284 THE PLANT J.II-'E OF MARYLAND 



pear to be hostile to them. Growing rooted in mosses on top of the 

 boulders or in their crevices is found Capnoides semper virens, 

 which occurs only in just such situations here, and in the Blue Ridge 

 and in Baltimore County, near Warren. Other plants common on 

 or among the boulders are: 



Sambucus pubens 

 Hamamelis virginiana 

 Hydrangea arborescens 



Acer spiral am 

 Ribes cynosbati 

 Rubus odoratus 

 Aster acuminatus 

 Tiarella cordifolia 

 Poly podium vulgare 

 Umbilicaria sp. 



Valleys. 



Loam*. — The vegetation of the loam soils of the central valley of 

 the Garrett County plateau is known to the writer only from an 

 examination of cut-over forests in the vicinity of Oakland, where 

 the White Oak is the predominant tree, forming 75% to 90% of the 

 stand. In the virgin forests of the loam soils there was doubtless a 

 larger percentage of the species which are now subordinate : i. e. the 

 Bed Oak, the Black Oak, the Shagbark Hickory, the Chestnut, the 

 Bignut Hickory, the Scarlet Oak, the Bed Maple, the Sweet Birch 

 and the Hornbeam. 



The shrubby vegetation is predominantly made up of Quercus 

 nana and Vaccinium staminciun. together with Gaylussacia dumosa, 

 Corylus americana, Cornus candidissima, Rhus copallina and Cra- 

 taegus uniflora. In the most open cut-over stands the herbaceous 

 plants are almost identical with those of the Bidges. In the older 

 second growth stands, such as those in the vicinity of Deer Bark 

 may be seen : 



Solidago bicolor 

 Pedicularis canadensis 

 XaJiahis albus 



