400 LEGUMINOS^. Schrankia. 



the young branches, petioles, and peduncles very strigose ; stipules ovate, 

 striate, persistent ; pinna about 5 yiuirs ; leaflets 10-14 pairs, oblong-linear, 

 nearly glabrous ; peduncles very long, solitary ; heads oblong when old ; 

 legumes broad, very hispid, 2-3-jointed, the lower margin sinnate, or often 

 by abortion 1-jointed. 



Banks of streams. Sec. Tampa Bay, also in East Florida, Dr. Leaven- 

 worth ! Banks of the Mississippi, Louisiana, Dr. Carpenter! Dr. Hale ! 

 Arkansas, Dr. Leavenworth ! Texas, Drummoiid ! ^•2nd Coll. 157, 158, 

 159.) July-Aug. — Stems extensively procumbent, occasionally armed with 

 a very few short recurved prickles : no prickles at the base of the petioles : 

 the branches, petioles &c., and sometimes the lower surface of the leaves, 

 very densely strigose with long whitish sc.ily hairs; when old, glabrous or 

 sparsely strigose. Leaflets obtuse, scarcely mucronate, inaequilateral, slightly 

 falcate. Peduncles 5-6 or sometimes 10 inches long. Heady at first globose ; 

 the flowers rose-color. Petals, especially when rather old, minutely rnuricate 

 towards llie summit externally. Legumes when of three joints oblong and 

 rather indistinctly jointed, when single-jointed ovate, oblique. — Allied appar- 

 ently to M. humilis, H. B. S^- K. 



t Doubtful Sjyecies. 



2. M. geminata (DC): stems diffuse and, with the petioles, aculeate; 

 leaves bipinnate, the pinnee 2-pairs, the leaflets 15-20 pairs ; heads axillary, 

 geminate. DC. prodr. 2. p. 426. 



Western coast of North America, Mocino {ic. ined.) Head like that of 

 M. pudica. Fruit unknown. DC. — There is probably some mistake con- 

 cerning the locality of this plant. We know of no Mimosaceous plant 

 indigenous to the Pacific coast within the limits of this work. 



62. SCHRANMA. Willd. sjicc. 4. p. 1041 ; DC. prodr. 2. p. 443. 



Flowers polygamous (perfect and staminate). Calyx urceolate, minute, 

 5-toothed. Petals united in an infundibuliform 5-cleft corolla. Stamens 

 8-10, or rarely 12, distinct or cohering at the base. Legume muricate- 

 echinate, dry, 1-celled, somewhat 4-sided, 4-valved by the separation of a 

 large replum from the (thinner and smaller valves,) many-seeded. — Peren- 

 nial prickly herbs, with bipinnate sensitive leaves. Stems procumbent, or 

 ascending. Flowers (rose-color or purplish) in spherical heads : peduncles 

 axillary, solitary or in pairs. 



1. S. uncinata (Willd.): stem 5-8-gTooved or angled: pinnje 6 pairs; 

 leaflets numerous, elliptical, reticulated with elevated veins beneath ; heads 

 niostly solitar_y, on peduncles mostly shorter than the leaves ; legunies ob- 

 long-linear, with a short acuminate point, very denselv echinate, as lone as or 

 often shorter than the peduncle ; seeds ellii)lical. — Willd. ! spec. 4. p. 1043 ; 

 Pursh,Jt. 1. p. 305; DC. I. c. ? Mimosa Intsia, Walt. Car. p. 252. M. 

 horridula, Michx. ! fl. 2. f. 254 ,• Vent, choir, t. 28. 



Drj'- sandy soil, Virginia to Florida ! Missouri ! Louisiana ! Arkansas ! 

 and Texas ! _ May-July. — Stem (2-4 feet long) petioles, and peduncles thick- 

 ly armed with strong uncinate prickles. Heads of flowers mostly rallier 

 large ; the peduncles sometimes 2-3 inches long. Legimies about 2 inches in 

 length, teretish, 4-7 usually ripening in each head. 



2. S. angustata : stem 5-8-grooved or angled ; pinn^e 4-6 pairs ; leaflets 



