116 THE PLANT LIFE OF MARYLAND 



Strophostyles umbellata 

 Senecio tomentosus 

 Gnaphalium purpureum 

 Eupatorium hyssopifolium 

 Ohrysopsis mariana 

 Gymnopogon ambiguus 

 Polygala nuttallii 

 Rynchosia erecta 

 Lobelia nuttallii 

 Cyperus retrofractus 

 Polypremum procumbciis 

 Uniola laxa 

 Sericocarpus asieroides. 



Sandy Loam Upland Swamps. — The Sandy Loam Upland 

 Swamps are almost entirely confined to Worcester and Wicomico 

 counties, the only portion of the Talbot formation in which 

 there are large continnous areas • of light soils. Typical examples 

 may be found in northern Worcester County in a swamp three 

 miles east of Berlin on the divide between Turville and Ayer 

 creeks, and another two miles northwest of St. Martin, on the 

 divide between the St. Martin and Pocomoke rivers. A second 

 type of the Sandy Loam Upland Swamp is found just back 

 of the broad marshes, and may be seen near Boxiron, Greenback- 

 ville and elsewhere along Chincoteague Bay in Worcester County. 

 The first of these swamp types is dominated by deciduous trees, 

 the latter by pines ; although the proportion of the dominant species 

 is different, the floras of the two types are not very unlike. Where 

 the Loblolly is the chief tree this habitat resembles in physiognomy, 

 and to a slight extent in flora, the moist Pine Barrens of North 

 Carolina, South Carolina and Georgia. The Scrub Pine is invari- 

 ably absent. The deciduous species make up from 50% to 80% of 

 the stand in the first type and from 10% to 40% in the second type, 

 being made up characteristically of Willow Oak, White Oak, Sweet 

 Gum, Red Maple, Water Oak, Cow Oak, Black Gum, Magnolia, 

 Holly and Dogwood and less frequently of Fringe Tree and the 

 River Birch. 



