MARYLAND WEATHEB SERVICE 117 



The floor of the Upland Swamps of the deciduous type is closed 

 by a dense stand of shrubs from three to eight feet in height, among 

 which the most common are: Myrica cerifcra, Viburnum dentatum, 

 Rhus vcrnix, Pieris mariana, Ilea virginica, Aralia spinosa, Aronia 

 arbutifolia, Euonymus americanus. 



In the coniferous type of Swamp the stand of shrubs is much 

 more open, and at many localities in Worcester County is made up 

 almost entirely of Myrica cerifera, although the species mentioned 

 above also occur in other places. 



The herbaceous vegetation of the deciduous swamps is almost as 

 poor as that of the Clay Upland Swamps, and likewise there is 

 often a carpet of peat moss to be found beneath the dense shade 

 of the shrubs. In the coniferous swamps, however, there is a richer 

 stand of herbaceous plants than in the Upland forests in which the 

 conifers are dominant, and it is here that the resemblance to the 

 southern Pine Barrens is to be noted, to which allusion has been 

 made. Among the most characteristic species are the following: 



Rynchospora glomerata 



Xyris communis 



I, 'In. via mariana 



Drosera intermedia 



Osmunda regalis 



Cyperus diandrus 



Fimbristylis Jaxa 



J uncus dichotomus 



Woodicardia areolata 



Rynchospora cymosa 



Poly gala lutea 



Hypericum mutilum 



Lobelia nuttallii 



Fuirena squarrosa var. hispida 



Rhexia virginica 



Habenaria cristata 



Diodia virginiana 



Bartonia virginica 



Drosera rotundifolia 



