204 GEOLOGY OF OHIO. 



CXVI. Order IyEMNACF^E. Duckweed Family. 



521. LEMNA L. Duckweed. Duck's-meat. 



Lemna minor L. 



Throughout the state. 



Lemna minor orbiculaTa Austin. 

 Lorain Co., A. A. Wright ( Cat.) 



Lemna trisulca L. 



Generally distributed. 



522. SPIRODELA Schleiden. 



Spirodela polyrrhiza ( L.) Schleiden. 

 Frequent. 



523. WOLFFIA Horkel. 



WOLFFIA COLUMBIANA Karsten. 



Painesville, H. C. Beardslee (Cat), Wm. C.Werner; Licking Co., H. L. Jones 

 (Cat.) , Fairfield Co., E. V. Wilcox; Pond west of Big Miami, J). L. James. 



CXVII. Order ARACE^E, Arum Family. 



ACORUS L. Sweet-Flag. Calamus. 



Acorus calamus L. 



Throughout the State. 



525. SPATHYEMA Raf. {Symplocarpus Salisb.) Skunk Cabbage. 



SpaThyema foetid a (L.) Raf. ( Symplocarpus foetidus Salisb.) Skunk Cabbage. 

 Frequent 



526. CALLA L. Water Arum. 



Calla palustris L. 



Lorain Co., A. A. Wright (Cat.); Painesville, H. C. Beardslee (Cat); Ashtabula 

 Co., E. E. Bogue; Alliance, W. L. Crubaugh. 



527. PELTANDRA Raf. Arrow Arum. 



Peltandra virginica (L.) Raf. {P. undulata Raf.) 



Lorain Co., A.A.Wright (Cat); Cleveland, Wm. Krebs; Painesville, Wm. C. 

 Werner; Licking Co., H. L. Jones (Cat); Pickaway Co., J. L. Riddell (Synop. 

 1835). 



