MIMOSACEAE. 81 



1. G. oblongifolius (Micbx.) Small. Plants 1-3 dm. tall: blades of the upper 

 leaves oblaiiceolate to oblong, 3-12 om. long, glabrous, obtuse or retuse and 

 mucronate: drupes ovoid to obovoid.- — Coastal sand-dunes. 



2. G. pallidus Small. Similar to G. ohlongifoUus in habit: blades of the 

 upper leaves elliptic to oblong, 4-10 cm. long, acute, densely white-tomentose 

 beneath, the hairs partly deciduous: drupes subglobose. — Pinelands. 



3. LAUROCERASUS Heicheub. Shrul)s or trees. Leaves persistent, 

 copiously impregnated with prussic acid. Flowers in axillary racemes. Hy- 

 panthium white. Sepals minute. Petals more or less angulate. Drupe with 

 a dry exooarp. 



1. L. myrtifolia (L.) Brittou. Tree becoming IG m. tall: leaf-blades elliptic 

 or oval: racemes loosely flowered, the pedicels slender: petals slightly angled: 

 drupes 8-12 mm. in diameter: stone sphaeroidal. [L. sphaerocarpa (Sw.) 

 Roem.] — Hammocks. — {Bah., Cuba, Ant.) — West-indian cherry. 



Family 3. MIMOSACEAE. Mimosa Family. 



Herbs, sliru])s, or trees. Leaves alternate : blades compound, usually 

 2-3-pinnate : stipules sometimes spine-like. Flowers mostly perfect, bome 

 in capitate or elongate usually dense spikes or racemes. Calyx of 3-6 

 partially united sepals. Corolla of 3-G equal, distinct or partially united 

 petals. Androecium of 3-6, or many, stamens which are usually con- 

 spicuously exserted. Gynoeciuni 1-carpellary. Fniit a legume. 



Stamens numerous, more than 10. 



Filaments partially united into a tube. 



Valves of tlie pod not separating from the continuous 



margin. 1- I'lTnECOLOBicJL 



Valves of the pod separating from the continuous margin. 2. Lysiloma. 

 Filaments distinct, or the inner ones sometimes slightly 

 united at the base. 

 Ovary stipitate : petals distinct or united, commonly only 

 to below the middle : pods flat, dry, the seeds not in 

 two distinct rows. 3. Acacia. 



Ovary sessile : petals united into a tubular-funnelform, 

 shallowly lobed corolla : pods nearly terete or broader 

 than high, pulpy within, the seeds in two separate rows. 4. Vachellia. 

 Stamens as many as the petals or the corolla-lobes or twice as 

 many. 

 Anthers without glandular appendages at the top. 



Valves of the pod not separating from the continuous 



margin. .5. Leucaena. 



Valves of the pod separating from the continuous margin, ti. ISIorongia. 



Anthers, at least in the bud, topped by glandular appendages. 7. Neptdnia. 



1. PITHECOLOBIUM Mart. Shrubs or trees. Leaves 2-pinnate: leaflets 



few, often 4. Spikes capitate. Calyx-lobes minute. Corolla prominently 



lobed. Pods narrow, often pulpy within. Seeds with colored arils. 



Ovary glabrous, shorter than the stipe : petioles larger than the petiolules. 



1. P. L'nijuis-Cuti. 

 Ovary pubescent, larger than the stipe ; petioles shorter than 



the petiolules. '1. P. f/iKnlclupcnsis. 



1. P. Ungruis-Cati (L.) Benth. Tnarmed shrub or small tree: blades of the 

 leaflets thinnish, broadly obovate, oval, or suborbicular, 1-4.5 cm. long: calyx 

 1.5-2 mm. long; lobes wider than long, blunt: corolla 3.-5-4.5 mm. long: pods 

 long-stipitate. — Coastal sand-dunes. — F. K. (Bah., Cuba, Ant.) — Cat's-claw. 



2. P. giiadelupensis Chapm. Armed shrub or small spreading tree: blades of 

 the leaflets leathery, oblong to cuneate, oval or suborbicular, 3-7 cm. long: 

 calyx 2.5-3 mm. long; lobes longer than wide, acute: corolla 5-6 mm. long: 



Flora of Miami 6 



