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 quercifoUa 
Lysimachia quadrifolia under pines 
Reaction 
3 + alk. 
3 + acid 
neutral 
neutral 
3 + acid 
10 + acid 
3 acid 
7 acid 
Plants of Exposed Rocks 
on schist 
Woodsia ilvensis 
Amelanchier sanguinea " " 
Camptosonis rhizophyllus on limestone 
Selaginella rupestris " " 
Arenaria strict a " " 
Ldparis Loesellii 
7 acid 
3 acid 
10 + alk. 
Plants of Open Fields 
Thymus Serpyllum 
u a 
Pycnanthemuni flexvasum 
3 + alk. 
neutral 
3 + acid 
3 + alk. 
Solidago macrophylla 
Trillium erectum 
Epigaea repens 
Potentilla tridentata 
Plants of Ill-drained Woods 
(alt. 2700 ft.) 
(alt. 2500 ft.) 
(alt. 2300 ft.) 
100 + acid 
100 + acid 
3 + acid 
3 + acid 
Plants of Sandy Fields 
Lechea intermedia 
Carex festucacea, var. minor 
3 + acid 
neutral 
