82 



with leayes rather distant; shading by other vegetation 

 may be a main factor bere, however, as the writer found 

 nearly the type of the upright shoots in floating plants 

 at Forest Home, while the slender Renwick specimens were 

 from a tangle of wet- ground plants. 



37* Radicnla palustris (L.) Moench. 



Soientiflo name: 



Sisymbrium amphibium var . palustre L. 

 Sp. PI. 657.. 1753. 



Nasturtium terrestre R. Br. in Ait. 



Hort. Kew. Ed. 2, 4: 110. 1812. 



Nasturtium palustre D. G. Syst. 2. 191. 1821. 



Roripa palustris Bess. Enum. 27. 1821. 



Radicula palustris Muench. (Date?) 

 Why palustris , and not terrestris , is the true species - 

 name under the Vienna Code (See 6. M.) is not clear to 

 the writer, unless Muenchhausen applied it as a species- 

 name before Robert Brown publisht terrestre for the species. 



Common names: 



Marsh water-cress. 

 Yellow water-cress. 



