38 MICHIGAN ACADEMY OF SCIENCE. 



EQUISETACE.E Michx. Horsetail Family. 

 EQUISETUM L. 



*68. E. arvense L. Common Horsetail. Damp sandy grounds. Common. Th. 



69. E. arvense campestre Schultz. Keweenaw Co., O. A. Farwell. 



70. E. arvense riparium Milde. Keweenaw Co., O. A. Farwell. 



*71. E. fluviatile L. Swamp Horsetail. E. limosum L. In shallow water. Com- 

 mon. Th. 



72. E. fluviatile polystachyon (Bruckner) Prayer. Keweenaw Co., O. A. Farwell. 

 *73. E. hyemale L. Scouring-Rush. Wet banks, common. Th. 

 *74. E. hyemale ramigerum A. Br. Keweenaw Co., O. A. Farwell. 



75. E. laevigatum A. Br. Smooth Scouring-rush. Port Huron, C. K. Dodge; 

 Manistee, F. P. Daniels. 



76. E. littorale Kuehl. Shore Horsetail. New Buffalo; Oscoda; Keweenaw Co., 

 O. A. Farwell. 



77. E. palustre L. Marsh Horsetail. Lake Huron to the Arctic Sea. (Hook, PI.) 

 U. P. 



*78. E. pratense Ehrh. Thicket Horsetail. Macomb Co.; Flint; to Pine Lake, 

 Emmet Co., Winch. Cat.; Keweenaw Co., O. A. Farwell. Th. 



*79. E. robustum A. Br. Stout Scouring-rush. Port Huron, C. K. Dodge; Mo- 

 renci, W. J. B.; Manistee, F. P. Daniels. 



80. E. scirpoides Michx. Sedge-like Equisetum. Macomb Co.; Flint; Hubbards- 

 ton; Petoskey; to L. Superior, Whitney Cat., O. A. Farwell. Th. 



*81. E. sylvaticum L. Wood Horse-tail. Ann Arbor, rare, Allmend. Cat.; Clin- 

 ton Co.; Montcalm Co.; Flint; and northward where it is common. Th. 



82. E. variegatum Schleich. Variegated Equisetum. S. E., Winch. Cat.; Hub- 

 bardston; Muir; Macomb Co.; Flint; sand dunes at the head of Little Traverse Bay; 

 Drummond's I., Port Huron, C. K. Dodge; Detroit and Keweenaw Co., O. A. Farwell. 

 Infrequent. Th. 



LYCOPODIACEJE Michx. Club-Moss Family. 

 LYCOPODIUM L. 



83. L. alpinum L. Alpine Club-moss. Keweenaw Co., O. A. Farwell. 



84. L. annotinum L. Stiff Club-moss. Woods. Petoskey to L. Superior; St. 

 Glair Co., C. K. Dodge. Common. 



85. L. Chamaecyparissus A. B. L. complanatum Chamaecyparissus D. C. Eaton. 

 Tp. of Arthur, Clare Co., May 15, 1849, G. H. Cannon; Keweenaw Co., O. A. Farwell; 

 Manistee, F. P. Daniels. 



*86. L. clavatum L. Common Club-moss. Dry woods. Common. Th. N. & U. P. 

 87. L. clavatum monostachyon Hook. Keweenaw Co., O. A. Farwell. 



*88. L. complanatum L. Ground-Pine. Bangor, Van Buren Co., Bailey; shore of 

 Pine Lake; Keweenaw Co., O. A. Farwell; Woodward Lake, Ionia Co.; Flint; 

 Macomb Co., Stanton, and northward. Th. 



89. L. inundatum L. Bog Club-moss. Drummond's I.; Willow River, Huron Co.; 

 Sugar Is., Winch. Cat.; Keweenaw Co., O. A. Farwell. Th. 



*90. L. lucidulum Michx. Shining Club-moss. Moist woods. Frequent. Th. 



*91. L. obscurum L. Ground Pine. Moist woods. 



92. L. obscurum dendroideum D. C. Eaton. Macomb Co., Cooley; Keweenaw Co., 

 O. A. Farwell, near Port Huron, C. K. Dodge; Oscoda. 



93. L. porophilum Lloyd & Underw. Keweenaw Co., O. A. Farwell. 



94. L. sabinaefolium Willd. Cedar-like Club-Moss. Keweenaw Co., O. A. Farwell. 

 Rare. 



95. L. Selago L. Fir Club-moss. Lake Superior, Gray's Manual; Keweenaw Co., 

 O. A. Farwell. Infrequent U. P. 



SELAGINELLACE^E Underw. 

 SELAGINELLA Beauv. 



*96. S. apus (L.) Spring. Creeping Selaginella. Ann Arbor, Allmendinger 

 Cat.; Hubbardston, Grand Ledge, C. F. Wheeler; Orion, O. A. Farwell; Port Huron, 

 W. S. Cooper and C. K. Dodge; Alma and Ann Arbor, C. A. Davis. Infrequent. 



