1905] Blankinship, — Plant-formations of E. Massachusetts 131 
? Cornus sericea, L'Her. L. sznuatus, L. 
? Pyrus arbutifolia, L. f. Epilobium coloratum, Muhl. 
? Rubus hispidus, L. Polygonum acre, HBK. 
° Spiræa salicifolia, L. P. Hydropiper, L. 
° S. tomentosa, L. Arenaria lateriflora, L. 
° Vaccinium corymbosum, L. Gerardia purpurea paupercula, Gray. 
? Salix discolor, Muhl. Houstonia cerulea, L. 
? S, rostrata, Rich. & other spp. Eupatorium purpureum, L. 
? Viburnum dentatum, L. Hypericum mutilum, L. 
? [lex verticillata, Gray. Viola blanda, Willd. 
Spiranthes cernua, Rich. V. lanceolata, L 
Lysimachia stricta, Ait. Tris versicolor, L. 
Steironema ciliatum, Raf. Elodes campanulata, Pursh. 
Saxifraga Pennsylvanica, L. Mimulus ringens, L. 
Eupatorium perfoliatum, L. Cyperus strigosus, L. 
Glyceria Canadensis, Trin. Lobelia spicata, Lam. 
Hypericum ellipticum, Hook. Juncus effusus, L. 
Scirpus atrovirens, Muhl. Aspidium Thelypteris, Swartz. 
Carex crinita, Lam. & other spp. A. Noveboracense, Swartz. 
Eleocharis ovata, R. Br. Aster paniculatus, Lam. 
E. acicularis, R. Br. Bidens connata, Muhl. 
Ranunculus septentrionalis, Poir. B. cernua, L. 
Solidago lanceolata, L. Asclepias incarnata pulchra, Pers. 
Phragmites communis, Trin. Cardamine Pennsylvanica, Muhl. 
Lycopus Virginicus, L. 
7. SEA-SHORE FORMATION. Halohygrophytes. 
Habitat: sandy sea-beaches and high-tide flats, or sandy sea-shore 
immediately adjacent; soil more or less saline, passes into (3) above 
and (14) below. Flora sparse ; species few and characteristic. 
Cakile Americana, Nutt. A. caudata, Michx. 
* Prunus maritima, Wang. Salsola Kali, L. 
Euphorbia polygontfolia, L. Xanthium Canadense echinatum, 
Chenopodium rubrum, L. Gray. 
Atriplex arenarium, Nutt. Ammophila arundinacea, Host. 
Glaux maritima, L. Lathyrus maritimus, Bigel. 
Arenaria peploides, L. Polygonella articulata, Meisn. 
Triodia purpurea, Hack. Solidago sempervirens, L. 
Statice Limonium Caroliniana, Gray. Buda maritima, Dumort. 
Artemisia Stelleriana, Bess. Salicornia ambigua, Michx. 
8. Low-WooDLAND FORMATION. Aygrophytes. 
Habitat: low alluvial woodlands ; soil moist with deep shade and 
much humus; substratum unimportant; passes from (3) or (4) above 
into any lowland or aquatic formation; often spoken of as “low 
