.Part 3, 1911] RUTACEAE 183 



those of the branches becoming grayish ; petioles subterete, the rachis narrowly channeled ; 

 leaves odd-pinnate ; leaflets 5-9, the lateral opposite, subsessile, orbicular or ovoid, the 

 terminal one obovate and short-petioluled, 1.5-2.5 cm. long, 1.3-2 cm. broad, rounded or 

 subtruncate and apiculate or very short-acuminate at the apex, obtuse or rounded at the 

 base, subequilateral, obsoleteh- crenate or nearly entire, rigid, chartaceous-coriaceous, 

 shining on both sides ; glands inconspicuous or obsolete, scattered beneath, those between 

 the crenatures pellucid ; inflorescence lateral, sessile, glomerate, few-flowered ; bracts 

 ovate ; staminate flowers : sepals 3, in aestivation but little imbricate, distinct, short-ovate or 

 ovate-rounded, obtuse, about 1 mm. long, glandular-thickened on the back near the apex; 

 petals 3, cochleate-imbricate, spreading at flowering time, short-oval, 2.5-3 mm. long, 2 mm. 

 broad, 3 times as long as the sepals ; stamens 3; filaments as long as or scarcely longer than 

 the petals; anthers ovate ; gynophore convex, wrinkled, 3-lobed ; carpels 2, rudimentary, 

 very small, almost immersed in the gynophore ; style short, sometimes a little thickened at 

 the apex; pistillate flowers: gynoecium 3-carpellary ; follicles 3, sometimes 2 or 1 

 abortive, ovoid, 7-S mm. long, 5 mm. broad ; seeds ovate, 5 mm. long, 4 mm. broad, black, 

 shining. 



Type locality : In forests of Flag- Hill, St. Thomas. 



Distribution : Known only from the type locality. 



7. Zanthoxylum Pringlei S. Wats. Proc. Am. Acad. 26: 134. 1891. 



Fagara Pringlei Engler, in E. & P. Nat. Pfl. 3* : 117. 1S96. 



A tree sometimes 13 m. high, with a grayish bark armed with small helmet-shaped 

 prickles ; branches of the inflorescence minutely tomentulose, especially toward their ends, 

 angled or grooved ; leaves equally pinnate ; leaflets 4-10, opposite, oblong to oblong-lanceo- 

 late, 3-7 cm. long, 1.4-2.5 cm. broad, acuminate or rounded and sometimes emarginate 

 at the apex, obliquely rounded at the base, rather dark-green and lustrous above, paler 

 beneath, petioluled, chartaceous-coriaceous, glabrous, entire, opaque or with a few large 

 glandular dots near the apex ; rachis channeled ; inflorescence terminal, corymbose, many- 

 flowered ; staminate flowers not seen ; pistillate flowers : calyx 0.6-0.8 mm. broad ; sepals 3, 

 rarely 4, triangular to semiorbicular, the apex denticulate ; petals 3, rarel3' 4, elliptic to 

 oval, 1.5-2 mm. long, 0.9-1.3 mm. broad, obtuse or rounded at the apex ; gynoecium 

 1-carpellary ; ovary sessile, ovoid or subglobose ; style curved; stigma small; follicles 

 globose to globose-ovoid, 4-4.8 mm. long, 3-4.5 mm. broad, dark-brown or blackish- 

 brown, the surface bearing prominent elevated or immersed glands; seeds subglobose to 

 ovoid, 3-4 mm. long, 2.5-3 mm. broad, black, shining. 



Type locality : In Tamasopo Canon, San Luis Potosi. 

 Distrihution : Known only from the type locality. 



8. Zanthoxylum acumiaatum Sw. Fl. Ind. Occ. 1: 575. 1797. 



Fagara acuminata Sw. Prodr. 33. 1788. 



Tobinia acuminata Hamilt. Prodr. 57. 1825. 



Tobinia coriacea Griseb. Fl. Brit. W. Ind. 137. 1859. Not T. coriacea Desv. 1S25. 



Zanthoxylum Fadyenii Krug .x. Urban ; I'rban, Bot. Jahrb. 21 : 593, as synonym. 1896. 



A glabrous shrub or small tree sometimes 5 m. high, the bark grayish-brown, bearing 

 corky wart-like prickles near the base, mostly 0.5-0.7 cm. long, the branches unarmed ; 

 leaves equally pinnate, 1-1.9 dm. long, persistent ; leaflets 4-8, opposite, ovate, elliptic-ovate, 

 or occasionally lanceolate, 3.5-10 cm. long, 1.8-5 cm. broad, acuminate at the apex, rounded 

 or acutish at the base, entire or minutely crenulate, equilateral or often inequilateral, peti- 

 oluled, lustrous above, paler beneath, coriaceous, glabrous, the marginal glands pellucid, 

 often elevated, the petioles and rachis grooved, unarmed; inflorescence terminal, 6-10 cm. 

 long ; staminate flowers : calyx about 1 mm. broad, the sepals 3, triangular-oval or semi- 

 oval, 0.5 mm. long, the apex entire or denticulate ; petals 3, oval, rounded at the apex, 

 about 2 mm. long, 1.8 mm. broad, white; stamens 3, somewhat longer than the petals, the 

 anthers ovate; pistillate flowers: calyx 1 mm. broad, the sepals 3, triangular-oval, tri- 

 angular-orbicular or semi-oval, 0.4-0.5 mm. long, the apex entire or denticulate; petals 3, 

 oval or occasionally broadly-obovate, 2-2.5 mm. long, 1.4-2 mm. broad, white ; gynoecium 



