INDEX 



161 



Hydrodiction, 97. 

 Hydrophytes, 103, 146. 

 Hypocotyl, 2, 3, 4. 

 Hypocotyl arch, 8. 



Inflorescence, 57, 84, 149. 

 Insect-pollination, 48, 56. 

 Internodes, 114. 

 Involucre, 70. 

 Irregular flowers, 65. 



Juniper, 154. 



Keel, 64. 



Labiate, 72. 



Lady slipper, 55. 



Latex, 71. 



Leaflet, 35. 



Leaf mosaics, 37. 



Leaf rosettes, 36. 



Leaf scars, 18. 



Leaf work or functions, 39, 40, 

 41. 



Leaves, 32-45, 138 ; arrangement 

 of, 36 ; compound, 35 ; division 

 of, 35 ; parts of, 32 ; physiol- 

 ogy of, 39-41; modifications of, 

 37 ; simple, 35 ; structure of, 

 139. 



Lenticels, 18. 



Lichens, 128. 



Lily Family, 51. 



Liverworts, 130-134; land, 131, 

 134; water, 1.30. 



Lumber, 28, 151, 157. 



Lycopodium, 145. 



Main axis, 110. 

 Marchantia, l-'U. 

 Marsh Marigold, 56. 

 Megasporangia, 150. 

 Megaspores, 53, 150. 

 Mosopliyll, 34, 149. 

 Micr()i)yle, 1. 

 Microsporangia, 52, 149. 

 Microspores, 52, 149. 

 Midrib, 33, 110, 154. 

 Mildews, 127. 

 Milkweed Family, 70. 

 Mint Family, 73. 



Molds, 119, 121. 

 Monocotyledons, 4, 27. 

 Monodelphous, 64. 

 Monoecious, 50. 

 Morels, 126. 

 Mosaics, leaf, 37. 

 Mosses, 134. 

 Moss-plants, 130-137. 

 Mushrooms, 121-125. 

 Mustard Family, 58. 

 Mycelium, 120. 



Nasturtium, 83. 

 Nitrogen-fixing bacteria, 65. 

 Nodes, 2, 114. 

 Nodules, 99. 

 Nostoc, 95. 

 Nucleus, 94. 



Oogonium, 107, 110, 114. 

 Oosphere, 107. 

 Oospore, 107, 135. 

 Operculum, 136. 

 Oscillatoria, 95. 

 Osmosis, 109. 

 Ovary, 48, 54, 56. 

 Ovules, 48, 53. 



Palisade cells, 34, 149. 



Panicle, 57. 



Parasitic plants, 74. 



Parenchyma, 139. 



Parsnip or par.sley Family, 67. 

 ^^ Family, 64. 

 Hdicel, 48. 



TTeduncle, 51. 



Peristome, 136. 



Petals, 52. 



Petiole, 138. 



Phloem, 139. 



Photosynthesis, 40, 101. 



Physiology, of seeds, 9, 10 ; of 

 seedlings, 9, 10 ; of roots, 12 ; 

 of stems, 31, 32 ; of leaves, 39, 

 40, 41; of flowers, 48, 49; of 

 fruits, 80, 90, 91 ; of algit, 101, 

 103, 108 ; of fungi, 116. 



Pileus, 122. 



Pines, 148. 



I*ine seeds, 4. 



Pistil, 48. 



