LEGUMINOS.E. (pulse FAMILY.) 127 



2. S. Floridana, n. sp. Stem long, slender, 4-angled; leaves few and 

 distant, long-petioled ; pinna 2-3 pairs; leaflets 30-40, oblong-linear, niu- 

 cronate, 2" long ; peduncles single, shorter than the petioles ; legumes 3' - 4' 

 long, filiform, armed with few weali and scattered prickles, long-pointed. — 

 Sandy barrens, South Florida. 



* * Veins of the leaflets obscure on both surfaces. 



3. S. angustata, Torr. & Gray. Stem, etc. armed Avith scattered weak 

 recurved prickles; pinnaj 4-G pairs; leaflets about 30, linear-elliptical; pe- 

 duncles single or by pairs, much shorter than the leaves; legume narrow-lin- 

 ear, 3-4 times as long as the peduncle, ending in a long subulate smoothish 

 point. 



4. S. horridula, (Michx.?). Stem prostrate, very prickly ; pinnae 5-8 

 pairs ; leaflets 30-40, linear, \" long; peduncles single, or 2-4 in a cluster, 

 the uppermost often racemed ; legume terete, V-2' long, thickly armed with 

 strong prickles, broadly linear, abruptly short-pointed, mostly shorter than 

 the peduncle. (Mimosa, J//cAa:.) — Dry piue barrens in the lower districts. 

 July -August. 



Var.? angularis. Stouter and less prickly; leaflets longer (2" long) ; 

 legume 4-angled, armed with scattered prickles, longer than the peduncle. — 

 Dry open woods in the upper districts. July. 



50. PITHECOLOBIUM, Martins. 



Flowers perfect, rarely polygamous. Calyx tubular-campauulate, 4-5- 

 toothed. Corolla tnbular-funnel-shaped, 4-5-cleft. Stamens 10 or more, 

 long-exserted, monadelphous near the base. Style filiform. Legume broadly 

 linear, compressed, contorted or falcate, 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. Unguis-Cati, Benth. L'namied or spiny; leaves bipinnate; 

 leaflets 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 yellowish, smooth ; stamens crispid, twice as long as the 

 corolla; ovary smooth. (Inga, Willd.) — South Florida. — Leaflets I'-l^' 

 long, light green. 



2. P, Guadalupense, Chapm. Unarmed ; leaves bipinnate ; leaflets 

 4, coriaceous, obliquely 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 as the corolla; ovary pubescent; legume smooth, falcate or hooked. 

 (Inga, Desv.) — South Florida. — Leaflets 1' long, deep green. Legume 2'- 

 4' long. Flowers yellowish. 



51. ACACIA, Necker. 



Flowers polygamous. Calyx 4 - 5-toothed. Petals 4-5, separate or united 

 in a tube. Stamens numerous, inserted on the base of the corolla. Legume 

 2-valved, many-seeded. — Mostly trees or shrubs, with pinnately compound 



