58 MICHIGAN ACADEMY OF SCIENCE. 



Hubbardston; Flint; Macomb Co., and northward; Alma, Ann Arbor, C. A. Davis. 

 Frequent. 



*593. C. umbellata Schk. Umbel-like Sedge. Grand Ledge, C. F. Wheeler; Kewee- 

 naw Co., O. A. Farwell; Manistee, F. P. Daniels. Rare. 



594. C. umbellata vicina Dewey. Alcona Co.; Keweenaw Co., O. A. Farwell; Grand 

 Ledge, C. F. Wheeler; St. Clair Co., C. K. Dodge. 



*595. C. utriculata Boott. Bottle Sedge. Swamps. Common. Th. 

 576. C. varia Muhl. Emmons' Sedge. Barron Lake; New Buifalo; Monroe Co.; 

 dunes of South Haven, L. H. Bailey; Oscoda Co.; Crawford Co.; Grand Traverse, Winch. 

 Cat.; Keweenaw Co., O. A. Farwell. 



597. C. virescens IMuhl. Dewey. Green Sedge. Detroit, O. A. Farwell; Wayne, 

 C. A. Davis. 



598. C. viridula Michx. Green Sedge. C. fiava mridula Bailey. Margins of lakes. 

 Frequent. Th. 



*599. C. vulpinoidea Michx. Fox Sedge. Low meadows. Common. Th. 

 GOO. C, Willdenovii Schk. Willdenow's Sedge. Bear Lake, Van Buren Co., E. J. 

 Hill. Rare. 



ARACEiE Neck. Arum Family. 



ARISAEMA Mart. 



•601. A. Dracontium (L.) Schott. Green Dragon. Dragon-root. C. & S. 

 *602. A. triphyllum (L.) Torr. Indian Turnip. Rich woods. Th. 



PELTANDRA Raf. 



*603. P. Virginica (L.) Kunth. Green Arrow-arum. P. vndulata Raf. S. Mich., 

 Wright Cat.; Huron River, Allmendinger Cat.; Ionia Co.; Bay Co., G. M. Bradford; 

 Flint. C. & S. 



CALLA L. 

 •604. C. palustris L. Water Arum. Bogs. Frequent. Th. 



SPATHYEMA Raf. Symplocakpus Salisb. 

 •605. S. foetida (L.) Raf. Skunk Cabbage. Symplocarims foetidus Nutt. Th. 



ACORUS L. 

 •606. A. Calamus L. Margin of streams. Infrequent. Th. 



LEMNACE^ Dumort. Duckweed Family. 

 SPIRODELA Schleid. 

 •607. S. polyrhiza (L.) Schleid. Greater Duckweed. Ponds. Common. 



LEMNA L. Duckweed. Duck's-meat. 



*608. L. minor L. Lesser Duckweed. Th. Ponds Blossoms occasionally in Jime. 

 Common. 



609. L. perpusilla Torr. Minute Duckweed. Detroit River, D. H. Campbell; Dr. 

 A. B. Lyons. Rare. C. & S. 



*610. L. trisulca L. Ivy-leaved Duckweed. Ponds. Frequent. C. & S. 



WOLFFIA Horkel. 



611. W. Columbiana Karst. Columbia Wolffia. Abundant on Maple River, Clinton 

 Co.; Ionia Co.; Detroit. J. M. Bigelow. 



612. W. punctata Griseb. Brazil Wolffia. W. Brasi1ien.iifi Engolin., not Wedd. 

 Abundant on Maple River, Clinton Co.; Ionia Co.; Detroit, J. M. Bigelow; Bay Co., 

 G. M. Bradford. 



