

Tin Trcis of Texas 



Fig. 39. Ptelea trifoliata. 



SIMARUBACEAE De Condolle. 



Ailanthus Desfontainos. 



1. Ailanthus glandulosa Desf. Tree of Heaven. A large 

 rapidly growing tree with thin pale bark, marked with large 

 lenticcls. Leaves large, unequally pinnate, ill-scented, leaf- 

 lets 13-41, short stalked, pointed, notched at base with green 

 Lrlamls on the under side of the teeth. Flowers greenish 

 white in large panicels. . Fruit a linear, curved samara with 

 the seed in the middle. A Chinese tree naturalized and fre- 

 quently planted for ornament. It sprouts freely from the 

 roots and becomes a pest in some localities. 



