2. D. leptólobus, Torr. & Gray. Pinnæ 5--8 pairs; leaflets 10--20 pairs; peduncles 1´ long or less; heads rather loose, stamens 5; _pods usually few, narrowly linear, erect_, 1--2´ long.--Central Kan. to Tex. 46. SCHRÁNKIA, Willd. SENSITIVE BRIAR. Flowers polygamous, regular. Calyx minute, 5-toothed. Petals united into a funnel-form 5-cleft corolla. Stamens 10--12, distinct, or the filaments united at base. Pods long and narrow, rough-prickly, several-seeded, 4-valved, i.e., the two narrow valves separating on each side from a thickened margin.--Perennial herbs, nearly related to the true Sensitive Plants (Mimosa); the procumbent stems and petioles recurved-prickly, with twice-pinnate sensitive leaves of many small leaflets, and axillary peduncles bearing round heads of small rose-colored flowers. (Named for _F. P. Schrank_, a German botanist.) 1. S. uncinàta, Willd. Prickles hooked; pinnæ 4--6 pairs; _leaflets elliptical, reticulated_ with strong veins beneath; pods oblong-linear, nearly terete-short-pointed, densely prickly (2´ long).--Dry sandy soil, Va. to Fla., west to S. Ill., Kan., and Tex. 2. S. angustàta, Torr. & Gray. _Leaflets oblong-linear, scarcely veined_; pods slender, taper-pointed, sparingly prickly (about 4´ long).--S. Va. (?) to Fla., Tenn., and Tex. ORDER 33. ROSÀCEÆ. (ROSE FAMILY.) _Plants with regular flowers, numerous (rarely few) distinct stamens inserted on the calyx, and 1--many pistils, which are quite distinct, or (in the last tribe) united and combined with the calyx tube. Seeds (anatropous) 1--few in each ovary, almost always without albumen. Embryo straight, with large and thick cotyledons. Leaves alternate, with stipules_, these sometimes caducous, rarely obsolete or wanting.--Calyx of 5 or rarely 3--4--8 sepals (the odd one superior), united at the base, often appearing double by a row of bractlets outside. Petals as many as the sepals (rarely wanting), mostly imbricated in the bud, and inserted with the stamens on the edge of a disk that lines the calyx tube. Trees, shrubs, or herbs.--A large and important order, almost destitute of noxious qualities, and producing the most valuable fruits. Very intimately connected with Leguminosæ on one hand, and with Saxifragaceæ on the other. I. Ovary superior and not enclosed in the calyx tube at maturity. [*] Calyx deciduous, without bractlets, pistil solitary, becoming a drupe. Tribe I. PRUNEÆ. Trees or shrubs, with simple mostly serrate leaves. Ovules 2, pendulous, but seed almost always solitary. Style terminal. 1. Prunus. Flowers perfect. Lobes of calyx and corolla 5. Stone of the drupe bony. [*][*] Calyx mostly persistent; pistils few to many (rarely solitary). [+] Calyx without bractlets; ovules 2--many. Tribe II. SPIRÆEÆ. Pistils mostly 5, becoming 2--several seeded follicles. Shrubs or perennial herbs. [a.] Calyx short, 5 cleft. Petals obovate, equal.