362 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Plants of Dry Woods 



Viola palmata 



Panicum dichotomum 



Panicum latifolium 



Cypripedium. acaule in subsoil 



Pogonia verticillata in oak-leaf mould 



Gerardia quercifolia 



Lysimachia quadrifolia under pines 



Reaction 



3 + alk. 

 3 + acid 

 neutral 

 neutral 

 3 + acid 

 10 + acid 

 3 acid 

 7 acid 



Plants of Open Fields 



Thymus Serpyllum 



II II 



Pycnanthemum flexuosum 



3 + alk. 

 neutral 

 3 + acid 

 3 + alk. 



Plants of Ill-drained Woods 



Solidago macrophylla (alt. 2700 ft.) 



Trillium erectum. (alt. 2500 ft.) 

 Epigaea repens 



Potentilla tridentata (alt. 2300 ft.) 



100 + acid 



100 + acid 



3 + acid 



3 + acid 



Plants of Sandy Fields 



Lechea intermedia 



Carex festucacea, var. minor 



3 + acid 

 neutral 



