214 B. F. Bush. 
stouter and longer than the peduncles, commonly considerably exceeding 
them and mostly from the base of the stem; leaflets 5, digitate, short- 
stalked, broadly obovate, with a cuneate base, obtuse and rounded at the 
apex, cuspidate tipped, very pubescent beneath with long, shaggy white 
hairs, sparsely so above, 3,5—6 em long, and 2—2,75 cm wide; peduncles 
from the base of the stem, 5—10 cm long, commonly reclining or re- 
curving; spikes many, oblong, dense, 5—8 cm long, 2,5—4 cm thick, 
very many flowered; bracts lanceolate, shorter than the calyx-tube, about 
7,5 mm or less long: calyx teeth subulate, 6—10 mm long; pod oblong, 
4—5 mm long, nearly smooth, tipped with a long, densely hairy subulate 
beak, which is 12—15 mm long. 
Dry sandy soil along streams, eastern and central Texas. Summer. 
P. subulata is allied perhaps more nearly to P. hypogaea Nutt., but is 
abundantly distinct from that species in the larger differently shaped 
leaflets, larger and longer spikes, and different habitat, P. hypopaea Nutt. 
growing on the rich prairies about Dallas. It is easily distinguished 
from P. esculenta Pursh, by its nearly acaulescent habit, differently shaped 
leaflets, larger and stouter petioles, different habitat, and the long sub- 
ulate beak of the pod. 
Specimens examined: Texas: Dallas County, Bush 697, May 10, 
1900, type: Hempstead, Hall 1350, June 28, 1872. 
4. Psoralea palustris B. F. Bush, |. c., p. 121. 
Perennial from a deep elongated tuber. Stems 6—9 dm tall, slender, 
erect, simple, unbranched, strigose-hirsute: stipules linear-subulate; leaflets 
3, the blades lanceolate to narrowly oblong, strigose-hirsute, 4—7 cm 
long, and 1—1,5 cm wide, rugose-veiny, acutish; peduncles 5—10 cm 
long, as long as or longer than the subtending leaves, equalling or ex- 
ceeding the racemes in length; racemes 4—5 cm long, not elongating in 
fruit; pedicels of the flowers 3—6 mm long; tube of the calyx campanu- 
late, thickly glandular-dotted; corolla 6 -9 mm long, deep purple; bracts 
linear-aristate; pods suborbicular, apiculate by the style, 4—5 mm long, 
strongly transversely wrinkled, scarcely margined, thickly glandular-dotted. 
Sandy swamps, eastern Texas. Summer. 
This species differs from P. pedunculata (Muhl.) Vail, in the taller, 
unbranched stems, more strigose foliage, larger and longer leaves, longer 
pedicels of the flowers, lax racemes, shorter peduncles, and especially 
in the marshy habitat, and in the large deep purple flowers which are 
produced much later in the season, P. pedunculata (Muhl.) Vail flowering - 
more than a month earlier in the same locality. 
Specimens examined: Texas: Lindale, Reverchon 3175, May 15. 
1902, type; 3016, June 9, 1902; Big Sandy, Reverchon 2658, May 19, 1901. 
5. Tragia nigricans B. F. Bush, l. c., p. 122. 
Perennial, bright green, smooth and glabrous, turning blackish in 
drying. Stem slender, erect, 2,5- 4,5 cm tall, simple or few-branched; 
leaves thickish, oblong or oblong-lanceolate, deeply dentate or laciniate, 
sometimes lobed, acute at the apex and base, short-petioled, or the upper- 
