KEY TO THE SPECIES OF HACKBERRIES 



1 . Fruit dark purple, on pedicels somewhat longer than leaf petioles ; 

 leaves 2^2^ inches long, usually sharply serrate with numerous 

 teeth, green on both surfaces, without conspicuous reticulate 



veinlets on lower surface C. occidentalis, Hackberry, p. 223. 



1. Fruit orange to red-brown to yellow; leaves entire or sparingly 

 toothed. 



2. Fruit on pedicels much longer than leaf petioles ; leaves lYzS 

 inches long with conspicuous reticulate veinlets below. 

 3. Leaves broadly ovate, green below; fruit yellow to orange- 

 red C. reticulata, Netleaf Hackberry, p. 225. 



3. Leaves oblong-ovate, pale below; fruit dark red-brown; 

 Texas C. lindheimeri, Lindheimer Hackberry, p. 223. 



2. Fruit on pedicels shorter or but little longer than leaf petioles; 

 leaves without conspicuous reticulate veinlets below. 



4. Leaves mostly oblong-lanceolate, long-acuminate, 2-5 inches 



long ; fruit yellow to orange-red 



C. laevigata, Sugarberry, p. 225. 



4. Leaves ovate-lanceolate, short-acuminate, 11/^-2^2 inches 



long; fruit dark orange-red to red-purple 



C. tenuifolia, Georgia Hackberry, p. 223. 



Planertree. Waterelm 



Planer a aquatica Gmel. 



This is a small, rate monotypic tree growing in swampy sites 

 on the coastal plain and river valleys from North Carolina to 

 Missouri and south. It is characterized by elmlike leaves which 

 are 2-314 inches long and crenate-serrate and a peculiar prickly 

 drupe Yi inch long which is covered with odd plates and processes. 



[22l] 



