INDEX 
Insects, vision of, 171. 
Insertion-of floral organs, *156. 
Internode, 26, 65. 
Involucre, App. I, *359. 
Ipomoea Jalapa, 38. 
Ipomea, rate of increase of, 201,202. 
Irritability in plants, nature and 
occurrence of, 45. 
Ivy, aérial roots of, 30, *31. 
Keel, *150. 
Kidney-shaped, App. I, #355. 
Labiate, *152. 
Lanceolate, App. I, #355. 
Lateral buds, 59, *88, *89. 
Leaf, 97-142*. 
Leaf, accumulation of mineral 
matter in, 136. 
Leaf, fall of, 141, 142. 
Leaf-arrangement, 105-108*. 
Leaf-bases, App. I, *856. 
Leaf-buds, *89, *90. 
Leaf-like stems, 61, *62, 63. 
Leaf-margins, App. I, *357. 
Leaf-mosaic, 106, ¥107. 
Leaf-outlines, App. I, *855. 
Leaf-sections, 127, #128. 
Leaf-spine, *123, 124. 
Leaf-stalk, *98. 
Leaf-tendril, *103. 
Leaf-tips, App. I, #356. 
Leaf-traces, 79, 180. 
Leaves as insect-traps, 119-122*. 
Leaves, compound, *102, #103, 104. 
Leaves, cutting, 125, *126. 
Leaves, divided, *99, *100, 107, 
108, *110. 
Leaves, functions of, 130-142*. 
Leaves, movements of, 108-112*. 
373 
Leaves, simple, 97-103*. 
Leaves, structure of, 127-130*. 
Legume, 183, 187, #194. 
Lemon, study of, 181, 182. 
Lenticels, 76. 
Lianas, 56. 
Lichens, 253-255*. 
Life histories, *277, *285. 
Light, exposure to, 105-112*. 
Light, movements towards, *111, 
112. 
Lily leaf, 127. 
Lily, pollen grains producing tubes 
on stigma, *165. 
Limb of calyx or corolla, 152. 
Lime, 135. : 
Linden, fruit cluster of, *192. 
Linden fruit, #192. 
Linden wood, structure of, *73. 
Linear, App. I, *355. 
Liverworts, 265-272*. 
Living parts of the stem, 76-78. 
Locules, #155. 
.Locust, pinnately compound leaf 
of, *103. 
Locust, thorn-stipules of, 124, #125, 
Luffa, 68. 
Lunularia, 266. 
Lycopodium, *292, 293. 
Maldive nut, 195. 
Malt, 11. 
Maltose, 85. 
Mangrove, 204. 
Maple fruit, *187. 
Maple leaf, 99, 100. 
Marchantia, type study, 266-270*. 
Marsilia, *287. 
Mechanics of monocotyledonous 
stems, 66, 67. 
