Marshall—The Vegetation of Twin Island. 
789 
P. and Car ex goodenovii L. Gay, though very few fruiting 
plants were seen. In among the grasses and sedges the marsh 
bellflower ( Campanula aparinoides (Pursh.) grew plentifully, 
and here and there the wild mint ( Mentha canadensis L.). 
Great numbers of violets ( Viola alsophila Greene (?) grew 
beneath the latter plants. And there was found a patch of ad¬ 
der’s tongue (0phioglossum vulgatum L.), the only one on the 
island, all within a radius of perhaps two feet. A few asters 
(Aster puniceus L.) were blooming abundantly, and Spiraea 
salicifolia L. mingled with the border plants. 
PLANTS OP THE BACK STRAND. 
Opioglossum vulgatum L. 
Asplenium felix-foemina (L.) Bernh. 
Onoclea sensibilis L. 
Dryopteris thelypteris (L.) A. Gray 
Typha latifolia L. 
Carex tuckermanni Dewey 
Carex goodenovii J. Gay. 
Carex alata Ton. 
Carex leporina L. 
Spartina cynosuroides (L.) Willd. 
Calamagrostis canadensis (Michx.) Beauv. 
Agrostis alba L. 
Phleum pratense L. 
Muhlenbergia tenuiflora (Willd.) B. S. P. 
Thalictrum polygamum Muhl. 
Viola alsophila Greene (?) 
Stellaria (Alsine) longifolia (Muhl.) Britton 
Populus tremuloides Michx. 
Salix linearifolia Bydb. 
Polygonum lapathifolium L. 
Polygonum dumetorum L. 
Polygonum sagittatum L. 
Celtis crassifolia Lam. 
Lysimachia terrestris (L.) B. S. P. 
Lysimachia thyrsiflora L. 
