392 THE PLANT LIFE OF MAEYLAND 



soils of the Wicomico formation south of Queen Anne's County. Is 

 rare in central Queen Anne's County, and has not been seen in pure 

 stand north of Cliffs Landing on Chester River in Kent County. In 

 the Western Shore District Pinus taerla is common on the Talbot 

 terrace and is frequent in the sandy section, but is infrequent on clay 

 and gravel. 



Pinus rigida Mill. Pitch Pine. 



Occurs throughout the state, but is very rare in the Eastern Shore 

 south of the Chester River, being known from the vicinity of Salisbury, 

 and reported by Mell (in MS.) for Worcester County. On the sandy 

 soils of the Western Shore District Pinus rigida is one of the principal 

 constituents of the forest (Anne Arundel County, Glenburnie). It is 

 rare in other parts of the Western Shore District. Throughout the 

 Midland and Mountain Zones it is of frequent occurrence, never in 

 pure stands but in small groups or as scattered individuals together 

 with Pinus virginiana or with deciduous species, usually on sandy soil. 



Larix laricina (Du Roi) Koch. Tamarack. 



Mountain Zone, found only in swamp forest at Thayerville and Craues- 



ville. 

 Garrett County, Thayerville (2049). 



Picea mariana (Mill.) B. S. P. Black Spruce, Red Spruce. 



Mountain Zone, found only in swamp and glade forest, in the former of 



which it is the commonest species. 

 Garrett County, Pinzel (963). 



Tsuga canadensis (L.) Carr. Hemlock. 



Known from a single locality in the Coastal Zone (Caroline County, 

 Watts Creek), and occurs throughout the Midland and Mountain 

 Zones. In the Lower Midland District it is rare. In the Upper 

 Midland it is frequent, particularly on rocky slopes along streams. 

 In the Mountain Zone it is very abundant on the lower slopes of hills 

 and Mountains, particularly in rocky soil, and also occurs in glade 

 and swamp forests. 



Taxodium distichum (L.) L. C. Rich. Bald Cypress. 



Confined to the Coastal Zone. Is common in the River Swamps of the 

 Pocomoke River and Dividing and Nassawango creeks, is infrequent 

 on the Wicomico River. It is known in the Western Shore District 

 of the Coastal Zone only from the vicinity of Marshall Hall, Charles 

 County (fide Mr. William Palmer), and from Battle Creek, Calvert 

 County. 

 Wicomico County, Tonytank Creek (11S9). 



Chamaecyparis thyoides (L.) B. S. P. White Cedar. 



Confined to the southern Eastern Shore, where it occurs in swamps far 

 above the influence of brackish water. It is infrequent on the Poco- 

 moke River and its tributaries as far north as Steves Island and 



