FLOWERING PLANTS AND FERNS OF INDIANA. 875 



STYRACACE^. Storax Family. 

 MOHRODENDRON Britton. 



M. Carolinum (L.) Britton. Rattle Box. Snowdrop Tree. 

 (Halesia tetraptera L.) 

 Reported only from near Evansville. A tree 35 to 50 feet high 

 and from 15 to 20 inches in diameter, with light, soft-grained, 

 compact wood of light-brown color. 

 Flowers in April and May. 

 Vanderburgh. 



OLEACE^E. Olive Family. 

 FRAXINUS L. 



F. Americana L. White Ash. 



Generally distributed throughout the State, usually in rich 

 soils. In wet lands it becomes greatly enlarged at the base. A 

 large tree of the highest economic value. In common with many 

 of the hardwood forms of the United States, it reaches its highest 

 development in the lower Wabash basin. According to Ridgway, 

 a height of 140 feet is not uncommon, and clean trunks of from 

 80 to 90 feet are occasionally found. Its uses are too well known 

 to need repetition. 



Flowering season, April and May. 



Distribution so general as to make the mention of specific sta- 

 tions needless. 



F. lanceolata Borck. Green Ash. 



(F. viridis Michx. f.) 



Rather abundant in the southern part of the State, less so 

 farther north. The species finds its highest development in low, 

 rich bottom lands along streams. The form reaches a height of 

 from 50 to GO feet and a diameter of from 18 to 24 inches. The 

 wood is much inferior in quality to that of the white ash, for 

 which it is often substituted. 



Flowering season, April and May. 



The range includes the southern counties, the form extending 

 northward chiefly along the lines of the principal drainage chan- 

 nels. 



F. Pennsylvania Marsh. Red Ash. 



(F. pubescens Lam.) 

 This species is found sparingly in a few counties of the State, 

 growing along the borders of streams in moist alluvial soils. It 



