98 ROCHESTER ACADEMY OF SCIENCE. [Oct. 8, 



811. P. sagittatum L. Arrow-leaved Tear-thumb. 



Low grounds and marshes ; common. A form with peduncles armed 

 with fine saw-toothed prickles is frequent. 



812. P. Convolvulus L. Black Bind-wef.d. 



Cultivated and waste grounds ; common . 



813. P. cilinode Michx. 



Rare. Sodus bay, G. T. Fish, E . L. Hankenson . 



814. P. dumetorum L. Climbing False-Buckwheat. 



Marshes; frequent. 



815. P. dumetorum L. var. scandens Gray. [P. scandens L.] 



Marshes and banks of streams ; frequent. 



332. FAGOPYRUM Tourn. [Grertn.] 



816. F. esculentum Mcench. [F. Fagoftyrum 'L.) Karst.] Buckwheat. 



Borders of fields ; frequent. 



333. POLYGONELLA Michx. 



817. P. articulata Meisner. {Polygonum articnlatui?i Gray.) [Po/ygonella 



articulata (L.) Meisner.] 



Rare. Oak openings at Charlotte, Bradley. 



ARISTOLOCHIACEyE . 



334. ASA RUM Tourn. [L.] 



818. A. Canadense L. Wild Ginger. 



Sides of ravines and in rich woods ; frequent. 



PIPERACE^. [SAURURACEyE.] 

 335- SAURURUS L. 



819. S. cernuus L. Lizard's-Tail. 



Swamps and borders of marshes ; frequent. 



LAURACE.E. 



336. SASSAFRAS Nees. [Nees & Eberm.] 



820. S. officinale Nees. [S. Sassafras (L.) Karst.] Sassafras. 



Rich woods, river banks, sides of ravines, hills ; common. 



337. LINDERA Thunb. [Benzoin Fabric] 



821. L. Benzoin Blume. [Benzoin Benzoin (L.) Coulter.] Spice bush. 



Damp copses, marshes ; frequent. 



THYMEL^ACE^E. 



338. DIRCA L. 



822. D. palustris L. Leather-wood. 



Rich woods, river banks, ravine sides ; infrequent. 



339. DAPHNE L. 



823. D. Mezerkum L. 



Introduced ; rare. Woods in Seneca park, //. B. Brown. Mt. Read, 

 Greece, A\ J. Fleming. 



