80 BOTANY OF MICHIGAN 



Equisetum sylvaticum L. Wood horsetail. Common in clamp shaded 

 ground. 



Equisetum fluviatile L. Swamp horsetail. Tn very wet and muddy 

 open ground or often in shallow water. Common and often abundant. 



Equisetum hyemale L. Common scouring rush. In dry open ground 

 and often on sides and crests of sand dunes acting as a fairly efficient 

 sand binder. Noticed in particular east of Manistique on large dunes. 

 See Britton & Brown's "Illustrated Flora/' Second Edition, Volume I, 

 page 41. 



Equisetum variegatum Schleigh. Varigated equisetum. Frequent 

 along the sandy beaches of Lake Michigan and Lake Superior. 



Equisetum scirpoides Michx. Sedge-like equisetum. In dryish open 

 or shaded places, but easily overlooked. Frequent. 



LYCOPODIACEAE. Club Moss Family 



Lycopodium lucidulum Michx. Shining club-moss. In damp shaded 

 ground. Frequent. 



Lycopodium inundatum L. Bog club-moss. In clamp sandy open 

 ground. Noticed in particular as abundant near Manistique, not far 

 from the Lake Michigan shore. 



Lycopodium annotinum L. Stiff club-moss. Usually in shade. Often 

 very abundant in hardwoods. A vine-like evergreen plant. 



Lycopodium clavatum L. Common club-moss. Running pine. T)ry- 

 ish open woods and often very abundant. Noticed in particular as very 

 abundant on the farm of W. T. S. Cornell near Hiawatha. A beautiful 

 vine-like plant, extensively creeping. 



Lycopodium obscurum L. Ground pine. Plentiful in rch woods. 

 Appearing like a small pine shrub and much resembling the following. 



Lycopodium obscurum dendroideum (Michx.) D. C. Eaton. Tree-like 

 ground pine. In rich woods and apparently the more common form. 

 The difference between these two forms seems very obscure. 



Lycopodium complanatum L. Trailing Christmas-green. In dry 

 sanely ground and usually among pines. Often abundant. 



Lycopodium tristachyum Pursh. Festoon club-moss. In dry sandy 

 open or partially shaded ground. Abundant in spots. Cornell. 



SELACINELLACEAE. Selaginella Family . 



Selaginella apus (L.) Spring. Creeping selaginella. In low damp 

 open or partially shaded places. Often abundant. A very pretty little 

 moss-like plant. 



TMACEAE. Yew Family 



Taxus canadensis Marsh. American yew. Ground hemlock. In 

 tamarack-black sprue swamps and often very abundant in hardwoods. 



