ROSACEA. 619 



ACACIA, Necker. 



Flowers polygamous. Calyx 4 - 5-toothetl. 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 piniiately compound 

 leaves, and small flowers in spikes or heads. 



A. filicina, Willd. Herbaceous, unarmed, hirsute ; stem erect ; leaves 

 bipinnate ; leaflets 50-60, very small, oblong-linear; stipules deciduous; 

 heads peduncled, axillary and terminal; flowers white; "legume flat, few- 

 seeded." — Gainsville, Florida (Garber). — Stem simple, 2°-o° high. 



A. Farnesiana, Willd. (Opoponax.) Shrubby, spiny, glabrous ; pinnjE 

 about 6 pairs; leaflets 12-18 pairs, oblong-linear; stipular spines long, 

 straight; heads globose, on axillary single or clustered peduncles; flowers 

 3'ellow, fragrant ; legume terete, torulose. — Waste places. Introduced. 



A. Julibrissin, Willd. Arborescent, unarmed, glabrous; pinnae 8-12 

 pairs; leaflets about 30 pairs, oblong, oblique; heads in a terminal panicle; 

 flowers flesh-color ; stamens long-exserted ; legume flat, oblong, few-seeded. — 

 Roadsides. Introduced. 



LEUCJENA, Benth. 



Calyx 5-toothed. Stamens 10 ; anthers ovoid-oblong. Legume stipitato, 

 broadly linear, flat, 2-valved ; seeds compressed, transverse to the valves. — 

 Shrubs or trees. Leaves bipinnate. Flowers white, in globose heads. 



L. glauca, Benth. Unarmed, glabrous; pinna; 4-5 pairs; leaflets 12- 

 15 pairs, linear, distant, acute, glaucous beneath ; heads single or by pairs 

 on axillary peduncles; flowers white; legume linear, flat. — Keys of South 

 Florida (Ciirtiss). — A small tree. 



LYSILOMA, Benth. 



Flowers polygamous. Calyx 5-cleft. Corolla broadly funnel-shaped, the 

 lobes valvate. Stamens mostly 12-30, united at base, exserted ; anthers 

 minute, globose. Ovary sessile or nearly so, many-ovuled. Legume linear, 

 nearly straight, compressed, tlie valves at maturity separating from the per- 

 sistent margin. Seeds compressed, transverse. — Trees or shrubs. 



L. latisiliqua, Benth. Unarmed, glabrous ; pinnae 5 pairs ; leaflets 10 

 pairs, elliptical ; heads panicled ; flowers white; legume flat, strap-shaped, 

 stipitate, many-seeded. — South Florida {Garber, Curtiss). — A shrub or 

 small tree. Legume 6' long. 



Order ROSACE:^. 



SPIR^A, L. 



S. COrymbOSa, Raf. Leaves undivided, ovate, unequally serrate near 

 the tip, whitish beneath; corymb large, smooth, compound; flowers white; 

 follicle smooth. — Mountains of North Carolina and Georgia. June. — Shrub 

 1° - 2° high. Leaves 2' - 3' long. 



