MICHIGAN ACADEMY OF SCIENCE. 147 



villages, on roadsides, and along railways. Fast creeping into damp meadows. 

 Liable to become a vicious weed. When mixed in hay said to be very danger- 

 ous to stock, the beards being more injurious than those of common barley. 



Secale cereale L. Rye. — Often inclined to persist a few years in fields 

 and along railway's. 



Elymus virginicus L. Virginia Wild Rye. — Frequent in moist ground and 

 along the damp lianks of streams. 



Elymus canadensis L. Nodding Wild Rye. — Common on dry and sandy 

 ground especially along the Lake Huron shore. A good sand-binder. 



Elymus striatus Willd. Slender Wild Rye.- — Occasional in open woods 

 and along shaded banks of streams. 



Hystrix patula Muench. Bottle-brush Grass. — Common in damp open 

 woods and thickets. 



Cyperaceae. Sedge Family. 



Cyperus diandrus Torr. Low Cyperus. — Common in wet and marshy 

 places. 



Cyperus rivularis Kunth. Shining Cyperus. — Frequent in wet ground. 



Cyperus esculentus L. Yellow Nut Grass. — Occasional. Often a vicious 

 weed in cultivated grounds, but not yet troublesome here so far as observed. 



Cyperus strigosus L. Straw-colored Cyperus. — Frequent in moist 

 meadows and along the grassy low banks of streams. 



Cyperus houghtonii Torr. Houghton's Cyperus. — Occasional in dry and 

 sandy ground. Usually near the lake shore. 



Cyperus filiculmis Vahl. Slender Cyperus. — Common on dry and poor 

 ground. 



Dulichium arundinaceum (L.) Britton. Dulichium. — Frequent in swamps 

 and on borders of ponds. 



Eleocharis quadrangulata (Michx.) R. and S. Quadrangular Spike Rush. — 

 Occasional in shallow water. Noticed in Sarnia Bay and near the mouths of 

 St. Clair River. 



Eleocharis obtusa (Willd.) Schultes. Spike Rush. — Common in damp 

 open ground. 



Eleocharis palustris (L.) R. and S. Creeping Spike Rush. — Very common 

 in shallow water and wet grassy ground. 



Eleocharis palustris glaucescens (Willd.) Gray. Slender Creeping Spike 

 Rush. — Freciuent on clamp grassy ground. 



Eleocharis palustris calva (Torr.) Gray. Naked Creeping Spike Rush. 

 — Abundant in Sarnia Bay and still water near the mouths of St. Clair River. 



Eleocharis palustris vigens Bailey, Larger Creeping Spike Rush. — Fre- 

 quent in water along St. Clair River, especially its mouths. 



Eleocharis acicularis (L.) R. and S. Needle Spike Rush. — Common 

 around living springs and on wet and muddy shores. 



Eleocharis tenuis (Willd.) Schultes. Slender Spike Rush. — Frequent on 

 wet and marshy ground. 



Eleocharis acuminata (Muhl) Nees. Flat-stemmed Spike Rush. — Fre- 

 quent on wet and marshy ground. 



Stenophyllus capillaris (L.) Britton. Hair-like Stenophyllus. — Occasional 

 in dry and sandy 0])('n ground. 



Fimbristylis castanea (Michx.) Vahl. Marsh Fimbristyhs. — Abundant in 

 prairie-like ground on the delta islands of St. Clair River. Not noticed else- 

 where. 



Scirpus nanus Spreng. Dwarf Club Rush. — Occasional in wet ground. 



