116 LEGUMINOS/E. (iTLSE lAMILY.) 



M. PL'DiCA, L., the common Sexsitive-Plaxt, is j):iriially naturnli/id in 

 8umc localities. 



46. SCHRANKIA, M'ill.l. 



Flowers polygamous. Calyx minute. Corolla funnel-sliapcd, 5-cleft. Sta- 

 mens 8-10, di.stiiu't, cxscrted. Legume not jointed, prickly, 1-celled, many- 

 seeded ; the narrow valves separating at maturity from the broad margins. — 

 Perennial ])rostratc ])rickly herbs, witli liipinnate sensitive leaves, and purple 

 flowers in globose axillary pcduncled heads. 



1. S. uncinata, WiUd. Stem, petioles, peduncles, and legumes thickly 

 beset with short and tliick recurved prickles ; pinnos 5-6 pairs ; leaflets 20 - 30, 

 elliptical, reticulated with elevated veins beneath ; peduncles mostly solitary, 

 usually shorter tlian the leaves ; legume oblong-linear, witli a short acuminate 

 point, about as long as the peduncle ; seeds elliptical. — Dry sandy soil, Florida, 

 and westward. June -August. — Stem 2° -4° long. Legume 2' long. 



2. S. angUStata, Torr. & Gray. Stem, &.c. armed with SQittcrcd weak 

 recurved prickles ; piimro 4-6 pairs ; leaflets about 30, linear-elliptical, veinless, 

 or nearly so, on both sides ; peduncles single or by pairs, much shorter tlian the 

 leaves; legume narrow-linear, 3 -4 times as long as the ])cdunclc, ending in a 

 long subulate smoothish point. 



Var. ■? brachycai'pa. Stem, &c. as in No. 1 ; leaflets oblong-linear ; pedan- 

 clcs single or 2-4 in a cluster, the upper ones longer than the leaves; legumes 

 (2' -3' long) broadly linear, abruptly slender-pointed, densely armed with strong 

 often branching prickles, about as long as the peduncle. — Dry pine barrens, 

 Florida to North Carolina, and westward. Juno - August. — Stem 2° - 5° long. 

 Legumes 4' -5' long. 



47. PITHECOLOBIUM, Martius. 



Flowers perfect, rarely polygamous. Calyx tubular-cam])anulatc, 4-.')-foothed. 

 Corolla tubular-funnel-shaped, 4 -5-cleft. Stamens 10 or more, long exsertcd, 

 monadelphous near the base. Style filiform. Legume broadly linear, com- 

 pressed, contorted or falcate, transversely partitioned, mealy or pulpy within. 

 Seeds lenticular. — Trees or shrubs, often armed with stipular spines. Leaves 

 pinnate or bi])innate. Flowers chiefly capitate, axillary and terminal. 



1. P. TJnguis-Cati, Benth. Unarmed or sjiiny ; leaves bipiniiafe ; leaf- 

 lets 4, thin, broadly and obliquely obovate, the partial j)etiolcs much shorter than 

 the common one ; heads globose, in a loose raceme ; calyx-teeth siiort, ciliate ; 

 corolla yellowish, smooth ; stamens crisped, twice as long as the corolla; ovary 

 smooth. (Inga iMiguis-Cati, Wllld.) — South Florida. — T-caflets 1'- Ij' long, 

 light green. (Legume spirally twisted, 5 - 6-seeded, white, and fleshy within. 

 MuFodi/cn.) 



2. P. Guadalupcnse. Unarmed ; leaves bipinnato ; leaflets 4, coria- 

 ceous, oblicpielv olilong or obovate, tlic common nnd jiartini jieiioles nearly 

 equal ; peduncles solitary, nxillary, longer than tlic leaves, or the upper ones 

 racemose; calvx and corolla pul)eseent ; stamens 30 or more, ;i-4 limes as long 



