456 NATURAL HISTORY OF PLANTS. 
remain long intact. That of Ailantus, especially after being soaked 
in water, is used by wheelwrights, cabinet-makers, and for firing, 
&e.! That of Phellodendron, porous and light, takes the place of 
cork on the banks of the Amour. The wood of several species of 
Simaruba, Zanthoxylon, Ptelea, Esenbeckia, Coriaria, Casimiroa,’ are 
valued in America for industrial and domestic purposes. At the 
Cape, the wood of Calodendron capense is used in the same way. The 
hardest, heaviest, and best for cabinet work jis certainly that of 
various species of Guaiacum, G. officinale, sanctum, hygrometricum, 
arboreum,® &e. Several Rutacee are ornamental: the Aurantiee, cul- 
tivated for their foliage and fruits; the Diosmee and Boroniee, 
valued in our greenhouses for their flowers; some Cuspariee of the 
genera Lrythrochiton, Galipea, Almeidea, Ravenia, ornamenting our 
hothouses; some species of Ruta, Dictamnus, Harmala, and Fabago, 
growing in the open air in France; P/elea, Phellodendron, Cneorum, 
Skimmia, and some species of Zanthovylon,' whose foliage embellishes 
our gardens; finally, the glandular Ai/antus, so useful in industry 
and agriculture. 

1 A. imberbiflora (F. Murtu., Fragm., iii. 3 Upon their characters and uses, as upon 
42; — Bentu., Fl, Austral., i. 392) has a the wood of Passiflora (Fr. Grenadille), see 
wood used in Australia, The branches of Bou-  GUIB., op. cit., iii. 548, 550. 
chardatia are used by the blacks of the country 4 Some, especially Z. nitidwm, piperitum, 
in making lances. flower in our greenhouses, 
2 The fruits of Casimiroa are sold as edible 
in Mexico. 
