and Visi 
Stems 29 high. Flowers white. and 
9. DALEA, L. 
Calyx 5-cleft. Corolla imperfectly papilionaceous ; petals clawed ; four of 
them united with the tube of stamens below the middle, the fifth (vexillum) free, 
cordate, and inserted into the bottom of the calyx. Stamens 10, united into a 
cleft tube. Legume 1-seeded, membranaceous, indehiscent, included in the calyx. 
— Mostly glandular herbs, with spiked or capitate flowers. 
1. D. alopecuroides, Willd. Stem erect, smooth; leaves pinnate, with 
numerous linear-oblong leaflets; spikes dense, cylindrical, silky-villous ; corolla 
small, pale violet, the vexillum white.— Rich soil, Alabama, northward and 
— i duly. — Stem 1? -2? high. gina ee 
10. AMORPHA, L. 
Calyx obconical, 5-toothed, persistent, Vexillum straight, concave. Wings 
and keel none. Stamens monadelphous at the base, exserted. Legume 1-2- . 
seeded, oblong, curved, glandular-roughened, indehiscent or nearly so. — Shrubs, — 
With unequally pinnate leaves, and numerous leaflets which are punctate wa 
pelluciq iie Flowers blue or white, in slender racemes or spikes. E 
