PLANTS OF IOWA , j3 



1142. S. radians, Kg. 

 On water plants. 



1143. 8. longipilus, Kg. 

 Ch^tophora, Schrank. 



1144. C. pisiformis, (Roth.) Agardh. 

 Common, ponds. 



1145. C. incrassata, (Hudson) Hazen. (Cornu-dama.) 



1146. C. monilifera, Kutz. 

 On Cladophora. 



1147. C. cornudamce, (Roth.) Ag. 

 Draparnaldia, Ag. 



1148. D. plumosa, (Vauch.) Agardh. 



In clear water attached to stones or plants. 



1149. D. glomerata, (Vauch.) Agardh. 

 On stones and plants. 



Chroolepus, Ag. 



1150. C. umbrina, Kg. 

 On oak trees. 



CHADOPHORACE^l FAMILY. 



Cladophora. 



1151. 0. fracta, Kuetz. 

 Common, in ponds. 



1152. C. fracta, var. fossypina, Rabenh. 



1153. 0. fracta, var. rigidida, Rabenh. 

 Floating in ponds. 



1154. C. crispata, Kuetz. 

 In quiet waters. 



1155. C. glomerata, var. rivularis, Rabenh. 

 Quiet waters. 



1156. C. glomerata, var. pumila, Bail. 

 Quiet water, on stone or wood. 



1157. C. glomerata, Kuetz. 

 Common in streams, on weeds. 



1158. C. glomerata, var. gcnuina Kirch. 

 In rapid streams, on stones. 



