134 Bulletin of the University of Texas 



tree with smooth, brown bark, and purple twigs. Leaves 

 palmately compound, leaflets 5-7, firm, pointed at the apex, 

 finely serrate, lustrous and smooth above, almost smooth be- 

 neath. Flowers in terminal panicles, red, with stamens as 

 long or longer than the petals. Fruit a smooth oblong, obovate 

 capsule with dark brown seeds. 



3. Aesculus octandra Marshall. Sweet Buckeye. A large 

 forest tree 100 high or in our area sometimes a shrub with 

 brown, scaly bark. Leaves palmately compound with 5-7 

 oval to obovate or elliptic leaflets, which are short-stalked 

 or sessile, long pc:nted at the apex, finely serrate, smooth 

 above, hairy along the veins beneath. Flowers yellowish or 

 purplish in terminal panicles. Fruit a smooth obovoid pod. 



In woods and along streams, Pennsylvania, Iowa, Georgia, 

 Louisiana and Texas. In western Texas it becomes a shrub. 

 The tree has been extensively planted for ornament. The 

 wood is very light. 



ACERACEAE Tourn. Maple Family. 



Trees with opposite, simple or pinnately compound leaves 

 which are usually 3-5 lobed, small flowers in axillary or termi- 

 nal clusters. Fruit a two winged double samara. 



Leaves simple, palmately lobed twigs, reddisii 



brown Acer. 



Leaves pinnate or trifoliate, twigs green or 



purplish Rulac. 



ACER (Tourn.) L. The Maples. 



1. Leaves with large teeth or lobes, the margin 



entire. 



a. Leaves large, eastern species. 



(1) Bark on trunk gray or nearly black. . 1. A. saccharum. 



(2) Bark on trunk white 2. A. Floridanum. 



b. Leaves small, western trees 3. A. grandidentatum. 



2. Leaves with 3-5 primary lobes, the margins 



of the lobes serrate or toothed. 



a. Leaves distinctly 5 lobed, the terminal 



lobe long and broadest at apex 4. A. saccharinum. 



b. Leaves with 3-5 shallow lobes, the 



terminal lobe broadest at the base. 



(1) Leaves almost or quite smooth below 5. A. rubrum. 



(2) Leaves persistently wooly below.... 6. A. Drummondi. 



