No. 14.] FLOWERING PLANTS AND FERNS. Ill 



ORONTIUM L. Golden Club. 

 Orontium aquaticum L. (aquatic). 

 Golden Club. 



Occasional or local. Mostly in shallow waters of the larger 

 rivers and their tributaries where extensive colonies are often 

 formed ; sometimes in swamps and along small streams. May 

 — early June ; fruit June — July. 



The seeds and rootstocks are said to have been used for 

 food by the Indians after destroying, by cooking, the acrid 

 principle which they contain. 



ACORUS L. Sweet Flag. Calamus. 

 Acorus Calamus L. (classical name for some Reed). 

 Sweet Flag. Calamus. 



Frequent. Wet meadows, swamps and borders of ponds 

 and streams, often forming large colonies. May — June. 



The aromatic rootstock is often candied, is of some medici- 

 nal value and is officinal. 



LEMNACEAE. DUCKWEED FAMILY. 



SPIRODELA Schleid. 

 Spirodela polyrhiza (L.) Schleid. (many-rooted). 

 Greater Duckweed. 



On still water of ponds and pools. Occasional in the south- 

 eastern part of the state ; frequent or locally common else- 

 where. July — Aug. 

 Rarely seen in flower. 



LEMNA L. Duckweed. Duck's-meat. 

 Lemna trisulca L. (three-furrowed). 

 Duck's-meat. 



Still or running water. Rare in the south central, occa- 

 sional in the southwestern, frequent to common in the northern 

 and western parts of the state ; not reported from the eastern 

 portion. July. 



Lemna valdiviana Philippi. 

 Lemna cyclostasa of authors. 



Shallow water of ponds and rapid waters of brooks and 

 rivers. Occasional in the southeastern, locally common in the 



