XVII. xanthoxylaYejE : piVlea. 



143 



Identification. Willd. Sp., 4. p. 757. ; Dec. Prod., 1. p. 726. ; Don's Mill., 1. p. 802. 



Synoni/mes. Zanthtixylum ramiflbrum Mich. Fl. B. A. 2. p. 235. ; Z. Clava Herculis van Lin. Sp. 



1455., Lam. Di^t. 2. p. 38. ; Z. americanum Mill. Diet. No. 2., and Tor. Sf Gray, 1. p. 214. ; 



Z. mUe.lVilld. Euum ; Z. caribae'um Gcert. Fruct., but not of Lam. ; Z. tricarpum Hook, not of 



Michx. ; Clavalicr a Feuilles de Frene, Fr. ; Eschen-blattriges Zahnwehholz, Ger. ; Prickly 



Ash, Amcr. ; Frassino spinoso, Ital. 

 Engravings. Du Ham. Arb., 1. t. 97. ; the plate of this species in Arb. Brit., 1st edit., vol. v. ; and 



oxxrfig. 191. 



Spec. Char., ^-c. Leaves pinnate, of 4 to 5 pairs of leaflets, and an odd one ; the 

 leaflets ovate, obscurely sawetl, equal at the base ; the petiole round, and de- 

 void of prickles ; prickles in the situation of stipules. Flowers in axillary 

 umbels, without petals. {Dec. Prod., i. p. 726, 727.) A low deciduous 

 tree or shrub. Canada to Virginia. Height 10 ft. to 15 ft. Introd. 1740. 

 Flowers yellowish, with red anthers ; April and May. Seeds large, black ; ripe 

 in September. Decaying leaves yellowish green. Naked young wood ash- 

 coloured and greenish. 



Variety. 



S :J X. f. 2 virgmicum, the X. virginicum of Lodd. Cat., of which there is 

 a plantin the garden of the London Horticultural Society, and several 

 in the arboretum of Messrs. Loddiges, appears to us only a variety 

 of X./raxineum; probably the same as X. (/.) tricarpum. 



1 afc 2. X. (f.) trica'rpum Michx. The three-fruited Xanthoxylum, or Tooth- 

 ache Tree. 



Identification. Michx. Fl. Bor. Amer., 2. p. 335. ; Dec. Prod., 1. p. 726. ; Don's Mill., 1. p. 803. 



Z. caroliniinvun Lam., Tor. Ss Gray, 1. p. 214. ; Fagira /raxiniftilla Lam. III. 1. 



1. 1. 334. ; and our fig. 192. 



Spec. Char., cfc. Leaves pinnate ; the leaflets 3 

 to 5 pairs, and an odd one, all on short stalks, 

 oblong oval, acuminate, finely sawed, oblique at 

 the base. Petioles and branches prickly. Pa- 

 nicles terminal. Petals 5. (Dec. Prod.) A low 

 tree or shrub. North Carolina to Florida. 

 Height 1.0ft. to loft. Introd. 1806. Flowers 

 greenish ; June. Seeds large, black ; ripe Oct. 



Leaves and bark very aromatic and pungent. 

 Prickles very sharp. The bark of this and the 

 preceding species is imported from New York, 

 and sold in Covent Garden Market as a cure for 

 the rheumatism. Probably a variety of the pre- 

 ceding species. 



Synonymes. 



t. 334. 

 Engravings. Lam. 111. 



192. Xanthdxi'lum tricarpum. 



Other Species of Xanthoxylum. X. mite Willd., treated as a species by 

 some authors, is made a synonyme of X.yi-axineum by Torrey and Gray, and 

 it probably bears the same relation to that species that Gleditschk inermis 

 does to G. triacanthos. Our opinion is, that there is only one species of the 

 genus in British gardens. 



Genus II. 



r 



Lin. Si/st. Monce'cia 



PTE'LEA L. The Ptelea, or Shrubby Trefoil. 



Tetra-Pentandria. 



Identification. Lin. Gen., No. 152. ; Dec. Prod., 2. p. 82. ; Don's Mill., 1. p. 806. 

 .Syno7iyms. BrilUcia Adans. ; Orme de Samarie, Fr. ; Lederblume, Gcr. 

 Derivation, rrom ptelea, the Greek name of the elm, adopted by Linnaus. 



Gen. Char. Calyx short, 4 5 parted. Petals 45, longer than the caiyx. 

 Male flowers. Stamens 4 5, longer than the petals. Female flowers. 



