Vegetation of Northern Cape Breton. 



357 



includes the forms which, on 

 pioneers : 



Onoclea sensibilis* 

 Equisetum sylvaticum 

 Glyceria canadensis 

 Glyceria lax a 

 Scirpiis atrocinctus 

 Scirpus riihrotinctus 

 Carex crinita 

 Car ex scabrata* 

 Carex stipata 

 Juncus articiilatus* 

 Juncus brevicaudatus 



the whole, are more prominent as 



Juncus cffusus 

 Iris versicolor* 

 Sagina procumbens* 

 Cardamine pennsylvanica* 

 Drosera rotundifolia 

 Chrysosplenium, americanum* 

 Hypericum canadense 

 Epilobium palustre 

 Lysimachia terrestris 

 Lycopus americanus 

 Mentha arvensis* 



Association-types of open swamps. — The luxuriant growth of 

 the grasses, sedges, and rushes may result in the development 

 of a wet meadow association-type, characterized by the pre- 

 dominance of grass-like growth-forms and the relative absence 

 of woody plants. During the evolution of the wet meadow, the 

 plant cover gradually becomes denser, while the nature of 

 the substratum may become modified through the formation of 

 a layer of mucky peat. Contemporaneously with these changes, 

 many of the pioneer species (notably those starred [*] in the 

 above lists), either disappear or else become restricted in their 

 distribution to the more open, wetter habitats. Others become 

 more abundant, and at the same time still other species not 

 before represented may make their appearance. The following 

 list includes various herbaceous plants, which, in addition to 

 those already mentioned, and together, less frequently, with those 

 to be given in a subsequent list, commonly are more or less 

 abundantly represented in open, well-drained swamps. 



Aspidium Thelypteris 

 Aspidium cristatum 

 Osmunda cinnamomca 

 Osmunda rcgalis 

 Agrostis hyemalis 

 Calamagrostis canadensis 

 Eriophorum virginicum 

 Carex canescens disjuncta 



Habcnaria dilatata 

 Habcnaria psycodes 

 Thalictrum polygamum 

 Fragaria virginiana 

 Geum rivale 

 Sanguisorba canadensis 

 Chelone glabra 

 Galium pcdustre 



