194 NORTH AMERICAN FLORA [VOLUME 25 



rounded, obtuse, or short-acuminate at the apex, somewhat cordate, rounded or acute at the 

 base, nearly equilateral or inequilateral, depressed-crenate or nearly entire, lustrous ; 

 pellucid glands few to many ; petiole and rachis narrowly grooved above ; inflorescence 

 terminal, 4-20 cm. long ; staminate flowers : sepals 5, semiorbicular or suborbicular, rounded 

 at the apex, the margin thin, nearly entire, or fimbriate, 0.7-1 mm. long, 0.9-1.5 mm. 

 broad ; petals 5, elliptic, obtuse at the apex, 4-5 mm. long, about 2 mm. broad, coriaceous ; 

 stamens 5 ; filaments shorter than the petals, the anthers ovate or ovate-oblong ; pistillate 

 flowers : petals elliptic, elliptic-oval, or somewhat obovate, 2-4 mm. long, 0.8-1.8 mm. broad ; 

 staminodes minute ; gynoecium 5-carpellary ; follicles 4.5-8 mm. long, wrinkled, the body 

 about 4-6 mm. broad, somewhat flattened, the stipe 1-3 mm. long; seeds 4-5 mm. long. 



Type locality : Barbados. 



Distribution : Porto Rico, Guadeloupe, Martinique, and Barbados ; Mexico ; also in northern 

 South America. 



Illustrations : Pluk. Aim. pi. 239, f. 4 (excl. fruit) ; Gaertn. Fruct. pi. 6S. 



35. Zanthoxylum bijugum (Engler) P. Wilson, Bull. Torrey 

 Club 37 : 86. 1910. 



Fagara bijuga Engler, Bot. Jahrb. 21 : Beibl. 54 : 23. 1896. 



A tree with twigs, foliage, and inflorescence shortly and densely pilose ; leaves odd- 

 pinnate, about 1.5-2 dm. long; leaflets 5, coriaceous, the terminal one with a petiolule 4-5 

 mm. long, the ultimate pair remote from the terminal one, 5-6 cm. long, 3-4 cm. broad, 

 oblong, obtuse, the base acute, short-petiolulate, the lowest pair oval, 2.5^1 cm. long, 2-2.5 

 cm. broad, the lateral nerves 7-S, prominent beneath ; panicle terminal, pyramidal, densely 

 flowered, 7-8 cm. long, the lower lateral spikes 3^t cm. long ; pedicels 2 mm. long; pistil- 

 late flowers : calyx about 1 mm. long ; sepals 5, broadly ovate, the margin pale, ciliate ; 

 corolla about 2.5 mm. long ; petals 5, oblong, 2.5 times as long as the calyx; disk with a 

 short gynophore ; gynoecium 5-carpellary; style central, terminated by a disk-shaped 

 stigma. 



Type locality : Near Tlacolula, Oaxaca. 



Distribution : Known only from the type locality. 



36. Zanthoxylum martinicense (Lam.) DC. Prodr. 1 : 726. 1824. 



Fagara martinicense Lam. Tab. Encyc. 1 : 334. 1792. 

 Zanthoxylum juglandifolium Wllld. Sp. PI. 4: 756. 1806. 

 Zanthoxylum album Valil, Eclog. 3 : 47. 1807. 



Zanthoxylum lanceolatum Poir. in Lam. Encyc. Suppl. 2: 293. 1811. 

 Zanthoi vlum juglandifolium f Berterianum DC. Prodr. 1 : 727. 1824. 

 Zanthoxyum Ayua Maza, Anal. Soc. Esp. Hist. Nat. 19 : 228. 1890. 



A tree, often 20 m. high, with grayish bark, bearing stout pyramidal or conic hard- 

 corky prickles, sometimes 5.5 cm. long and 6.5 cm. broad ; branches hispidulous especially 

 at or near their ends, unarmed, or armed with straight or slightly curved brownish prickles ; 

 leaves odd-pinnate or occasionally equally pinnate, 1-3.5 dm. long, longer and with more 

 leaflets on the young shoots; leaflets 5-15, oblong, oblong-lanceolate, obovate, elliptic, or 

 rarely ovate, 3-13 cm. long, 1.5-4.3 cm. wide, obtusely short-acuminate or occasionally acute, 

 rounded or emarginate at the apex, obliquely rounded or acute at the base, inequilateral, 

 glossy and hispidulous especially on the depressed midrib, or with scattered hairs on the 

 upper surface, paler and hispidulous on the midrib and veins beneath, the margins crenulate or 

 entire, occasionally somewhat revolute, the pellucid glands scattered ; petioles and rachis 

 terete or somewhat angled, sometimes slightly grooved, hispidulous, unarmed, or armed with 

 brownish prickles; inflorescence paniculate, terminal and axillary, 0.6-1.5 dm. long; stami- 

 nate flowers: calyx 1-1.4 mm. broad, hispidulous; sepals 5, triangular or triangular-ovate, 

 rounded or acute at the apex ; petals5, ovate or elliptic-ovate, 2-3 mm. long, 1-1.3 mm. broad, 

 white; stamens 5, longer than the petals, the filaments slender, the anthers ovate or rarely 

 orbicular-ovate; pistillate flowers: sepals hispidulous; petals erect; gynoecium obovoid, 

 globose-obovoid, or somewhat pyriform, 5-carpellary, truncate ; style very short ; stigma pel- 

 tate, 1.3-1.5 mm. in diameter, usually distinctly 5-lobed ; follicles close together, sessile, 



