MIMOSACEAE. 45 



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

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



Stamens numerous, more than 10 : petals united. 



Filaments partially united into a tube : corolla and calyx 



unlike. 

 Pods contorted and spiral : seeds arillate : leaves few- 



foliolate. 1. PITHECOLOBU-M. 



Pods straight: seeds not arillate: leaves many-foliolate. 2. ALBIZZIA. 

 Filaments distinct : corolla like the calyx, but longer. 



Ovary stipitate : petals partly 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 2 separate rows. 4. VACHELLIA. 

 Stamens as many as the petals: petals distinct. .">. I.KTCAENA. 



1. PITHECOLOBRIUM Mart. Shrubs or trees. Leaves 2-pinnate: leaf- 

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

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

 year. 



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



1. P. Unguis-cati. 

 Ovary pubescent, longer than the stipe : petioles shorter than 



the petiolules. 2. P. guadelupense. 



1. P. Unguis-Cati (L.) Benth. Unarmed 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. -CAT 'S-CLAW. 



Hammocks, E. Keys, lower w. coast, and F. Keys. (W. I.) 



2. P. guadelupense 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: 

 pods short-stipitate. BLACK-BEAD. 



Pinelands and hammocks, E. Keys and F. Keys. (W. I.) 



2. ALBIZZIA Durazz. Shrubs or trees. Leaves 2-pinnate: leaflets 

 numerous. Spikes capitate. Calyx-lobes relatively short and small. Corolla 

 about twice as long as the calyx. Pod linear, flat. 



1. A. Julibrissin (Willd.) Durazz. Shrub or tree becoming 10 m. tall: leaves 

 with 16-24 pinnae; leaflets 50-70, the blades falcate-lanceolate, 7-16 mm. 

 long, obliquely acute: calyx about 2 mm. long: corolla 6-8 mm. long; larger 

 lobes ovate: pods broadly linear, 10-15 cm. long: seeds oblong, 3.5-4.5 mm. 

 wide. JULIBRISSIN. ACACIA. 



Woods and fields, nearly throughout Fla. Nat. of Asia. (Cont., W. I.) 

 Spr.-sum. 



3. ACACIA [Tourn.] L. Shrubs or trees, or sometimes herbs. Leaves 

 mostly 2-pinnate, sometimes reduced to phyllodia: leaflets usually numerous. 

 Spikes capitate or cylindric. Calyx cupulate or resembling the corolla. Petals 

 distinct or partially united. Filaments distinct, or some of them slightly 

 united at the base. Pods flat. 



1. A. angustissima (Mill.) Kuntze. Shrub with hirsute foliage: leaf -pinnae 

 mostly 10-30: leaflets very numerous; blades oblong or narrowly oblong, 4-5 

 mm. long: calyx less than 1 mm. long; lobes deltoid, acute: corolla 2-2.5 mm. 

 long: pods linear-oblong, 3-4 cm. long, 6-9 mm. wide. [A. filicioides (Cav.) 

 Trelease.] ACACIA. 



Pinelands, pen. Fla. (Cont.) 



