26 Bulletin of the University of Texas 



(d) Leaflets 5-11, entire or 



toothed, fruit a samara.. ..Oleaceae ........ 150 



2. Leaves twice pinnate. 



a. Leaves with an odd leaflet. 



(1) Fruit clusters of yellow drupes, 



plant not thorny ............... Melia .......... 128 



(2) Fruit a pod, tree thorny, leaves 



very large .................... Aralia ......... 147 



b. Leaves without an odd leaflet. 



(1) Pinnae 2. 



(a) Leaflets, 2-4 pairs, small. ..Cercidium ...... 120 



(b) Leaflets numerous, min- 



ute, leaves in fasicles ..... Parkinsonia ....119 



(2) Pinnae 2-4, leaflets numerous. ..Prosopis ....... 114 



(3) Pinnae 4 or more .............. Mimosaceae . . . .114 



3. Leaves both once and twice pinnate on 



the same tree ......................... Gleditsia ....... 120 



II. Leaves simple. 



A. Leaves opposite or whorled. 



1. Petiole of leaf long, more than 1 % inches. 



a. Blades palmately 3-5 lobed ............ Aceraceae ...... 134 



b. Blades entire or with 1 or 2 lateral 

 lobes. 



(1) Fruit an elongated capsule ........ Catalpa in 



Rhinanthaceae . .155 



(2) Fruit an ovoid capsule ............ Paulo wnia in 



Rhinanthaceae .155 



2. Petiole of leaf short, less than 1 1 /2 inches. 



a. Blades entire. 



( 1 ) Trees wjth thorns ................ Karwinskia in 



Frangulaceae ...139 

 (2) Trees without thorns. 



(a) Fruit fleshy. 



x. Veins of leaves prominent- 



ly curved, fruit a red drupe. Cynoxolum 



y. Veins not prominently 



curved, fruit a black drupe. .Chionanthus 



(b) Fruit dry. 



x. Fruit an elongated persist- 



ent pod, leaves linear some- 



times alternate ............. Chilopis ........ 156 



y. Fruit a globose structure of 



nut-like bodies ............. Cephalanthus . . 157 



b. Blades undulate or serrate. 



(1) Blades finely serrate, the nerves 

 pubescent beneath with deep red 

 tomentum . . . ..Viburnum ...... 158 



