Tin Trees of Texas '11 



Page 



(2) Blades slightly serrate above the 



middle, drupes elongated Adelia 153 



(3) Blades serrate, fruit a four-lobed 



capsule with bright red seeds Euonymus 132 



B. Leaves alternate. 



1. Leaves parallel nerved, crowded at the 



end of single or sparingly branched stems. Palms and Yucca 46 



2. Leaves with netted veins. 



a. Leaves with more than one primary 

 vein at base or the lower veins longer 

 and more branching than those above 

 them. 



(1) Blade of leaf entire. 



(a) Primary veins three, base of 



leaf oblique, fruit a drupe Celtis 98 



(b) Primary veins five to seven, 

 base of leaf heart-shaped, 



fruit an eflongated pod Cassiaceae US 



(2) Blade of leaf serrate or notched. 



(a) Leaf broadly heart-shaped. 



x. Oblique at base, sap watery, 



fruit a winged nutlet Tilia 141 



y. Not oblique at base, sap 

 milky, fruit a berry, leaves 

 frequently lobed. 

 (x) Berry edible, leaves 



not hairy Morus 83 



(y) Berry not edible, 



leaves hairy Broussonetia ... 9? 



(b) Leaf not at all heart-shaped, 

 the base decidedly oblique, 



fruit a drupe Celtis 9S 



(c) Leaf blade deltoid, or some- 

 times heart-shaped, buds 

 gummy, petiole usually flat- 

 tened Populus 55- 



(3) Blade of leaf lobed. 



(a) Plant quite thorny, fruit ter- 

 minated by the spreading 



calyx Crataegus 105- 



(b) Plant not thorny. 



k. Leaf star-shaped, lobes 5-9 



serrate Liquidambar . . . 101 



1. Leaf large with 3-5 irregu- 

 lar lobes, petiole of leaf 

 covering the young buds, 

 fruit a globose head of 

 achenes Platanus . ..104 



