138 BOTANY OF MICHIGAN 



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Scirpus validus Vahl. Great bulrush. Margins of ponds throughout. 

 Frequent. 



Scirpus occidentalis (Wats.) Chase. Viscid great bulrush. Very wet 

 marshy places and in shallow water throughout. Common. 



Scirpus atrovirens Muhl. Dark-green bulrush. Marshy open places 

 and in swamps throughout. Common and in spots abundant. 



Scirpus cyperinus pelius Fernald. Wool grass. Wet open meadow- 

 like ground, and often in slight shade. Common throughout. 



Scirpus atrocinctus Fernald. Dark wool grass. In open meadow- 

 like ground and swamps with slight shade. Frequent throughout. 



Scirpus atrocinctus brachypodus Fernald. Clustered wool grass. In 

 meadow-like ground near Vermilion. Abundant. N. A. Wood. 



Eriophorum callitrix Cham. Hare's tail. Open bogs. Common 

 throughout. 



Eriophorum gracile Roth. Slender cotton, grass. Open bogs and 

 swamps throughout. Abundant in one place near the lighthouse at 

 Whitefish Point. 



Eriophorum tenellum Nutt. Rough cotton grass. Occasional in open 

 wet and swampy places throughout. Plentiful near Vermilion. 



Eriophorum angustifolium Roth. Tall cotton grass. Wet boggy 

 places throughout. Plentiful near Vermilion. 



Eriophorum viridi-cari?iatum (Engelm.) Fernald. Thin leaved cotton 

 grass. Borders of, and open spots in, tamarack-black spruce swamps. 

 Common throughout. 



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Eriophorum virginicum L. Virginia cotton grass. Open bogs and wet 

 meadow-like ground. Common throughout. 



Kynchospora alba (L.) Vahl. White beak rush. Wet boggy open 

 ground throughout. Common. 



Cladium mariscoides (Muhl.) Torr. Twig rush. Bogs and very wet- 

 sandy ground. Frequent. 



Car ex scoparia Schkuhr. Pointed broom sedge. Open damp or dryish 

 ground throughout. Frequent 



Carex iribidoides Wahlenb. Blunt brown sedge. Wet places and 

 damp meadow-like open ground. Frequent throughout. 



Carex siccata Dewey. Hillside sedge. Dry open sandy ground. Oc- 

 casional throughout. 



Carex crawfordii Fernald. Crawford's sedge. Drj- open ground at 

 Emerson, Vermilion and Whitefish Point. Plentiful. 



Carex albolutescens Schwein. Greenish-white sedge. Damp or drjdsh 

 ground near Emerson, Whitefish Point and Vermilion. Plentiful. 



Carex tenera Dewey. Straw sedge. Dry open spots in woods near 

 lower falls of the Tahquamenon River above Emerson. Apparently 

 infrequent. 



