MIMOSACEAE. 55 



1-4 dm. long: calyx becoming 3-3.5 cm. long: corolla reddish, longer than the 

 calyx; lobes lanceolate to narrowly ovate. Hammocks and cultivated grounds. 

 L. keys. Nat. of Asia. [E. K.] (Ber., Bah., Cuba, Ant.) LIFE-PLANT. 



FAMILY 2. AMYGDALACEAE. PLUM FAMILY. 



Shrubs or trees. Leaves alternate, with free, often early deciduous 

 stipules: blades simple, mostly toothed. Flowers perfect, in corymbs, 

 cymes, racemes, or panicles, sometimes clustered. Calyx of 5 sepals, borne 

 on the edge of the hypanthium, deciduous. Corolla of 5 petals. Androe- 

 cium of many stamens. Gynoecium of a single carpel, or rarely of 2 or 3 

 carpels. Ovary 1-celled: style entire. Fruit a drupe. 



Style basal : ovules erect. 



Inflorescence axillary : drupe with a fluted stone. 1. CHRYSOBAIAXCS. 



Inflorescence terminal : drupe with a terete stone. 2. GEOBALANUS. 



Style terminal : ovules pendulous. 3. LAUKOCEBASUS. 



1. CHRYSOBALANUS L. Shrubs or trees. Leaf-blades of an orbicular 

 or obovate type. Cymes axillary. Petals clawed. Filaments distinct or 

 nearly so. Stone of the fruit pointed at the base, ridged. 



1. C. Icaco L. Shrub, when growing on beaches, with radially creeping 

 branches, or a tree sometimes 10 m. tall : leaf -blades broadly obovate to orbicu- 

 lar-obovate, mostly 4-8.5 cm. long, typically retuse: sepals about 2.5 mm. 

 long: drupes globose or spheroidal, 3-4 cm. long, yellow, red, or purple: stone 

 broadly obovoid, blunt-ridged. Hammocks, U. S. Keys, U. keys, L. keys. 

 [E. K.] (Bah., Cuba, Ant.) COCOA-PLUM. 



2. GEOBALANUS Small. Shrubs, with underground stems. Leaf -blades 

 more elongate than in Chrysobalanus : cymes terminal. Petals not clawed. 

 Filaments markedly united. Stone of the fruit terete, not pointed at the base. 



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

 leaves oblanceolate to oblong, 3-12 cm. long, glabrous, obtuse or retuse and 

 mucronate: drupes ovoid to obovoid. Coastal sand-dunes, U. S. keys. GOPHER- 

 APPLE. GROUND-OAK. 



FAMILY 3. MIMOSACEAE. MIMOSA FAMILY. 



Herbs, shrubs, or trees. Leaves alternate : blades compound, usually 

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

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

 partially united sepals. Corolla of 3-6 equal, distinct or partially united 

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

 spicuously exserted. Gynoecium 1-carpellary. Fruit a legume. 



Stamens numerous, more than 10. 



Filaments partially united into a tube. 



Valves of the pod not separating from the continuous 



margin. 



Pods with thick-leathery valves, contorted. 1. PITHECOLOBICM. 



Pods with thin-leathery valves, not contorted. 2. AI.BIZZIA. 



Valves of the pod separating from the continuous margin. 3. LYSILOMA. 

 Filaments distinct, or the inner ones sometimes slightly 



united at the base. 4. VACHELLIA. 



