Part 3, 1911] RUTACEAE 191 



follicles globose or globose-obovoid, 3.5-4 mm. in diameter ; seeds globose or globose- 

 obovoid, 2.8-3.5 mm. in diameter, black, shining.- 



Type locality : Jamaica. 



Distribution: Florida, Texas, Mexico, Central America, and the West Indies; also in South 

 America. 



Illustrations: Sloane, Hist. Jam. 2: pi. 162, f. 1 ; P. Br. Hist. Jam. pi. 5, /. /.■ Lam. Tab. 

 Encvc. pi. 84 ; Descourt. Fl. Ant. 7 : pi. 455 ; Nutt. N. Am. Sylva 3, pi. S4 ; Sargent, Silva N. Am. 

 pi. 32; Sargent, Man./. f78 ; Britton, N. Am. Trees /. 523. 



26. Zanthoxylum affine H.B.K. Nov. Gen. & Sp. 6 : 3. 1823. 



Fagara affi?iis Schultes ; R. & S. Syst. Veg. Mant. 3 : 224. 1827. 



A shrub or small tree with grayish branches which are commonly leafy chiefly toward 

 the ends ; twigs, petioles, rachis, and inflorescence more or less puberulent, the rachis nar- 

 rowly winged, the wings often incurved, forming a groove above ; leaves odd-pinnate or 

 occasionallv equally-pinnate, 2-6 cm. long; leaflets 7-17, sessile or subsessile, oblong-ellip- 

 tic to oval, ovate, or obovate, occasionally lanceolate, 0.5-1.5 cm. long, 0.3-0.8 cm. broad, 

 acute to obtuse or sometimes rounded and emarginate at the apex, cuneate or somewhat 

 inequilaterally rounded at the base, crenulate with small, usually few teeth above the middle, 

 or entire ; pellucid glands below the crenatures, those scattered on the surface dark-brown 

 or blackish and opaque ; inflorescence short-racemose, few-flowered ; pistillate flowers (un- 

 developed): sepals 4, puberulent, the two exterior ones triangular-orbicular or suborbicular, 

 the two inner smaller; petals 4, oval or ovate-oval, puberulent, gibbous below the apex ; 

 follicles obovoid or globose-obovoid, 4-5.5 mm. in diameter before dehiscing ; seeds nearly 

 globose, 3.5-4.5 mm. in diameter, black, shining. 



Type locality : Lake Cuitzeo, Michoacan. 



Distribution : Central and southern Mexico. 



27. Zanthoxylum Rhodoxylon (Urban) P. Wilson, Bull. Torrey 

 Club 37 : 85. 1910. 



Fagara Rhodoxylon Urban, Sytnb. Ant. 5: 530. 1908. 



A forest tree 10-17 m. high, with a trunk sometimes 6 dm. in diameter, the branches 

 grayish or brownish-gray, unarmed ; leaves equally pinnate, rarely odd-pinnate, glabrous, 

 5.5-14 cm. long, the petioles and rachis wingless ; leaflets 2-6, narrowly to broadly obovate 

 or somewhat lanceolate, 3-7 cm. long, 1-3.9 cm. broad, sessile or petioluled, the blade often 

 decurrent on the petiolule to the base or nearly so, glabrous, rounded and emarginate or 

 abruptly short-acuminate at the apex, cuneate at the base, the margin entire, revolute, 

 shining above, paler beneath, reticulate-veined, coriaceous, pellucid-glandular, the glands 

 numerous, elevated or impressed ; inflorescence 3-5 cm. long, terminal or in the axils of 

 the upper leaves, its branches slender ; staminate flowers : sepals 4, triangular to broadly 

 triangular; petals 4, ovate, 2-2.5 mm. long, 1.1-1.5 mm. broad, glandular, obtuse or some- 

 what acutish at the apex ; pistillate flowers unknown ; follicles subglobose, blackish-brown, 

 the surface somewhat wrinkled and pitted ; seeds ovoid or subglobose, 4.5-5 mm. long, 

 4-4.5 mm. broad, blackish-red, more or less wrinkled. 



Type locality : Tyre, near Troy, Jamaica. 

 Distribution : Jamaica. 



28. Zanthoxylum foliolosum Donn. Smith. Bot. Gaz. 18: 1. 1893. 



Fagara foliolosa Engler, in E. & P. Nat. Pfl. 3* : 118. 1896. 



A glabrous scandent shrub with slender, brownish branches armed with short, sharp, 

 recurved, brownish prickles ; leaves odd-pinnate, 5-12.5 cm. long ; leaflets 15-31, the lateral 

 ones oblong to oblong-ovate or oval, sessile or subsessile, 0.5-1.9 cm. long, 3-10 mm. broad, 

 rounded at the apex, truncate and biglandular at the base, coriaceous, the margin crenulate ; 

 pellucid glands few, rather large, situated at the sinuses ; petioles about 1-1.5 cm. long, the 

 rachis grooved and narrowly winged, usually armed with short recurved prickles ; panicles 

 lateral, axillary, few-flowered; flowers not seen ; sepals 4; follicles one or two, when soli- 

 tary usually accompanied by an abortive carpel, globose or subglobose, 5-7 mm. in diameter, 



