TEREBINTHACEiE. 173 



1. HEDYOSMUM, Sw. 



Flowers $ monandrous, ebracteate, amentaceous, 9 bracteate, spicate. Pericarp dru- 

 paceous. — Shrubs ; leaves serrate. 



1. H. nutans, Sw. Leaves lanceolate-linear, acuminate, serrate beyond the base, gla- 

 brous, shortly petioled : inflorescence monoecious ; $ aments ovoid-oblong, blunt, nodding ; 

 ? flowers alternate along the angular brauchlets of the 3-many-partcd corymbs.— Sw. II. 



t. 18./. sup.~ Leaves 5"-3" long, 10"'-8"' broad : petiole 3"' long, as long as the sheath. 

 — Hab. Jamaica !, all coll., in mountain-woods at 1000'-4000' alt. 



2. H. arborescens, Sw. Leaves elliptical-lanceolate with a bluntish point, serrate be- 

 yond the middle or the base, glabrous, petioled ; inflorescence unisexual ; (?...;? 

 flowers clustered : clusters opposite in interrupted, trifid spikes, the lateral branches of which 

 are exceeded by the central one.— A high shrub, 12'-16' high; leaves 4"-2" long, 18"'-8'" 

 broad : petiole 8"'-4'" long, as long as the sheath.— Hab. Jamaica !, Mac/., Pd., March, 

 in mountain-woods ; Dominica !, Imr. 



LX. TEEEBINTHACE^. 



Stamens bi-uniseriate, inserted into or below a disc. Pistil syncarpous or reduced, often 

 with a single ovary-cell developed : ovules 1-2 in each cell. Pericarp usually drupaceous. 

 Embryo exalbuminous. — Woody plants 5 leaves usually compound: stipules abortive. 



The bark contains resin, balsam, or gum, but the leaves are generally devoid of pellucid 

 dots (with the exception of Amyris). In several genera the fruit is eatable (Manyifera, 

 Anacardium, Spondias), while the milk of other is poisonous (Comocladia). Rhus and As- 

 tronium afford good timber ; the furniture-wood of Astr. obliquum resembles mahogany. 



Tbibe I. BVRSERACEM. — Ovary-cells 5-1, all ovuliferous: ovules 2 in each cell. 



1. BURSERA, L. 



Flowers polygamous. Calyx 3-5-partite. Petals 3-5, valvate. Stamens 6-10, peri- 

 gynous : anthers oblong. Ovary 3-celled : style 3-lobed at the top. Pericarp drupaceous, 

 3-(2)-valved, 1-seeded usually by abortion. Cotyledons corrugate. — Gummiferous trees ; 

 leaves impari-pinnate or unifoliolate : leaflets quite entire, petiolulate ; racemes axillary 

 and terminal : flowers fascicled. 



1. B. gummifera, L. Leaflets 9-3 (13-1), ovate-oblong, usually pointleted, hairy 

 beneath or glabrate j flowers precocious ; putamen ovate, blunt, 3-gonal : facets convex. — 

 SI. t. 199./. 1, 2; Jacq. Amer. Pict. t. 96; Desc. Fl. 2. t. 97.— B. acuminata, W. B. 

 simplicifolia, DC. ? — A lofty tree, from all parts of which gum resin exudes on the slightest 

 touch ; leaflets variable, usually 3" long ; petals oblong, 1'" long, much exceeding the calyx ; 

 putamen 3'" long, with a prominulous, ovate area (1$"' long) on the inner side. 



o. Rhachis of the racemes villous-pubescent. 



0. glabrata. Rhachis glabrous. 



Hab. Bahamas ! ; Jamaica !, M'Nab, common in the plains ; Dominica !, Imr. ; S. Vin- 

 cent !, Guild.; [Cuba, Panama !, Venezuela]. 



2. ICICA, Audi. 



Calyx 4-5-toothed. Petals 4-5, valvate. Stamens 8-10, perigyuous ; anthers oblong. 

 Ovary 4-5-celled : style 4-5-lobed at the top. Pericarp leathery, tardily dehiscent, 5-1- 



pyrenous. Resinous, glabrous trees ; leaves impari-pinnate or ternate: leaflets quite entire, 



usually leathery, petiolulate; racemes or corymbs axillary. 



2 I. heptaphylla, Aubl. Leaflets 5-7, elliptical-lanceolate, acuminate; flowers 

 corymbose • corymbs short, 2-4 times exceeded by the aphyllous portion of the petiole : 

 pedicels twice as long as the flowers, usually ternate; petals 4, revolute on the top, 

 pubescent on the margin; drupe . . . .—Aubl. t. 130— Amyris ambrosiaca, Mey.l Esseq. 



