130 Rhodora ' [May 
* Ostrya Virginica, Willd. Solidago Canadensis, L. 
* Castanea sativa Americana, Gray. S. rugosa, Mill. 
* Fagus ferruginea, Ait. Aster undulatus, L. 
* Tsuga Canadensis, Carr. Geum album, Gmelin. 
? Rhus typhina, L. Lespedeza polystachya, Michx. 
°R. glabra, E. Geranium maculatum, L. 
? Rubus Canadensis, L. Anemone nemorosa, L. 
? R. occidentalis, L. A. Virginica, L. 
? Corylus Americana, Walt. Hieracium scabrum, Michx. 
? C. rostrata, Ait. Carex Pennsylvanica, Lam. 
? Vaccinium vacillans Soland. Desmodium paniculatum, DC. 
? Myrica asplenifolia, Endl. Polygala paucifolia, Willd. 
Lysimachia quadrifolia, L. Baptisia tinctoria, R. Br. 
Melampyrum Americanum, Michx. Bidens frondosa, L. 
s. SAND-POND MARGIN Formation. ZZygrofAytes. 
Habitat: wet open sandy places, about ponds and along streams ; 
passing into (3) above and into (12) below. Very local and species 
few but characteristic; mainly in the Plymouth and Cape Cod regions. 
Coreopsis rosea, Nutt. Hemicarpha subsquarrosa, Nees. 
Drosera filiformis, Raf. Eleocharis tuberculosa, R. Br. 
D. intermedia Americana, DC. Panicum virgatum, L. 
Viola lanceolata, L. P. verrucosum, Muhl. 
Rhexia Virginica, L. Solidago tenuifolia, Pursh. 
Utricularia resupinata,B.D.Greene. Stachys hyssopifolia, Michx. 
U. cornuta, Michx. Cyperus aristatus, Rottb. 
Hypericum Canadense, L. Bartonia tenella, Muhl. 
Polygala sanguinea, L. Ranunculus Cymbalaria, Pursh. 
Lobelia Dortmanna, L. Myriophyllum tenellum, Bigel. 
Juncus pelocarpus, E. Meyer. Cyperus flavescens, L. 
J. dichotomus, EN. Eriocaulon septangulare, With. 
Cyperus dentatus, Torr. Eleocharis olivacea, Torr. ! 
Psilocarya scirpoides, Torr. Juncus Greenei, Oakes & Tuckerm. 
Eleocharis melanocarpa, Torr. Fimbristylis autumnalis, R. & S. 
6. Low-MEgaApow FoRMaTION. ZZygropAytes. 
Habitat: wet open places with argillaceous soil; often denomi- 
nated “low open places,” “swamp and stream margins," “about 
springs,” “wet meadows,” “muddy pond margins,” * brooksides,” 
“river-banks,” “wet thickets,” &c; passes normally into (4) above 
and into (9), (11) or (13) below. Flora abundant and characteristic. 
