LIST OF ILLUSTRATIONS. 



PAGE 



Fig. 42. Thistle fruit with pappus 63 



43. Spotted orchis- flower 64 



44. Honey glands of Buttercup and Barberry . . 66 

 45. Disks of Orange and Mignonette .... 67 



46. Estivations 68 



47. Stamens of Pea 69 



48. Stamens of Bilberry, Heath, Barberry, and 



Mistletoe 70 



49. Transition from stamen to petal, and to sepal, 



in double rose 70 



50. Pollen grains of Orange, and of Buttercup 

 upon the stigma with their tubes descending 



to the ovule 71 



51. Pollen grains of Evening Primrose, and Cherry, 



both emitting pollen tubes 71 



52. Axile ovules 73 



53. Parietal ovules 73 



54. Growth of ovule of Celandine 74 



55. Longitudinal section of ovule of Heartsease . 75 

 56. Corolla of long-styled and short-styled Prim- 

 rose 77 



57. Section of flower of Orchis, showing a bee 

 standing upon the lip with its head touching 

 the sticky gland to which the pollen masses 

 are attached ; bee's head with the pollen 

 masses as removed ; the same with the pollen 

 masses after they have moved forwards . . 79 



58. Aggregate fruit of Mulberry 82 



59. Fruit of Pig cut vertically; male and female 



flowers 82 



60. Section of fruit of Nettle ; section of seed of 



the same, showing the embryo 83 



61. Fruit of Pea splitting into two valves ... 84 

 62. Fruit of Buttercup, cut open showing the seed ; 

 seed of the same cut open showing the small 

 embryo within the small albumen .... 84 

 63. Fruit of Bramble with stamens and calyx be- 

 neath it 85 



64. Fruit of Strawberry with calyx and bracts 



beneath it 85 



65. Fruit of Mallow surrounded with the calyx . 86 



66. Fruit of Apple cut across 87 



67. Pod of Wallflower with one valve coming off . 88 

 68. Experiment with bottle in basin 103 



