BEAL ON MICHIGAN FLORA. 39 



♦97. S. rupestris (L.) Spring?. Rock Selaginella. Flint; Woodward Lake; rare 

 in L. P.; but common in U. P. Park Lake, Clinton Co., C. F. Wheeler; Oscoda, 

 Grayling, Harrison, W. J. B.; Keweenaw Co., O. A. Farwell. Th. 



98. S. selaginoides (L.) Link. Low Selaginella. S. spinosa Beauv. Isle Royale, 

 Dr. A. B. Lyons; Keweenaw Co., O. A. Farwell. U. P. 



ISOETACE^ Underw. Quillwort Family. 

 ISOETES L. 



99. L. echinospora Braunii (Durieu) Engelm. Braun's Quillwort. Gray's 

 Manual. 



100. L. lacustris L. Lake Quillwort. River St. Marie, head of ship canal, T. C. 

 Porter; St. Clair River, W. S. Cooper. 



PINACEiE Lindl. Couiferie in part. Pine Family. 

 PINUS L. 



101. P. divaricata (Ait.) Gord. Gray Pine. Jack Pine. P. Banksiana Lambert 

 In the western part of the state noticed as far south as Grand Haven. Occurs at 

 south end of Lake Michigan in Indiana; Sand Pt., Port Austin, Saginaw Bay, and 

 northward along the shore of L. Huron, not common. Winch. Cat. In the central 

 part of the State this pine is first seen in the northern part of Clare Co., where it is 

 common in groves on sandy barrens. Trees sometimes grow 50 to 70 feet in 

 height and rarely have been measured with a diameter of two feet. 



102. P. resinosa Ait. Red Pine. Norway Pine. Dry woods. First noticed in 

 Isabella Co., in center of the L. P.; very abundant in Clare Co., and northward. 

 "Frequent on low, sandy plains in U. P., where it forms orchard-like groves," 

 Whitney. Usually 100 to 110 feet high. On the east side of the State it extends 

 southward to Port Huron, C. K. Dodge; Gratiot Co., C. A. Davis. 



*103. P. Strobus L. White Pine. Weymouth Pine. C. & N. W. 



LARIX Adans. 



*104. P. laricina (DuRoi) Koch. American Larch. Tamarack. L. Americana 

 Michx. Swamps. A slender tree southward, but sometimes reaching 100 feet in 

 height northward, where it is abundant. Th. 



PICEA Link. 



105. P. brevifolia Peck. Keweenaw Co., O. A. Farwell. 



106. P. Canadensis (Mill.) B. S. P. White Spruce. P. alba Link. From Luding- 

 ton to Alcona Co., W. J. B.; Bay Co., G. M. Bradford; Petoskey and northward. 

 N. & U. P. Common. 



*107. P. Mariana (Mill.) B. S. P. Black Spruce. P. nigra Link. Frequent north- 

 ward, and occasional south — a small tree in spagnous swamps. Th. 



TSUGA Carriere. 



*108. T. Canadensis (L.) Carriere. Hemlock. Grand Ledge. Rarely seen south 

 of latitude 43° except in the west, and scarce on the Huron shore, but common on 

 the east shore of Lake Michigan; Berrien Co., H. S. Pepoon, and from the central 

 part of the State northward. Very abundant and of great size in Emmet Co. Th. 

 except in S. E. 



ABIES Juss. 



109. A. balsamea (L.) Miller. Balsam or Balm-of-Gilead Fir. Frequent in the 

 northern part of Clare Co.; Bay Co., G. M. Bradford; abundant at Petoskey, and 

 northward. N. C. & U. P. 



THUJA L. THUYA." 



110. T. occidentalis L. Arbor Vitae. White Cedar. Lake Orion, Whitmore Lake. 

 C. A. Davis; Montcalm Co., and northward. 



