42 MICHIGAN ACADEMY OF SCIENCE. 



SCHEUCHZERIACEiE Agardh. Arrow-Grass Family. 

 TRIGLOCHIN L. 



161. T. maritima L. Seaside Arrow-grass. Shores of Great Lakes; borders of 

 deer licks in interior; Macomb Co.; S. Mich., Wright Cat.; Hubbardston, Petosliey, 

 C. F. Wheeler; Algonac, W. S. Cooper. 



162. T. palustris L. Marsh Arrow-grass. Marshes. Frequent. Th. 



SCHEUCHZERIA L. 



163. S. palustris L. S. W. Wright Cat.; Macomb Co., Cooley; Hubbardston; 

 Montcalm Co.; Keweenaw Co., O. A. Farwell. Infrequent. 



ALISMACE^ D C. Water-Plantain Family. 

 ALISMA L. Water-Plantain. 



*164. A. plantago-aquatica L. Water Plantain. Shallow water. Common. Th. 

 165. A. tenellum Mart. Dwarf Water Plantain. EcJiinodorus parvulus Engelm. 

 A. B. Lyons; Gray's Manual, 6th edition. 



SAGITTARIA L. 



*166. S. arifolia Nutt. Arum-leaved Arrow-head. Alma, C. A. Davis; St. Clair 

 Co., C. K. Dodge; Belle Isle, O. A. Farwell. 



167. S. cristata Engelm. Crested Arrow-head. St. Clair Co., and Sarnia, C. K. • 

 Dodge. 



*168. S. graminea Michx. Grass-leaved Sagittaria. Dr. A. B. Lyons, Detroit; 

 Park Lake, Clinton Co., L. H. Bailey; Belle Isle, O. A. Farwell. S. 



*169. S. heterophylla Pursh. Elk Rapids, Winch. Cat.; Detroit, D. H. Campbell; 

 Alma, Chas. A. Davis. Th. 



*170. S. latifolia Willd. Broad-leaved Arrow-head. Wet places. Th. S. varia- 

 Mlis Engelm. 



171. S. rigida Pursh. 8. heterophylla rigida Engelm. Fruitport, E. J. Hill; 

 Great Lakes. 



VALLISNERIACEiE Dumort. Tape-Grass Family 

 PHILOTRIA Raf. (Elodea Michx.) 



*172. P. Canadensis (Michx.) Britton. Water-weed. Elodea Canadensis Michx. 

 Slow streams. Common. Th. 



VALLISNERIA L. 



*173. V, spiralis L. Tape-grass. Eel-grass. Ann Arbor, Winch. Cat.; S. Haven, 

 Bailey; Hubbardston, to Petoskey; Lake Superior, Agassiz. Slow streams. Com- 

 mon in Grand River and tributaries. Th. 



GRAMINEiE Juss. Grass Family. 

 ANDROPOGON L. 



*174. A. furcatus Muhl. Forked Beard-grass. Light soil. Common. Th. 

 *175. A. scoparius Michx. Broom Beard-grass. Sterile soil. Frequent, L. P. 

 176. A. scoparius multiramea Hack. Manistee, P. P. Daniels. 



SORGHASTRUM Nash. Crysopogon Benth. Not Trin. 



*177. S. avenaceum (Michx.) Nash. Indian Grass. Chrysopogon avenaceus 

 Benth. Dry banks and sandy fields. Variable. Infrequent. C. & S. 



