LIST OF ILLUSTRATIONS xv 



FIG. PAGE 



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



(1870)] 196 



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



(1911)] 197 



28. Littorella lacustns, L. Water and land forms. [Gliick, H. (191 1)] . 198 



29. Caltha palustris, h. Submerged and air leaves. [Gliick, H. (191 1)] 199 



30. Cirsium anglicum, D. C. Land and water forms. [Gliick, H. (191 1)] 199 



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



loides (L.), Engelm, and Trifolium resuptnatum, L. [Gliick, H. 



(19")] 199 



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



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



[Schenck, H. (1884)] 202 



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



[Gliick, H. (191 1)] 203 



35. Ranunculus Flammula, Ij. Submerged form. [Gliick, H. (1911)] . 203 



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



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



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



[Hochreutiner, G. (1896)] 206 



38. Callitriche stagnalis, Scop. Root stele. [Schenck, H. (1886)] . 209 



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



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



(1889I)] 209 



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



[A, A.] 217 



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



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



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



44. Myriophyllum verticillatum, L. Habit drawing with inflorescence 



and turions. [A. A.] 221 



45. Myriophyllum verticillatum, L. Germinating turion. [A. A.] . . 222 



46. Myriophyllum verticillatum, L. Land form with turions. [Gliick, H. 



(1906)] 223 



47. Echinodorus ranunculoides, (L.) Engelm. var. repens f. terrestris. 



[Gluck, H. (1905)] 224 



48. Cfl/Jma ^ra/J2>//<2, (Bassi) Pari. With turions. [Gluck, 11.(1905)] 225 



49. C^Wma ^arw^j/z/b/z^z, (Bassi) Pari. With turions, [Gliick, H. (1905)] 225 



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



1893)] 229 



51. H ippur is vulgaris, 'L. Habit drawing. [A. A.] . . . .231 



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



53. Meter anther a duhia, (Jacq.) MacM. Cleistogamic flower. [Wylie, 



R. 3.(1917!)] 234 



