54 Tennessek Floka. 



SPATHYEMA Raf. Symplocarpus Salisb. 



Spathyema foetida (L.) Salisb. Symplocarpus' foetidus 

 Nutt. Mountain bogs, E. Tenn. ; Duck 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. 



LEMNACEJE 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. 



Wolfiia Columbiana Karst. Slightly submerged and fre- 

 quently adhering to othier 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. June, 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 TuUahoma. 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. Pipewort. Mountain mead- 

 ows of E. Tenn. June-October. 



