394 



MORACEAE 



Celtis 



50 



Map 808 



Madura pomifera (Raf.) Schneid. 



50 



Map 809 



Humulus japonicus Sieb.& Zucc. 



to location of the tree, because, as I now recall, trees of this sort were 

 found in the open. In fact, most of our specimens are taken from low, 

 round-topped trees of the open because specimens could not easily be ob- 

 tained from tall, forest-grown trees. The effects of the environment of the 

 trees must therefore have consideration. This species is usually associated 

 with pecan, sweet gum, pumpkin ash, cane, and soft maple. 

 Va. to Mo. and e. Kans., southw. to the Gulf States and Tex. 



3. Celtis pumila (Muhl.) Pursh. (Celtis pumila var. Deamii Sarg. and 

 Celtis occidentdlis var. pumila Muhl.) Dwarf Hackberry. Map 805. 

 Very local and rare to infrequent where it is found. In Lake County it 

 was rather frequent on the sand dunes about Miller. I found it in Steuben 

 County on the high, gravelly slope east of Hogback Lake. In Lawrence 

 County a few very small trees are found on a limestone slope in Spring 

 Mill State Park, associated with dwarf specimens of Zanthoxylum and 

 Rhamnus lanceolata. In Washington County a few trees were found 

 on a wooded slope near Big Spring. In Jefferson County Miss Edna 

 Banta found a few trees in Cliffy Falls State Park near the southern 

 end of Trail no. 1. It is found in Crawford County along Blue River near 

 Milltown. In Harrison County it occurs on a rocky, wooded slope 3 miles 

 east of Elizabeth. In Perry County I found it on several ridges about 7 

 miles east of Cannelton. 



The leaves of this species are extremely variable, but no more so than 

 its habitat. 



Pa., Ind. to Mo., southw. to Fla., Ga., and Tenn. 



64. MORACEAE Lindl. Mulberry Family 



Plants woody, small trees. 



Branches without spines; leaves serrate; pistillate flowers in spikes 



1913. Morus, p. 395. 



Branches with spines; leaves entire; pistillate flowers in heads 



1918. Maclura, p. 395. 



