MARYLAND WEATHER SERVICE 425 



the Lower Midland District, where it is one of the characteristic 

 Upland forest trees, less common in the Upper Midland District and 

 Mountain Zone, where it prefers mountain ridges and thin rocky soil. 



Castanea pumila (L.) Mill. Chinquapin. 



Locally common throughout the state, as in northern Dorchester County, 



near East New Market, in Anne Arundel County near Glenburnie, in 



Charles County, near Bel Alton, and on the summits of Catoctin and 



Blue Ridge; prefers open situations in sand or thin rocky soil. 



Quercus rubra L. Red Oak. 



Rare in the Coastal Zone, frequent in the Lower Midland District but 



most abundant in the Upper Midland District and the Mountain Zone, 



where it prefers the lower slopes of mountain ridges or occurs less 



abundantly in dry forests. 



Quercus palustris Du Roi. Swamp Oak. 



Throughout the state, absent from the river and stream swamps of the 



Eastern Shore, common in the upland swamps and flood plains; 



common in flood plains and along streams throughout the Midland 



and Mountain Zones. 



Quercus coccinea Wang. Scarlet Oak. 



Throughout the state, being frequent in the Coastal Zone, and common 

 in the Midland and Mountain Zones, where it is one of the character- 

 istic forest trees; most abundant in the dry forests of slopes and 

 ridges. 



Quercus velutina Lam. Black Oak. 



Throughout the state; being one of the three commonest oaks in the 



Coastal Zone and one of the two commonest in the remainder of the 



state; an important constituent of all upland forests and frequent in 



flood plains. 



Quercus digitata (Marsh.) Sudw. Spanish Oak. 



Throughout the Coastal Zone, extending beyond the "Pall-line" up the 



Potomac River as far as Seneca Creek, and infrequently elsewhere; 



is one of the two commonest oaks in the southern Eastern Shore, 



where it prefers dry upland soils. 



Quercus nana (Marsh.) Sarg. Scrub Oak, Bear Oak. 



Apparently absent from the Eastern Shore District of the Coastal Zone, 

 infrequent in the Western Shore District, being common in the Upper 

 Midland District and the Mountain Zone, where it prefers open situa- 

 tions with thin rocky soil, as the summits of the Catoctin mountains 

 and the cut-over forests of Garrett County. 



Quercus marylandica Muench. Black Jack Oak. 



Throughout the Coastal and Midland Zones, apparently being absent 



from the Mountain Zone. Its relative abundance is greatest on the 



