1894.I PLANTS OF MONROE COU\T\. 97 



792. R. crispus L. Curled Dock. 



Fields and waste places ; common. 



793. R. OBTUSIFOLIUS L. BlTTER DOCK. 



Fields, roadsides, waste places ; common. 



794. R. crispus L. X R. obtusifolius L. 



Reilly lot, Central avenue, Rochester. 



795. R. SANGUINEUS L. 



Rare. Prof. W. H . Lemion . 



796. R. Acetosella L. Sheep-Sorrel. 



Fields ; common. Abundant in poor, sandy soils. 



331. POLYGONUM Tourn. [L.] 



797. P. aviculare L. Knot-grass. 



Common in door-yards, streets, waste places, and along foot-paths. 



798. P. erectum L. {P. aviculare L. var. erectum Roth.) 



Waysides and waste places ; common. 



799. P. lapathifolium L. var. incarnatum Watson. {P. incarnatum Ell.) 



[P. incarnatum. Ell.] 



Marshes ; not common. Frequent in the marshes around Irondequoit 

 bay, Round pond, Long pond, etc. 



800. P. Pennsylvanicum L. 



In moist rich soil, brooksides, marshes, etc.; common. 



801. P. amphibium L. 



Aquatic ; rare . Kendall, Orleans county, M. S. Baxter. 



802. P. Muhienbergii Watson. {Polygonum amphibium var. terrestre Gray.) 



[P. emersujn (Michx.) Britton.] 



Muddy shores; not common. Irondequoit bay and other bays and 

 ponds. 



803. P. Hartwrightii Gray. [P. Hartwrightii A Gray.] 



Rare . Wayne county, E. L. Hankenson . 



804. P. orientale L. Prince's Feather. 



Waste places ; infrequent. 



805. P. Persicaria L. Lady's Thumb. 



Everywhere common. 



806. P. hydropiperoides Michx. Mild Water-pepper. 



Wet places, marshes ; infrequent. 



807. P. Hydropiper L. Smart-weed. 



Fields, ditches and wet places ; common. 



808. P. acre HBK. [P. punctatum Ell.] Water Smart-weed. 



Shores, marshes, ditches ; frequent. 



809. P. Virginianum L . 



Rich woods and along streams ; infrequent. 



810. P. arifolium L. Halberd-leaved Tear-thumb. 



Low grounds, marshes ; infrequent. 



13, Proc. Roch. Acad, of Sc, Vol. 3, April, 1896. 



