PART 3, 1911] RUTACEAE 187 



16. Zanthoxylum phyllopterum (Griseb.) Wright; Sauv. Anal. 

 Acad. Ci. Habana 5 : 287. 1868. 

 Fagara phylloptera Griseb. Cat. PL Cub. 48. 1866. 



A shrub with grayish somewhat flexuose branches, when young densely and minutely 

 puberulent especially toward the ends, glabrous when old, armed with straight or curved 

 brownish stipular prickles 3-7 mm. long ; petioles 1.5-3 cm. long, winged and thus form- 

 ing broad leaf-like, obovate or elliptic-obovate phyllodes 0.7-2 cm. broad, reticulate-veined 

 on both sides, shining above, beneath paler and sometimes bearing a prickle on the promi- 

 nent midrib, the margin revolute, glandular, sparingly crenate ; leaflets 1 or 3, or wanting, 

 sometimes obsolete and represented by a short prickle, obovate or elliptic-obovate, O.S-2.5 

 cm. long, 0.4-1.2 cm. broad, entire, cuneate, rounded or emarginateat the apex, not callus- 

 bearing at the base, sometimes bearing a solitary prickle on the back near the middle ; flowers 

 solitary or few and glomerate in the axils of the leaves ; staminate flowers : sepals 4, decus- 

 sate-imbricate, short-triangular to triangular-oval, obtuse, coriaceous, thinner at the 

 margin ; "petals 4, imbricate in bud, elliptic to oval, 2.5-3 mm. long, 1.5-2 mm. broad, 

 rounded or occasionally acute at the apex, coriaceous; stamens 4; filaments longer than the 

 petals ; anthers short-ovate, obtuse ; gynophore somewhat thickened, short-conic, crowned 

 by the two callus-like rudiments of the ovary ; pistillate flowers unknown ; follicles sub- 

 globose, 3^1 mm. in diameter, blackish-brown, wrinkled, short-stipitateor subsessile ; seeds 

 subglobose, about 3 mm. in diameter, black, shining. 



Type locality : Eastern Cuba. 

 Distribution : Cuba. 



17. Zanthoxylum dumosum A. Rich. Ess. Fl. Cuba 327. 1842. 



Fagara dumosa Griseb. Mem. Am. Acad. II. 8: 170. 1860. 

 Fagara dumosa stenophylla Griseb. Cat. PI. Cub. 48. 1866. 

 ? Fagara dumosa plalyphylla Krug & Urban ; Urban, Bot. Jahrb. 21 : 581. 1896. 



A glabrous diffuse much branched shrub, 1-2 m. high, with a grayish bark armed 

 with straight or recurved brown or grayish stipular prickles 1.5-8 mm. long ; branches 

 short, rigid, more or less zigzag, when young puberulent, glabrous when old ; leaves equally 

 pinnate, rarely odd-pinnate ; petioles winged and thus forming leaflet-like phyllodes 1-6 

 mm. broad, unarmed or prickly, the prickles when present in pairs above at the apex, or 

 unpaired beneath at or below the apex, the margin recurved, entire or obsoletely crenate, 

 equilateral or nearly so, and bearing a few pellucid glands; leaflets 2, rarely 3, oblong- 

 linear to obovate, 0.3-2 cm. long, 0.1-1 cm. broad, rounded or emarginate at the apex, 

 sessile, rigid, entire or occasionally obsoletely crenate, equilateral or nearly so, not callus- 

 bearing at the base, coriaceous, the pellucid gland apical, rarely 1 to several along the 

 margin, above shining, reticulate-veined, beneath paler and obsoletely veined ; flowers 

 sessile, solitary^ or few, glomerate in the axils of the leaves ; staminate flowers unknown ; 

 pistillate flowers : sepals 4, imbricate, free, orbicular or triangular-orbicular, chartaceous- 

 coriaceous, 0.6-0.8 mm. broad, the margin more or less minutely ciliate ; petals 4, oval or 

 ovate, rounded at the apex, much narrower at the base or stipitiform-contracted, 1.5-2 mm. 

 long, 1-1.2 mm. broad, coriaceous, ciliate; gynophore entire, short; gynoecium 2-carpel- 

 lary ; ovaries sessile on the gynophore ; styles deciduous ; follicles 1 or 2, sessile, obovoid or 

 nearly globose, 3-4 mm. long; seeds nearly globose, 2.5-3 mm. broad, black, shining. 



Type locality : Vuelta de Abajo, Cuba. 

 Distribution : Cuba. 



18. Zanthoxylum spinifex (Jacq.) DC. Prodr. 1: 728. 1824. 



Fagara spinifex Jacq. Fragm. 10. 1809. 



Fagara murophylla Desf. (Tabl. Bot. 200; hyponym. 1804) ; Hamilt. Prodr. 21. 1825. 



Zanthoxylum microphyllum Desf. Cat. Hort. Paris, ed. 3. 256. 1829. 



A shrub or small tree, 1-5 m. high, with a grayish or grayish-brown bark and often 

 flexuose branches, almost always armed with slender, brownish, stipular prickles 2-5 mm. 

 long ; twigs when young minutely puberulent, glabrate when old ; leaves odd-pinnate ; 

 leaflets 3-11, opposite, very variable in shape, linear-oblong to elliptic or ovate, occasionally 



