138 Bulletin of the University of Texas 



flaky bark and smooth green twigs. Leaves pinnate, leaflets 

 3-5 rarely 7, coarsely and sparingly toothed, thin, light green, 

 and smooth above, somewhat hairy along the veins below. 

 Flowers yellowish green in drooping clusters before the leaves, 

 the staminate and pistillate on separate trees. Fruit matur- 

 ing during the summer and persistent on the branches, twigs 

 somewhat incurved. 



In lowlands, Vermont to Florida and west to the Rocky 

 Mountains. 



2. Rulac Texana (Pox.) Small. Box Elder. Similar to 

 Rulac negundo and distinguished from it by the hairy twigs 

 and smaller leaflets which are thick lobed. 



Along streams Saskatchewan, Manitoba, Texas -and Mexico. 



SAPINDACEAE R. Brown. The Soapberry Family. 



Trees with alternate compound, pinnate leaves. Flowers 

 regular or irregular in large clusters. Fruit a capsule or a 

 berry. 



Fruit berry-like, flowers regular 1. Sapindus. 



Fruit a leathery 3-lobed capsu'e; flowers irregular. 2. Ungnadia. 



SAPINDUS L. The Soapberries. 



1. Sapindus Drummondi Hooker and Arnott. "Wild China. 

 A medium sized tree 40-50 high with upright branches and 

 thick, fissured, flaky bark. Leaves unequally pinnate ; leaflets 

 7-19, short stalked, unequal-sided, entire margined, smooth 

 above, slightly hairy below. Flowers regular, whitish in large 

 dense clusters. Fruit yellow, berry-like, persistent until spring. 



Louisiana, Arkansas, Texas, New Mexico, Arizona and 

 northern Mexico. 



UNGNADIA Endlicher. Spanish Buckeye. 



1. Ungnadia speciosa Endlicher. A small tree 25-30 

 high with gray, fissured bark and slender, smooth, brown twigs. 

 Leaves unequally pinnate ; leaflets 5-7, the lateral ones sessile 

 or almost so, the terminal ones stalked, pointed at the apex, 

 finely serrate. Flowers pink, in large clusters, appearing 



