lie LEGUMINOS^. (rULSE FAMII^Y.) 



M. I'UDiCA, L., the common Sensitive-Plant, is piirtially naturalized in 

 some localities. 



46. SCHEANKIA, Willd. 



Flowers polygamous. Calyx minute. Corolla funnel-shaped, 5-clcft. Sta- 

 mens 8-10, distinct, exserted. Legume not jointed, prickly, I-celled, many- 

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

 Perennial prostrate priclvly herbs, with bipinnate sensitive leaves, and pui-ple 

 flowers in globose axillary pedunclcd lieads. 



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

 beset with short and thick recurved prickles ; pinna; 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 peduncle ; seeds elliptical. — Pry sandy soil, Florida, 

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



2. S. angUStata, Ton-. & Gray. Stem, &,c. armed with scattered weak 

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

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

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

 long subulate smoothish point. 



Var. ? braehycarpa. Stem, &c. as in Ko. I ; leaflets oblong-linear ; pedun- 

 cles 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 ban'ens, 

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

 Legumes 4' -5' long. 



47. PITHECOIiOBIUM, Martius. 



Flowers perfect, rarely polygamous. Calyx tubular-campanulate, 4-.5-toothed. 

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

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

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

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

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



1. P. TTnguis-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 ; calyx-teeth short, ciliate ; 

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

 smooth. (Inga XJnguis-Cati, Willd.) — South Florida. — Leaflets 1'- 1^' long, 

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

 McFadi/en. ) 



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

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

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

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



