54 Tennessee Flora. 



SPATHYEMA Raf. Symplocarpus Salisb. 



Spathyema fcEtida (L.) Salisb. Symplocarpus foetidus 

 Nutt. Alountain bogs, E. Tenn. ; Dnck River, M. Tenn. 

 Skunk cabbage. February-April. M. 



ORONTIUM L. 



Orontium aquaticum L. Golden Club. Cleveland. E. Tenn. 

 With Peltandra. April. 



ACORUS L. 



Acorus Calamus L. Calamus root. E. Tenn. Perhaps- 

 from imported stock. Cultivated here and there. M. 



LEMNACE.E Dumort. 



SPIRODELA Schleid. 



Spirodela polyrhiza (L.) Schleiden. In all ponds. O. S. 



LEMNA L. 



Lemna trisulca L. Ponds and ditches. O. S. 



L. gibba L. Duck weed. In all ponds. O. S. 



L. minor L. With the former. 



L. perpusilla Torr. Shelby Pond, Nashville. June, July. 



WOLFFIA Horkel. 



Wolffia Columbiana Karst. Slightly submerged and fre- 

 quently adhering to other aquatics. Stagnant ponds near 

 Nashville. June, July. 



W. Brasiliensis Weddel. Floating on the surface. In a 

 pond on the grounds of the Tennessee Hospital for the In- 

 sane. Jime, July. 



XYRIDACE^ Lindley. 

 XYRIS L. 



Xyris flexuosa Miihl. Yellow-eyed grass. In a swamp in 

 Hadley's Bend, in Davidson County. Marshy regions in the 

 oak barrens at Tullahoma. July-September. 



X. montana H. Ries. X. flexuosa var. pusilla Gray. Moun- 

 tain meadows and brooks. Mts. of E. Tenn. July, August. 



ERIOCAULONACE^. 



ERIOCAULON Lindl. 



Eriocaulon decangulare L. i'ipewort. Mountain mead- 

 ows of E. Tenn. June-October. 



