Zanthoxylum KUTACEyE ,171 



§ 2. Petiole and rhachis more or less winged. Leaflets 

 opposite ; pellucid dots few, mostly marginal, or 

 wanting. Inflorescence mostly lateral, spike- ■ 

 like, lloral parts in 4's. Carpels 2 or 1. Cocci 

 1 or 2. 

 Leaflets mostly narrowly elliptical, 2-5-5 cm. 1. 4. Z. insulare. 

 Leaflets mostly obovate-roundish, 1-2 5 cm. 1. 5. Z. Fagara. 

 Leaflets obovate-oblong or linear-oblong, en- 

 tire, -4-1 cm. 1., 2-glandular at base 6. Z. spinifex. 



§ 3. Petiole and rhachis grooved, not winged. Leaf- 

 lets opposite ; pellucid dots numerous. Inflor- 

 escence paniculate, terminal and lateral. Floral 

 parts in 4's. Coccus 1 7. Z. rJiodoxylon. 



§ 4. Petiole and rhachis grooved, not winged. Leaf- 

 lets opposite ; pellucid dots few, mostly marginal, 

 or wanting. Inflorescence mostly paniculate, 

 terminal and in upper axils, corymbose. Floral 

 parts in 3's. Cocci 1-3. 



Inflorescence clustered, axillary, shorter than 



petiole. Ovary of 2 carpels 8. Z. trifoliatum. 



Inflorescence terminal and in upper axils, 

 corymbose. 



Ovary of 3 carpels. 



Leaves with an odd leaflet. 



Apex of leaflets rounded, entire ... 9. Z. Hartii. 

 Apex of leaflets shortly acuminate, 



emarginate 10. Z.jamaicense. 



Leaves without, sometimes with, an 

 odd leaflet. 



Apex of leaflets obtuse or rounded, 

 emarginate, or broadly and 

 obtusely acuminate. 



Leaflets 1-5-6 cm. 1 11. Z. spinosum. 



Leaflets 7-13 cm. 1 12. Z. negrilcnse. 



Ovary of 1 carpel. 



Leaves without an odd leaflet. 



Apex of leaflets usually somewhat 

 narrowly acuminate, more or 

 less emarginate 13. Z. acuminatum. 



§ 1. Prickles, if present, straight or slightly incurved, scattered 

 on the branches. Leaves with petiole and rhachis not 

 winged nor grooved ; leaflets opposite or alternate ; 

 pellucid dots many, all over the leaflet. Inflorescence 

 terminal, paniculate. Floral parts in 5's, or, in Z. flavum, 

 in 5's or 4's. Carpels 5, but 2 (3-1) in Z. flavum. 



1. Z. elephantiasis Mac/. Jam. i. 193 (1837); twigs, leaves, 

 and inflorescence glabrous ; leaflets coarsely crenate, with many 

 scattered and marginal pellucid dots ; floral parts in 5's ; carpels 

 5 ; cocci 5-1, separate, stalked. — P. Wils. in N. Amer. Fl. xxv. 

 193. Z. aromaticum DC. Prodr. i. 727 (1824) (excl. syn. Jacq.) ; 

 Griseh. Fl. Br. W. Ind. 138 (as regards plants from Jamaica and 



