288 THE PLANT LIFE OF MARYLAND 



While the herbaceous vegetation is not rich in species it is ex- 

 tremely so in individuals. Oxalis acetosclla and Mitchella repens 

 may form a continuous carpet for many square yards. Dalibarda 

 repens, Unifolium canadense and Circaea alpina are also gregarious 

 and extremely abundant. Other characteristic species are Dryop- 

 teris spinulosa var. intermedia, Phegopteris phegopteris, Aster divan- 

 cat us, Heuchera pubescens, Rubus hispidus, Waldstcina fragarioides, 

 Trillium erectum, Actaea alba, and Lycopodium lucidulum. Infre- 

 quent in the Eiocky Slope forests, but not known outside them in 

 the state are Habenaria bracteata, Ilabenaria orbiculata and Ilepai- 

 ica acuta. The fallen logs and open places in the forest floor are 

 closely covered with the mosses Thuidium, Mnium and Bryum, 

 with the hepatics Bazzania and Scapania or the lichen Peltigera. 



Glades. 



The Glade type of forest was a nearly pure stand of White Pine, 

 with a small admixture of Black Spruce, Yellow Birch, Wild Black 

 Cherry and Mountain Ash. The dense shade of the floor made the 

 shrubby vegetation scant, while the herbaceous plants appear to have 

 been much the same as those already mentioned as being character- 

 istic of the forests of Rocky Slopes. In the small areas of Glade 

 examined the following herbs were noted: 



Oxalis acetosella 

 Mitchella repens 

 Panicularia nervata 

 Osmunda claytoniana 

 Rubus hispidus 

 Vagnera racemosa 

 Unifolium canadense 

 Viola cucullata 

 Carex hystricina 

 Dalibarda repens 

 Caltha palustris 

 Dryopteris spinulosa. 



