LIST OF ILLUSTRATIONS xv 



FIG. PAGE 



126. Ranunculus aquatilis, L. Water and land seedlings. [Askenasy, E. 



(1870)] . .196 



127. Hottonia palustris, L. Land and water forms. [Prankerd, T. L. 



(1911)] . . . . 197 



128. Littorella lacustris, L. Water and land forms. [Gluck, H. (1911)] . 198 



129. Caltha palustris, L. Submerged and air leaves. [Gluck, H. (1911)] 199 



130. Cirsium anglicum, D. C. Land and water forms. [Gluck, H. (1911)] 199 



131. Water forms of Cuscuta alba, J. & C. Presl, Echinodorus ranuncu- 



loides (L.), Engelm. and Trifolium resupinatum, L. [Gluck, H. 

 (1911)] . .... 199 



132. Hydrocotyle vulgaris, L. Water shoot. [A. A.] .... 201 



133. Cardamine pratensis, L. Anatomy of aerial and submerged plants. 



[Schenck, H. (1884)] 202 



134. Ranunculus Flammula, L. Floating leaved form and land form. 



[Gluck, H. (1911)] . . 203 



135. Ranunculus Flammula, L. Submerged form. [Gluck, H. (1911)] . 203 



136. Hydrilla verticillata, Presl. Tendril roots. [Kirchner, O. von, Loew, 



E. and Schroter, C. (1908, etc.)] 205 



137. Zannichellia palustris, L. and Potamogeton densus, L. Tendril roots. 



[Hochreutiner, G. (1896)] 206 



138. Callitriche stagnalis, Scop. Root stele. [Schenck, H. (i 886)] . 209 



139. Vallisneria spiralis, L. Root anatomy. [Schenck, H. (1886)] . 209 



140. Naias major, All. and N. minor, All. Root anatomy. [Sauvageau, C. 



(1889!)]. ..... ... 209 



141. Cardamine pratensis, L. Leaves bearing adventitious plantlets. 



[A. A.] . . . .2,7 



142. Littorella lacustris, L. [A. A.] 218 



143. Utricularia intermedia, Hayne. Turion leaf and foliage leaf. 



[Goebel, K. (1891-1893)] 220 



144. Myriophyllum verticillatum, L. Habit drawing with inflorescence 



and turions. [A. A.] 221 



145. Myriophyllum verticittatum, L. Germinating turion. [A. A.] . . 222 



146. Myriophyllum verticillatum, L. Land form with turions. [Gluck, H. 



(1906)] . . ... 223 



147. Echinodorus ranuncukides, (L.) Engelm. var. repens f. terrestris. 



[Gliick, H. (1905)] . 224 



148. Caldesia parnassifolia, (Bassi) Parl. With turions. [Gliick, H. (1905)] 225 



149. Caldesia parnassifolia, (Bassi) Parl. With turions. [Gliick, H. (1905)] 225 



150. Utricularia inflata, Walt. Floating organs. [Goebel, K. (1891- 



1893)] ... . . .229 



151. Hippuris vulgaris, L. Habit drawing. [A. A.] . . . .231 



152. Peplis Portula, L. Flowers. [A. A.] 232 



153. Heter anther a dubia, (Jacq.) MacM. Cleistogamic flower. [Wylie, 



234 



