100 BUESEEACEAE. 



Fruit drupaceous : flowering panicles erect. 



Carpels becoming distinct, forming simple, drupes : leaf-blades equally pinnate. 



1. SiMAROUBA. 



Carpels permanently united, forming a berry : leaf-blades un- 

 equally pinnate. " 2. 1>icu.\mnia. 

 Fruit samaroid : flowering racemes drooping. 3. Alvakadoa. 



1. SIMAKOUBA Aubl. Trees. Leaf-blades abruptly pinnate, the leaflets 

 thick. Flowers monoecious or dioecious, paniculate. Sepals 4 or 5, short. 

 Petals 4 or 5, much larger than the sepals, imbricate. Stamens 8 or 10, each 

 with a fringed appendage at the base. Ovary 4-5-celled, scarcely lobed at the 

 apex: style very short. Fruit a cluster of 5, or fewer, drupes, with the style- 

 base lateral. 



1. S. glauca DC. Tree sometimes 16 dm. tall: leaflets 6-12; blades oblong or 

 nearly so, 4-8 cm. long, entire: drupes oval, about 2 cm. long, scarlet or dark- 

 purple. — Hammocks. — F. K. {Bah., Cuba, Ant.) — Paradise-tree. Bitter- 

 wood. 



2. PICRAMNIA Sw. Shrubs or trees. Leaf-blades unequally pinnate, 

 the leaflets thickish. Flowers dioecious, spicate or racemose. Sepals 3-5, 

 short. Petals 3-5, imbricate or wanting. Stamens 3-5, unappendaged. Ovary 

 2-3-celled, not lobed : style very short. Fruit a berry. 



1. P. pentandra Sw. Shrub or small tree : leaflets 5-7 ; blades elliptic to 

 oblong-elliptic, or rarely ovate, 5-10 cm. long, lustrous above: berries oblong, 

 10-15 mm. long. — Hammocks.— F. K. (Bah., Cuba, Ant.) — Bitterbush. 



3. ALVARADOA Liebm. Shrubs or trees. Leaf-blades unequally pin- 

 nate, the leaflets thinnish. Flowers dioecious, borne in spreading or drooping 

 racemes. Sepals 5, short. Petals wanting. Stamens 5, alternating with 5 

 staminodia. Ovary flattened or 3-angled, 2-3-celled, notched at the apex. 

 F^ruit capsular. 



1. A. amorphoides Liebm. Shrub or small tree: leaves approximate at the 

 ends of the branches; leaflets numerous, the blades 1-2 cm. long, those of the 

 lateral leaflets mostly oblong or oval: flowers numerous, slender-pedicelled : 

 sepals ovate, about 1.5 mm. long: filaments pubescent: capsules oblong or 

 ovate-oblong, 12-14 mm. long, ciliate, notched. — Hammocks. — (Bah., Cuba.) 



Family 7. BURSERACEAE. Torch-wood Family. 



Trees -with a resinous sap. Leaves alternate: blades pinnate, rarely 

 1-3-foliolate. Flowers perfect or polygamo-dioecious, racemose or panicu- 

 late. Calyx of 3-6 sepals. Corolla of 3-0 petals. Androecium of 6-12 

 stamens. Gynoecinm of 2-5 united carpels. Fruit drupaceous, the epi- 

 carp sometimes valvate. 



1. ELAPHRIUM Jacq. Trees. Leaves approximate at the ends of the 

 branches: leaflets thick. Sepals 4-6, imbricate. Petals 4-6, mostly valvate. 

 Stamens 8-12, erect. Ovary 3-5-celled. Drupe with a valvate epicarp. 

 [Bursera Jacq.] 



1. E. Simaruba (L.) Eose. Tree, becoming 20 m. tall: leaflets 3-7; blades 

 oval or elliptic, varying to ovate or obovate, 3-5 cm. long, entire: racemes 5-10 

 cm. long: i^etals 2-2.5 mm. long: drupes oblong, 8-11 mm. long, or rarely 

 smaller, the epicarp 3-valved. [B. Simaruha (L.) Sarg.]— Hammocks.— F. K. 

 {Bah., Cuba, Ant.) — West Indian liiRCH. Gumbo-limbo. Gum Elemi. 



