260 THE PLANT LIFE OF MARYLAND 



Upon the summit of Round To}), there is a drier type of habitat 

 and the following plants occur: 



Quercus prinus 

 Pinus virginiana 

 Pinus strobus 

 Robinia pseud-acacia 

 Quercus velutina 

 Pinus pungens 

 Juniperus virginiana 

 Cercis canadensis. 



In the localities where the soil was deeper, the species which 

 were recorded for the river-slope were also found on the sides of 

 the hill adjacent to the latter. The herbaceous growth included the 

 following forms, the first one named being in a large colony or 

 patch covering a quarter acre or more of the summit of the knob, 

 and close to the outcrop of the limestone, spreading downward on 

 the gentler slope of the northern side : 



Dodocatheon meadia 

 Anemone virginiana 

 Arabis canadensis 

 Silene inflata 

 Houstonia purpurea 

 A stragalus carolinianus 

 Camptosorus rli izopli yll us 

 Asclepias quadrifolia 

 Aquilegia canadensis 

 Conopholis americana 

 Campanula americana 

 Cynoglossum officinale 

 Cynoglossum virginicum 

 Draba ramosissima 

 Clematis viorna 

 Cimicifuga racemosa 

 Pellaea atropurpurea 

 Veronica officinalis 

 Cubelium concolor 

 Leptamnium virginianum. 



