x LIST OF ILLUSTRATIONS 



FIG. PAGE 



24. Leaf of Wood-Sorrel - - 71 



25. Transverse Section of Sun-Leaf of Whortleberry ( V actinium 



Myrtillus] - - 72 



26. Transverse Section of Shade-Leaf of Whortleberry - - 73 



27. Bird's-Foot Trefoil (Lotus corniculatus), showing Root- 



Nodules - - 95 



28. Underground Rhizome of Couch-Grass - 110 



29. Underground Rhizome of Mint - 1 10 



30. Basal Part of Potato Plant - 111 



31. Swede, showing Tuberous Hypocotyl - - 112 



32. Kohlrabi, showing Tuberous Stem bearing Leaf -Scars - 112 



33. False Oat-Grass (Arrhenatherum avenaceum) - - 113 



34. Convolvulus (Bindweed), twining Counter- Clock wise - - 117 



35. Hop, twining Clockwise - 117 



36. Passion-Flower - 118 



37. Stem-Tendrils of A mpdopsis Veitchii, showing Suckers - 119 



38. Everlasting Pea, with Leaf -Tendrils and Winged Stem 120 



39. Apex of a Root invested with a Mycorhiza - 124 



40. Corallorhiza innata (Coral-Root Orchid) - 125 



41. Lathrcea squamaria (Tooth wort), showing Underground Shoot 



bearing Scale-Leaves, attached to the Roots of Hazel by 



Absorbing Suckers - 127 



42. Cuscuta (Dodder) growing on Hop - 128 



43. Mistletoe attached by Haustoria to Branch of a Tree, Both 



seen in Section - - 129 



44. Drosera longifolia (Sundew) - 130 



45. Pinguicula vulgaris (Butterwort) - 131 



46. Utricularia vulgaris (Bladderwort), showing Bladders on 



Submerged dissected Leaves and absence of Roots - - 132 



47. Acorn with Hard Cupule - 137 



48. Edible Chestnut, with Three Nuts enclosed in Spiny Cupule - 137 



49. Stem of Barberry with Leaf-Spines - 141 



50. False Acacia (Robinia Pseudacacia) with Spiny Stipules 141 



51. Stinging Hair of Nettle - 141 



52. Longitudinal Section of Albuminous Seed of Onion - - 146 



53. Four-Seeded Drupe of HoUy - 147 



54. Longitudinal Section of Albuminous Seed of Poppy - - 147 



55. Longitudinal Section of Fruit of Garden Nasturtium, showing 



Exalbuminous Seed - 147 



56. Runner of the Strawberry - - 155 



57. Sucker of Elm - 155 



58. Houseleek, with Offsets - 156 



59. Tulip Bulb cut longitudinally - 157 



60. Narcissus Bulb cut longitudinally - - 157 



61. Crocus Corm in Resting Condition, with Enveloping Scale- 



Leaves removed to show Solid Stem - - - 158 



