170 BOTANY OF MICHIGAN 



erly abundant in "tamarack swamps", but now very much less common 

 on account of drainage, fires, and lumbering. Small patches of it are 

 still (1910) noticed throughout the county, especially near the small 

 lakes. 



Picea mariana (Mill.) BSP. Black spruce. Occasional in swamps 

 mixed with tamaracks. Noticed in particular about Cat Lake. 



Tsuga canadensis (L.) Carr. Hemlock. Noticed in damp rich ground 

 with other trees near the small lakes. " Common along the western part 

 of Koylton Township and eastern part of Wells Township. ' C. A. 

 Davis. 



Thuja occidentalis L. Arbor vitae. White cedar. Common in many 

 places but not large. Noticed m particular in sandy ground along 

 Saginaw Bay shore, about swamps and on hillsides, and borders of 

 swamps about small lakes. "Frequent in swamps. In many places in 

 Akron Township appearing as undergrowth in the swampy woods. ' : 

 C. A. Davis. 



Juniperus communis L. Common juniper. Occasional in clrj^ open 

 or shaded ground. 



Juniperus communis depressa Pursh. Low juniper. Frequent in 

 dryish open rocky ground and near beach of Saginaw Bay. 



TYPHACEAE. Cat-tail Family 



Typha latifolia L. Common cat-tail. Abundant in very wet ground 

 and swampy places throughout. "Common in ditches and marshes. A 

 bad weed in the ditches of the western part of the county as it checks 

 the outflow of water and helps silt them up." C. A. Davis. 



Typha angustifolia L. Narrow-leaved cat-tail. Noticed in very wet 

 ground near the Saginaw Bay shore, in particular at Quanicassee. 



SPARGANIACEAE. Bur-reed Family 



Sparganium eurycarpum Engelm. Broad-fruited bur-reed. Very 

 common on borders of ponds, slow streams and in wet places. "Ditches, 

 very common. Also on borders of millponds at Vassar and Caro and in 

 bayous of Cass River. At mouth of Quanicassee Creek.' C. A. 

 Davis. 



Sparganium simplex Huds. Simple-stemmed bur-reed. "Ditches on 

 west side of county." C. A. Davis. 



NAJADACEAE. Pondweed Family 



Potamogeton natans L. Common floating pondweed. Noticed in 

 ponds and on borders of small lakes. 



Potamogeton epihydrus Raf. Nuttall's pondweed. "Quanicassee 

 Creek." C. A. Davis. 



