142 ARBORETUM ET FRUTICETUM BRITANNICUM. 



GENUS I. 



XANTHO'XYLUM L., and H. B. et Kth. THE XANTHOXYLUM, or 

 TOOTHACHE TREE. Lin. Syst. Dioe'cia Tri-Pentandria. 



Identification. Lin. Gen., No. 150. and 1109. ; Dec. Prod., 1. p. 725. ; Don's Mill., 1. p. 801. 



Synonymes. Zanthoxylum (it is thus spelled in many botanical works) ; Kampm&nma Rafin. ; 

 Clavalier, Fr. ; Zahnwehholz, Ger.; Santossilo, Ital. 



Derivation. From xanthos, yellow, and xulon, wood ; from the yellowness of the wood, more espe- 

 cially of the roots. The French name means club tree, and the German name, the toothache tree. 



Gen. Char. Calyx short, 3 4-parted. Petals equal in number to the lobes 

 of the calyx, but longer, very rarely wanting. Male flowers. Stamens equal 

 in number with the petals. Female flowers. Stamens sometimes wanting, 

 or very short. Ovaries 5 1, sometimes equal in number to the petals. 

 Capsules 1 5, 1 2-seeded. Seeds globose, dark, shining. (Don's Mill.) 

 Leaves compound, alternate, stipulate, deciduous; pinnately 3 13-folio- 

 late. Flowers axillary, small, greenish or whitish. Inflorescence various. 

 Deciduous low trees or shrubs, natives of North America, with prickles on 

 the branches, petioles, and midrib of the leaflets. The species in British 

 gardens are of easy culture in any common soil, and are easily propagated 

 by seeds, layers, or cuttings of the roots. 



* 1. X. FRAXI'NEUM Willd. The Ash-leaved Xanthoxylum, or common 

 Toothache Tree. 



191. Xantluixyluir. /raxineur 



