638 REPORT OF STATE GEOLOGIST. 



C. CONFINI8 (Willd.) Nutt. Bog Reed-grass. 



Confined to the northern counties of the State, where it is found 

 growing in swamps and low, wet bottom lands. 

 Flowers in July and August. 



AMMOPHILA Host. 



A. arenaria (L.) Link. Sea Sand-reed. Sea Mat- weed. 

 (Calamagrostis arenaria Roth.) 

 Found along the shores of Lake Michigan. 

 Flowers from August to September. 

 Lake (Hill). 



CALAMOVILFA Hack. 



C. longifolia (Hook.) Hack. Reed-grasses. 



(Calamagrostis longifolia Hook.) 

 On the beaches and sand stretches about the southern shore of 

 Lake Michigan ; probably confined to Lake and Porter counties. 

 Flowers in July and August. 

 Lake (Hill). 



HOLCUS L. 



H. lanatus L. Velvet-grass. 



Escaped from cultivation in many localities, and found in fields 

 and waste places, apparently thriving best in moist soils. 

 Fiowers in June and July. 

 Floyd (Clapp). 



DESCHAMPSIA Beauv. 



D. caespitosa (L.) Beauv. Tufted Hair-grass. 



In wet places on shores of lakes and streams. 

 Flowering season from July until August. 

 Steuben (Bradner). 



D. flexuosa (L.) Trin. Common Hair-grass. 



Common in dry soil, in many parts of the State. 

 Flowers in June and July. 



TRISETUM Pers. 



T. Pennsylvanicum (L.) Beauv. Marsh False Oat. 



(T. palmtre Torr.) 

 Common in low, wet soils, in various counties of the State, per- 

 haps more abundantly northward. 

 Flowers in June and July. 



