150 Rhodora [AvavsT 
Such are Carex sterilis, Arethusa, Pogonia and Drosera longifolia. On 
the whole, however, the peat-bogs are much more distinctly boreal in 
character than any of the other plant societies at this place. Many of 
the species also flourish on the granitic mountain-tops of northern 
New England. 
BARRIER-BEACH POND. 
Typha latifolia . Eleocharis palustris 
Sparganium fluctuans vd palustris, var. vigens 
Potamogeton alpinus Scirpus validus 
" epihydrus Nymphaea advena, var. variegata 
" natans Potentilla palustris (L.) Scop., 
Carex filiformis var. villosa (Pers.) Lehm. 
*  rostrata, var. utriculata Sium cicutaefolium 
Dulichium arundinaceum Menyanthes trifoliata 
The most vigorous of these fresh-water plants is Menyanthes, which 
occupies large areas of the shallow water, and works inland to some 
extent in peat-bog and swamp. The Potentilla is large and handsome, 
with big stalks, and long root-stocks. 
SWAMPS AND WET FIELDS. 
Salix lucida Glyceria canadensis 
Myrica Gale “ — grandis 
Alnus incana "Tama 
Pyrus melanocarpa * — mervata 
Rosa virginiana ‘pallida 
“ nitida *  Torreyana 
Rubus hispidus Carex conoidea 
Spiraea latifolia “ Crawfordii 
Ilex verticillata Crawfordii, var. vigens 
Lonicera caerulea, var. villosa crinita, var. gynandra 
Aspidjum cristatum " debilis, var. Rudgei 
y Thelypteris “ filiformis 
Asplenium Filix-femina “  hormathodes 
Osmunda cinnamomea “ limosa 
" Claytoniana *  Oederi, var. pumila 
Equisetum arvense * pallescens 
Agrostis alba “rostrata, var. utriculata 
Bromus ciliatus * — stellulata 
stellulata, var. angustata 
stellulata, var. cephalantha 
Calamagrostis canadensis 
Glyceria borealis 
