398 NATURAL HISTORY OF PLANTS. 



Instead of being provided with a corolla, as in the species of 

 which it has been proposed to make the subgenus Fagara? the 

 Zanthoxylons may have, as we have seen, apetalous flowers ; they 

 belong in this case to the subgenus Euzanthoacylum* In both the 

 number of the pieces in the verticil of the perianth and androceum 

 varies from two to six, and that of the carpels from five or six to 

 only one ; sometimes, again, the perianth becomes rudimentary, or 

 is totally wanting. In an American species, as yet imperfectly 

 known, which has received the significant name of Z. syncarpum ; ! 

 the carpels, instead of being independent, are united into a pluri- 

 locular ovary ; but we are unable at present to make this species 

 anything but a subgenus, although it has been proposed to dis- 

 tinguish it generically under the name of Perijcee* Thus comprised, 

 the genus Zanthoxylon comprehends about eight species, 5 arborescent 

 or frutescent, glabrous or pubescent, unarmed or thorny, 6 natives of 

 all hot regions. The leaves are alternate, usually compound impa- 

 ripinnate, more rarely reduced to three folioles or one ; these are 

 generally opposite, articulate, and always besprinkled with glandular 

 punctures. The flowers 7 are disposed in the axil of the leaves at the 

 summit of the branches, in spikes or racemes of cymes more or less 

 ramified, with pedicels generally articulated. 



Beside Zanthoxylon are placed several very nearly allied genera : 

 Evodia, only absolutely distinguished from it by its opposite 



1 L., Gen., n. 1109.— Lamk., Diet., ii. 626; 4 Tul., loc. cit., 280.— Tr. & Pl., loc. cit., 



III., t. 84. — Ttjrp., in Diet. Sc. Nat., Atl., t. 309. 



127.— Te. & Pl., mAnn. Sc. Nat, ser. 5, xiv. 3 A. S. H., Fl. Bras. Mer., i. 74, t. 15; PL 



310. — Pterota P. Be., Jam., 146, t. 5. — Us. Bras., n. 37 ; PI. Rem. Bres., i. 150. — 



Tobinia Desvx., in Ham. Prodr. Fl. Lid. Occ., Toee. & Ge., Fl. N.-Amer., i. 214. — Tul., in 



56. — Geiseb., Fl. Brit. W.-Ind., 136. — Ann. Sc. Nat., ser. 3, vii. 272.— Griseb., Fl. 



Rhetsa Wight & Arn., Prodr., i. 147.— Brit. W.-Ind., i. 136-138.— Tr. & Pl., loc. 



Typalia Dennst., Sort. Malab., v. 34. — cit., 311. — Harv. & Sond., Fl, Cap., i. 445.— 



Lacaris Ham. (ex Wall. Cat., n. 7119). — Mac- A.Gray, Unit.-St. Fxpl. Fxp., Bot., i. 354; 



queria Commers. (ex J., Gen., 374. — A. Juss., Man., ed. 5, 75.— CinrM., Fl. S. Unit.-St., 



loc. cit., t. 38 c). — Kampmannia Rafjn., in ^>6. — C. Gay, Fl. Chil., i. 482. — Oliy., Fl, 



N.-York Med. Repos., ii. hex. v. 350. — Prop. Afr., i. 304. — Miq., Fl. Ind.-Bat,, i. 



Ochroxylum Schreb., Gen., 826. — Curtisia p. ii. 670; Suppl., t. 532. — Benth., Fl. Anstr., 



Scheeb , op. cit,, 199 (nee Ait,). — Pentanome i. 362. — Walp., Rep., i. 519; ii. 825; v. 



Moc & Sess., Fl. Mex. hied, (ex DC, Prodr., 396; Ann., i. 157; ii. 208; iv. 414; vii. 527. 

 n. 2). — Langsdorfia Leanle., in Act, Monac. 6 Sometimes they bear prickles, straight or 



(1819), 229. — Pohlana Nees & Mart., in Nov. curved, scattered over the stems, petals, stalks, 



Act. Nat. Ct'r., xi. 185. — Blackbumia Forst.. and the nerves of the leaves; sometimes they 



Char. Gen., t. 6. — DC, Prodr., i. 83. — A. Juss., are thorns like pads, seeming to take the 



in Mem. Mas., xii. 510. — Endl., Gen., n. place of stipules. 



5973. — Blackbournea K., in Ann. Sc. Nat., " Small white or greenish, glandular, odori- 



ser. 1, ii. 356. ferous, sometimes without perianth. They 



■ Endl., Gen,, n. 5972 a. — Tr. & Pl., loc. often open in spring, before the development 



cit., 310. of the leaves. 



3 Tul., in Ann. Sc. Nat., ser. 3, vii. 279. 



