18 
DESCRIPTION OF MEDICINAL PLANTS. 
erect 1-2° high, somewhat pubescent. Leaves pinnately 3- 
foliolate; leaflets lanceolate or narrowly oblong. Flowers 
spiked; spikes oblong, long- peduncled. Corolla truly 
papilionaceous; stipules awl-shaped; bracts ovate or lanceo- 
late, taper- pointed ; pods strongly wrinkled transversely. 
FI. July-August. The root is used in domestic practice. 
Robinia Pseudacacia, L. Black Locust. Large tree 50-80° 
high, branches not prickly. Leaves odd-pinnate, the ovate 
leaflets stipellate. Flowers showy, in hanging axillary 
racemes, white, fragrant, pod smooth. A valuable timber- 
tree. The bark. 
Gleditchia triacanthos, L. Honey Locust. Thorny tree with 
large and spreading thorns. The thorns are stout, often 
triple or compound. Leaves once or twice pinnate, leaf- 
lets lanceolate oblong, somewhat serrate ; pods elongated 
1-lip long, often twisted, filled with sweet pulp between the 
seeds. Flowers inconspicuous, greenish in small spikes. 
June. The foliage, collected early. 
Tephrosia Virginiana, Pers. Goat’s Rue. Catgut. Hoary pe- 
rennial herbs, with odd-pinnate leaves. 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 terminal oblong dense 
raceme or panicle, yellowish-white, marked with purple. 
Dry, silicious soils, in magnesian limestone region or so- 
called gravelly-hill lands, where the blackjack oak and 
chestnuts constitute the timber growth, in inexhaustible 
quantities. FI. June-July. Root collected in fall. 
Stylosanthes elatior, Swartz. Pencil Flower. Low perennials, 
branched from the base, with wiry stems, pinnately 3- foliolate 
leaves, the sheathiug stipules united to the petioles, no stipels, 
and small yellow flowers in terminal heads or short spikes. 
The leaflets are lanceolate and straight- veined. Calyx early 
deciduous; tube slender and stalk-like ; limb unequally 4-5 
cleft, the lower lobe more distinct. Pod 1-2 jointed, small 
and short, reticulated. In dry barrens as frequent as the for- 
