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 te 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 Te2ular -: 3.2. i2:d.ase<ceee oe 1. Sapindus. 
Fruit a leathery 3-lobed capsu’e; flowers irregular. 2. Ungnadia. 
.SAPINDUS IL. 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 
