MARYLAND WEATHER SERVICE I 2 7 



Quercus prinus L. Chestnut Oak. 



Absent from the southern counties of the Eastern Shore; rare in 

 Caroline and Talbot counties, frequent in Upper Queen Anne's, Kent 

 and Cecil, preferring gravel soil; common throughout the Midland 

 and Mountain Zones, preferring gravel soil and rocky slopes and 

 ridges. 



Quercus acuminata (Michx.) Sarg. Yellow Oak. 



Upper Midland District; in upland soils; rare. 

 Montgomery County, Barnesville (Frederick H. Blodgett). 



Quercus prinoides Willd. Scrub Chestnut Oak. 



Western Shore District of the Coastal Zone, Lower Midland District in 



sand or the thin soil of rocky slopes; infrequent. 

 Anne Arundel County, Glenburnie (M. A. Chrysler). 



ULMACEAE. 



Ulmus americana L. American Elm. 



Throughout the state; being rare in the southern Eastern Shore, 



frequent in other portions of the Coastal Zone, preferring flood plains; 



frequent throughout the Midland Zone in flood plains and along 



streams, absent from the Mountain Zone. 



Ulmus fulva Michx. Slippery Elm. 



Distributed as is the preceding, the two often growing together. This 

 species is somewhat the commoner of the two in the Upper Midland 

 District, often growing in relatively dry soil. 



Celtis occidentalis L. Hackberry. 



Rare in the southern Eastern Shore, frequent in the remainder of the 

 Coastal Zone and in the Midland, growing in moist and dry soil along 

 streams, on the Upland and in the crevices of rocks. 



Celtis crassifolia Lam. Hackberry. 



Throughout the Midland Zone, being commoner than the preceding in 



the Upper Midland District, but similar in its tolerance of diverse 

 conditions. 



MORACEAE. 

 Morus rubra L. Red Mulberry. 



Rare in the Southern Eastern Shore, infrequent throughout the remainder 

 of the state, being most abundant in flood plains and rich upland 

 forests. 



Toxylon pomiferum Raf. Osage Orange. 



Coastal and Midland Zones, a frequent escape from cultivation. 

 Apparently not hardy in the Mountain Zone. 



Broussonetia papyrifera (L.) Vent. Paper Mulberry. 



Throughout the state, in cultivated grounds, introduced from Europe. 



