LIST OF ILLUSTRATIONS. 



FIGURE 



Hedge Bindweed {Convolznihis sepiuni). Frontispiece. 



1. A thin slice from a leaf, seen under the microscope 



2. Finger-veined leaves .... 



3. Feather-veined leaves .... 

 4 and 5. Types of lobed and divided leaves . 



6. Parallel-veined leaves .... 



7, 8, and 9. Roots of carrot, frogbit, and radish 



10. vSundew ....... 



11. An Australian pitcher plant 



12. Insect-eating pitchers of the Malayan nepenthes 

 Male and female flower of a sedge . 

 Beginnings of sex in a pond weed 

 Flower, with petals removed, showing stamens and 



pistil 



Grains of pollen sending out pollen-tubes 

 Flower of a shrubbery plant, Weigelia 



Pin-eyed primrose 



Thrum-eyed primrose .... 



20. Male and female flowers of arrowhead 



21. Flower of water-plantain .... 



22. Flower of orchid 



Pollen-masses of orchid .... 

 The two pollen-masses, very much enlarged 

 The common arum, or cuckoo-pint . 

 Spike of the cuckoo-pint .... 

 Male and female flower of salad-burnet . 

 Flowers of bur-reed ..... 

 Flowers of hazel 



30 and 31. Flowers of wheat .... 



32. Clusters of flowers 



33 and 34. Florets from the centre of a daisy . 



35. Floret from the ray of a daisy . 



36. Flower-head of a thistle .... 



37. 33, 39. 40, and 41. Forms of fruits . 

 42, 43, 44, and 45. Floating fruits . 

 46, 47, and 48. Adhesive fruits 

 49. First steps in the evolution of the stem . 



