192 NORTH AMERICAN FLORA [VOLUME 25 



verrucose-glandular, brownish, the valves thick ; seeds subglobose, 4-4.2 mm. in diameter, 

 compressed, black, shining, wrinkled. 



Type locality : San Rafael, Zacatepequez, Guatemala. 



Distribution : Southern Guatemala ; also reported from Chiapas, Mexico. 



29. Zanthoxylum elegantissimum (Engler) P. Wilson, Bull. Torrey 

 Club 37 : 85. 1910. 

 Fagara elegantissinia Engler, Bot. Jahrb. 21 : Beibl. 54 : 25. 1896. 



A nearly glabrous loosely-branched shrub, with slender vine-like twigs more or less 

 armed with small, compressed, reflexed prickles 1 mm. long; leaves odd-pinnate, 6-15 cm. 

 long; leaflets 25-61, oblong or oblong-oval, 4-9 mm. long, 3-5 mm. broad, sessile, rounded 

 and minutely serrulate or nearly entire at the apex, truncate or subtruncate at the base ; 

 rachis and petioles grooved above, narrowly winged, more or less armed with small, com- 

 pressed prickles; panicles terminal, many times compound, brownish-pilose, their secondary 

 branches few-flowered ; pedicels short, nearly equaling the flowers ; staminate flowers : 

 sepals 4, ovate, acute ; petals 4, obovate-oblong, 1 mm. long ; stamens 4, short ; follicles 

 usually solitary, sometimes in pairs, globose, 4 mm. in diameter, brownish ; seeds globose, 

 3 mm. in diameter, black, shining. 



Type locality : Chiconquiaco, Vera Cruz. 

 Distribution : State of Vera Cruz. 



30. Zanthoxylum monophyllum (Lam.) P. Wilson, Bull. Torrey 

 Club 37 : 86. 1910. 



Fagara monophvlla Lam. Tab. Encyc. 1 : 334. 1791. 



? ( n, I, Ma Schreberi J. F. Gmel. Syst. Nat. 2 : 498. 1791. 



Ochroi vlum americanum J. St. Hil. Expos. Fam. 2: 259. 1805. 



Zanthoxylum simplicifolium Vahl, Eclog. 3: 45. 1807. 



Ochroxylum punctaium Mart. Denks. Akad. Munch. 6: 151. 1816. 



Salmasia spinosa Spreng. Neue Entdeck. 2 : 166. 1821. 



? Zanthoxylum Pentanome DC. Prodr. 1 : 725. 1824. 



? Pentanome simplicifolia DC. Prodr. 1 : 725, as synonym. 1824. 



Zanthoxylum Ochroxylum DC. Prodr. 1 : 725. 1824. 



A shrub or tree, sometimes 10 m. high, with grayish bark ; branches unarmed or bear- 

 ing flat-pyramidal sharp-tipped or rounded prickles 2-9 mm. long ; leaves unifoliolate, the 

 leaflet oval or elliptic-oval, 3-14 cm. long, 1.5-5.4 cm. broad, or on the sterile branches 

 sometimes 22 cm. long, and 8 or 9 cm. broad, acute, obtuse or short-acuminate, rarely long- 

 acuminate at the apex, acute or sometimes rounded at the base, entire or obscurely crenu- 

 late or rarely coarsely and irregularly crenate, equilateral or occasionally somewhat inequi- 

 lateral, green and lustrous above, paler beneath, glabrous, the pellucid glands numerous ; 

 petioles 0.5-1.5 cm. long, grooved, glandular ; inflorescence paniculate, terminal, or often on 

 lateral branches, 2-5 cm. long, its branches more or less hispidulous ; staminate flowers : 

 calyx 1-1.3 mm. broad; sepals 5, rarely 4, triangular, 0.3-0.5 mm. long; petals 5, rarely 4, 

 ovate or ovate-oblong, 2-2.6 mm. long, O.S-1.5 mm. broad, white ; stamens 5, rarely4, as long 

 as the petals, the filaments ovate ; pistillate flowers : calyx 1-1.2 mm. broad ; sepals tri- 

 angular, 0.4-0.5 mm. long ; petals ovate, ovate-oblong, or elliptic-oblong, 2-2.5 mm. long, 

 obtuse or short-acuminate at the apex ; gynoecium 2- or 3-carpellary ; ovaries subsessile ; 

 styles short; follicles globose or globose-obovoid, 3.5-4.5 mm. long ; seeds globose-reniform, 

 3-4 mm. long, 2.7-3.3 mm. broad, black, shining. 



Type locality : Antilles. 



Distribution : Hispaniola to Trinidad ; Costa Rica ; also in northern South America. 

 Illustration: Pluk. Aim. pi. 239, f. 5 ; Moc & Sesse, Calq. Dess. pi. 1S7 (gynoecium 

 faulty?). 



31. Zanthoxylum Nashii P. Wilson, Torreya 8 : 138. 1908. 

 A prickly shrub or small tree 3-4.5 m. high, with slender grayish branches ; young 

 twigs light-gray, verrucose-glandular ; stipular prickles in pairs, numerous, slender, straight 

 or slightly curved, spreading, chestnut-brown, becoming gray with age; leaves odd-pin- 

 nate, 0.5-1.5 cm. long, the petioles and rachis (if present) narrowdy winged; leaflets 3, 



