IIG LKC.UMlNOS/i:. (I'VLSE I'AMILY.) 



M. ITDICA, L., llic cuiniiion Sensitivi^-Pi-ant, is ]);irii;ill_v natursili/i'il in 

 some localities. 



4G. GCHRANKIA, Will.l. 



Flowers polygamous. Calyx niiiiute. Corolla funiKl-sliapcd, 5-ck'ft. Sta- 

 mens 8-10, distinct, cxscrtcd. Legume not jointed, prickly, 1-celled, many- 

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

 Perennial i)rostrate jnickly herbs, with bi)iinnate sensitive loaves, and ])urple 

 flowers in globose axillary peduncled heads. 



1. S. unciuata, AVilld. Stem, petioles, peduncles, and legumes thickly 

 beset with short and thick recurved jirickles ; pinnae 5-6 pairs ; leaflets 26 - 30, 

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

 usually shorter than the leaves ; legume oblong-linear, with a short acuminate 

 point, about as long as the pedimcle ; 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 scattered weak 

 rccu^^'cd prickles ; piima; 4 -fi ])airs ; leaflets about 30, linear-elliptical, veinlcss, 

 or nearly so, on both sides ; peduncles single or by pnirs, much shorter than tlie 

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

 long subulate snioothisb point. 



Var. ? braehycarpa. Stem, &c. as in No. 1 ; leaflets oljlong-linear; pedun- 

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

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

 often branching prickles, about as long as tlie ]H'duricle — Dry pine ban-ens, 

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

 Legumes 4' -5' long. 



47. PITHECOLOBIUM, Martins. 



Flowers perfect, rarely polygamous. Calj'x tubular-campanulatc, 4-,')-toothcd. 

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

 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 stipnlar spines. Leaves 

 pinnate or bipinnate. Flowers chiefly capitate, axillary and terminal. 



1. P. Unguis-Cati, Benth. Unarmed or spiny ; leaves bipinnate; leaf- 

 lets 4, thin, broadly and obliquely obovate, the partial petioles much shorter than 

 the common one ; heads globose, in a loose raceme ; calyxteeth short, ciliate ; 

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

 smooth. (Inga Unguis-Cati, Wllld.) — South Florida. — Leaflets 1'- U' long, 

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

 McFuclijen.) 



2. P. Guadalupense. Unarmed ; leaves bipinnate ; leaflets 4, coria- 

 ceous, oblitiuely oblong or obovate, the common and partial petioles nearly 

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

 racemose ; calyx and corolla pubescent ; stamens 30 or more, 3-4 times as long 



