126 FOUNDATIONS OF BOTANY 
XIV. PSORALEA, L. 
Perennial herbs ; whole plant glandular-dotted. Leaves of 
3-5 leaflets ; stipules cohering with the petioles. Flowers in 
axillary or terminal spikes or racemes. Calyx 5-cleft, the 
lobes nearly equal. Standard ovate or orbicular, keel 
incurved, obtuse. Stamens monadelphous or diadelphous, 
5 of the anthers often undeveloped. Ovary nearly sessile. 
Pod included in the calyx, often wrinkled, remaining closed, 
1-seeded.* 
1. P. melilotoides, Michx. SAmson’s SNAKEROOT. Stem erect, 
slender, branching above, downy, 1-2 ft. high. Leaves of 3 leaflets ; 
petioles shorter than the leaflets; stipules awl-shaped; leaflets 
elliptical or oblong-lanceolate, sparingly glandular-dotted, the termi- 
nal one stalked. Loosely flowered spikes axillary and terminal, on 
peduncles much longer than the leaves. Flowers blue or purple, 
about 4 in. long. Pod compressed-globose, wrinkled transversely. 
Dry soil.* 
2. P. tenuiflora, Pursh. Upright, slender, bushy and branching, 
2-4 ft. high, covered when young with a fine grayish down. Leaves 
palmately compound, with 3-5 linear to obovate-oblong leaflets, coy- 
ered with glandular dots. Flowers 1—} in. -long, loosely racemed. 
Pod rough with glands. Prairies, W. 
3. P. esculenta, Pursh. Pomme BLANcHeE, Trpsin, Dakota TuR- 
nip. Clothed with roughish hairs. Stem 5-15 in. high, erect and 
stout. Root turnip-shaped, starchy, eatable. Leaves palmately 
compound, with 5 lance-oblong leaflets. Flowers 4 in. long, in a ~ 
dense ellipsoidal spike. Pod hairy, with a pointed tip. High 
prairies or plains, especially N. W. 
XV. AMORPHA, L. 
Small shrubs, glandular-dotted. Leaves odd-pinnate. Flowers 
purple, blue, or white, in slender spikes or racemes. Calyx 
5-toothed, persistent. Standard obovate, concave, wings and 
keel none. Stamens monadelphous, projecting much. Ovary 
sessile. Pod curved, glandular-roughened, 1—2-seeded, never 
opening.* 
1. A. fruticosa, L. Faust Inpigo. A shrub 6-15 ft. high, with 
smooth, dark-brown bark. Leaves petioled; leaflets 15-21, short- 
stalked, oblong, obtuse or notched, sparingly punctate with clear 
dots. Slender flowering spikes, panicled or solitary, 4-6 in. long. 
