LEGUMINOS.E. (PULSE FAMILY^) 127 



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

 distant, loug-petioled ; pinna? 2-3 pairs; leaflets 30-40, oblong-linear, mu- 

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

 long, filiform, armed with few weak 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 with scattered weak 

 recurved prickles; pinnae 4-6 pairs; leaflets about 30, linear-elliptical; pe- 

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

 ear, 3-4 tiines 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, 1" long; peduncles single, or 2-4 in a cluster, 

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

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

 the peduncle. (Mimosa, Michx.) Dry pine barrens iu the lower districts. 

 July- August. 



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

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

 Dry opeu woods in the upper districts. July. 



50. PITHECOLOBIUM, Martius. 



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

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

 loug-exserted, munadelplious 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 bipiunate. Flowers chiefly capitate, axillarv and 

 terminal. 



1. P. Unguis-Cati, Benth. Unarmed 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 ; calvx teeth 

 short, ciliate ; corolla yellowish, smooth ; stamens crispid, twice as long as the 

 corolla; ovary smooth. (Inga, Willd.) South Florida. Leaflets l'-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, 7>,sv.) 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 



