72 MICHIGAN ACADEMY OF SCIENCE. 



POLYGONACE^E Lindl. Buckwheat Family. 

 RUMEX L. 



862. R. Acetosa L. Sorrel Dock. Very abundant at Point-aux-Pins, above Sault 

 de Ste. Marie, Macoun; N. shore of Lake Superior, Pitcher, Trelease's Revision of 

 Rumex; Bay Co., G. M. Bradford. 



*863. R. Acetosella L. Field or Sheep Sorrel. Sterile fields. Common. Th. 



*864. R. altissimus Wood. Pale Dock. Sault de Ste. Marie, Winch. Cat.; Ionia; 

 near Ann Arbor, C. A. Davis. Apparently introduced at the College. Rare. 



*865. R. Britannica L. Great Water-dock. Wet places. Ann Arbor, C. A. Davis; 

 Ionia Co.; Flint; Macomb Co.; and northward. Frequent. 



*866. R. crispus L. Curled Dock. Narrow Dock. Everywhere in fields. Th. 

 866a. R. obtusifolius L. Broad-leaved Dock. Th. 



*867. R. obusifolius x crispus Trelease. North Manitou Isle., Mrs. Wislizenus. 

 Trelease, Revision of Rumex. 



*868. R. Patientia L. Patience Dock. Adventitious at Portland, C. F. Wheeler. 



869. R. salicifolius Weinm. White Dock. Shore of Little Traverse Bay, and north- 

 ward. Scarce. N. & U. P. 



870. R. sanguineus L. Red-veined Dock. Introduced from Europe. 

 *871. R. verticillatus L. Swamp Dock. River banks. Frequent. L. P. 



FAGOPYRUM Gaertn. 



*872. F. Fagopyrum (L.) Karst. Buckwheat. F. esculentum Moench. Persistent 

 in fields. 



POLYGONUM L. 



*873. P. amphibium L. Water Persicaria. Borders of ponds. Frequent. Th. 



874. P. arifolium L. Halberd-leaved Tear-thumb. Low grounds. South Haven, 

 L. H. Bailey; Gros. Cap, L. Mich. Winch. Cat.; Bay Co., G. M. Bradford; S. Mich., 

 Wright Cat. Infrequent. L. P. 



*875. P. aviculare L. Knot-grass. The commonest of weeds. Th. 



876. P. Careyi Olney, Carey's Persicaria. Fort Gratiot. Dr. Z. Pitcher. 



877. P. cilinode Michx. Fringed Black Bindweed. Copses. S. Haven, L. H. Bailey; 

 Huron and Roscommon counties, C. A. Davis. Common northward. Th. 



*878. P. Convolvulus L. Black Bindweed. Waste grounds. Common. Th. 



*879. P. dumetorun L. Detroit, O. A. Farwell. 



*880. P. emersum (Michx.) Britton. Swamp Persicaria. P. Muhleribergii S. Wats. 

 East shore of Lake Huron, J. Macoun; Ionia Co.; Flint; Grand Rapids; Indian River; 

 Black Lake; Cheboygan Co.; Alma, Ann Arbor; C. A. Davis; S. W., H. S. Pepoon. 



*881. P. erectum L. Erect Knot grass. Waste places. Common. 



*882. P. Hartwrightii A. Gray. Hart Wright's Persicaria. Kalamazoo, Tuthill; 

 Indian River; Black Lake, Cheboygan Co., B. and K.; Lena wee Co., W. J. B.; Kewee- 

 naw Co., O. A. Farwell; Ann Arbor, C. A. Davis. 



*883. P. Hydropiper L. Common Smartweed or Water-pepper. Moist grounds. 

 Common. Th. 



*884. P. hydropiperoides Michx. Mild Water-pepper. Wet places. Common. C. & S. 

 885. P. hydropiperoides Macouni Small. Detroit, 0. A. Farwell. 



*886. P. incarnatum Ell. Slender Pink Persicaria. Frequent. 



*887. P. lapathifolium L. Dock-leaved Persicaria. River banks. Ionia Co.; Grand 

 Rapids, Coleman Cat.; Keweenaw Co., O. A. Farwell. Frequent. 



888. P. lapathifolium incanum (Shmidt.) Koch. Keweenaw Co., 0. A. Farwell; L. 

 Superior, O. B. Wheeler. Th. 



889. P. lapathifolium nodosum (Pers.) Small. Escanaba, C. F. Wheeler; Detroit, 

 O. A. Farwell. 



*890. P. littorale Link. Shore Knotweed. Frequent. Th. 



*891. P. orientale L. Prince's Feather. Sparingly escaped from gardens. 



*892. P. Pennsylvanicum L. Pennsylvania Persicaria. Low grounds. Ionia Co.; 

 Clinton Co.; Flint; S. Mich., Wright Cat. Frequent. C. & S. 



*893. P. Persicaria L. Lady's Thumb. Waste places. Common. Th. 



*894. P. punctatum Ell. Water Smartweed. P. acre H. B. K. Wet places. Ann 



Arbor; Ionia Co.; Mackinac, Winch. Cat.; Flint. Frequent. L. P. 



