PLANTS OF IOWA 93 



1142. 8. radians, Kg. 

 On water plants. 



1143. 8. longipilus, Kg. 

 CELETOPHORA, Schrank. 



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

 Common, ponds. 



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



1146. C. monilifem, 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. 



FAMILY. 



CLADOPHORA. 



1151. C. fracta, Kuetz. 

 Common, in ponds. 



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



1153. C. fracta, var. rigidula, 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. genuina Kirch. 

 In rapid streams, on stones. 



