170 Rhodora [July 



diverse habitats of coastal plain plants in that region: Schizaca 

 puritta growing either in the wettest of sphagnons quagmires, in the 

 dryish Cladonia heath or even in rock-crevices; Woodwardia vir- 

 (jinira, of quaking bogs southward, or W. arrolnta, of our wet or 

 mossy woods, taking to cobble beaches; the Bog Cranberry reaching 

 phenomenal development among quartzite boulders; the Inkberry 

 indifferent whether it grows in the deep shade of spruce woods, on 

 open sphagnons bogs or in dry blueberry pastures; Piuiiciim Lind- 

 heimeri, of dry open sands southward, represented in Nova Scotia 

 by a plant of inundated quagmires; and SoUdago tenuifolia, of coastal 

 plain sand-plains, with a Nova Scotian representative found only in 

 the lake-margins. Is not this very general interchange of habitats 

 due, to a great extent, to the unusually moist atmosphere and greatly 

 retarded evaporation? Where there is abundant moisture every- 

 where the plants secure what they need, even in comparatively dry 

 habitats. 



Another point, and the last: in the areas w T e explored, this remark- 

 able flora derived from the southern coastal plain was restricted to or 

 at least obvious only in the region of acid rock, the "gold-bearing 

 series" and their adjacent granites, the cool Atlantic slope of Nova 

 Scotia or (as on Digby Neck) in extensive areas of acid savannah. 

 Wherever we tapped the regions with limestone, gypsum or basalt, 

 regions with but. slightly acid or sweet or basic soils, the coastal 

 plain types were found only on sphagnons bogs or on long-weathered 

 ami leached crests or open plains. Instead, as at George River, Port 

 Bevis, Baddeck, Truro, Folleigh, 5-Mile River and the southern 

 slope of the North Mountain, the plants which gave distinction to 

 the regions were such Canadian or Alleghenian calcicoles or denizens 

 of rich woods as Thelypteris F.ilix-mas, Cystopteris btdbifera (fig. (i), 

 Pteretis nodulosa, Equiselum scirpoides, Milium effusum, Sphenopholis 

 pattens, Festuea nutans, AspereUa hysirix, Carez rosea, C. aurea, V. 

 eburnca, Juhchx Dudla/i, Listera canvattarioides, Ostrya virginiana, 

 Laportca canadensis, Ranunculus PursKii, li. reeunatus, Dentaria 

 dipkylla, Amelanchier canadensis (fig. 8), Fragaria vesea, var. atneri- 

 cana, Qeum virginianum, Geranium Robertianum, Skepherdia canadensis, 

 Circaea latifolia and ('. canadensis, Araliaraeemosa, Sanicula gregaria, 

 Osmorrkiza Claytorti and 0. divaricaia, Satureja vulgaris, Solidago 

 latifolia, S. serotina and Erigeron hyssopifolius (fig. 7). 



