Index. 



433 



Mounting sections, 383. 



Movements, causes of, 120; spontaneous, 



129. 

 Mucor mucedo, 27T, 278; reproduction of, 



277. 



Mucor stolonifer, 277. 

 Multan, maximum temperature at, 312. 

 Multiplication, 17. 

 Myosotis palustris, 173. 

 Myosurus, 231. 

 Myriophyllum, 79, 305. 

 Myxomycete, 252 ; formation of spores of, 



253. 



Naias flexilis, 218. 



Nasturtium, 181. 



Nectar, 180, 181 ; allurement by, 180 ; glands, 



143 ; receptacle, 180. 

 Nelumbo, 140. 

 Nelumbo lutea, 324 ; dispersion of seeds of, 



216. 



Nemastylis, 227. 

 Nematophyton, 352. 

 Nepenthes, 142, 143. 



Nitrogen, how obtained by plants, 38, 39, 260. 

 Nodes, 66. 

 Nucellus, 165. 

 Nucleus, 105 ; functions of, 106 ; as bearer of 



inheritable qualities, 168. 

 Nymphaea odorata, 204. 



Oak, Cretaceous, 355; reserve materials in 



cotyledons of, 27. 

 (Edogonium, 163, 164, 166, 264. 

 (Enothera Missouriensis, 330 ; laciniata, 330 ; 



rhombipetala, 330 ; speciosa, 247. 

 Onion, preparing root tips of, 100. 

 Oogonium, 163, 274. 

 Operculum, 291. 

 Orange, 208. 

 Orchidaceae, 228. 



Orchids, cross pollination of, 190 ; roots of, 41. 

 Order, 361. 



Organs of the cell, 105. 

 Osage orange, 135. 

 Osmosis, 37. 



Osmotic pressure, 60, 61. 

 Ovary, 165. 

 Ovule, 165. 



Oxalis, 148, 207 ; stricta, 238 ; violacea, 238. 

 Oxidation a vital process, 132. 

 Oxygen, evolution of, 91 ; necessity of, in 



germination of seeds, 15, 21. 



Palisade cells, 88. 



Palm, 111; Cretaceous, 355; stem of, 59; 

 Sabal, 339 ; trees, 335. 



Pappus, 156. 



Paraffin, imbedding in, 386; oven, how to 



make simple, 386; sections, cutting and 



mounting, 383. 

 Parasitic plants, roots of, 40. 

 Parmelia colpodes, 284. 

 Parmentiera cereifera, 337. 

 Pencils, colored, use of, 3 ; how to sharpen, 2. 

 Perennials, 132. 

 Pericycle, 49 ; function of, 51. 

 Perigynous, 204, 205, 206. 

 Permian plants, 354. 

 Petal, 164. 

 Petunia, 184. 

 Phloem, diagram to show, 58, 91 ; function 



of, 51. 



Phloroglucin, 387. 



Photosynthesis, 92 ; essential nature of, 132. 

 Pine, 177, 208; pistillate inflorescence of, 



178 ; staminate catkin of, 177. 

 Pines, 339. 

 Pistil, 165, 203 ; compound, 204 ; half inferior, 



204 ; inferior, 205 ; simple, 203 ; superior, 



204. 



Pistillate, 175. 

 Pitcher plants, 142. 

 Pith, 49; elder, inclosing objects in, 377; 



function of, 51. 

 Plant forms, diversity of, 136. 

 Plants, antiquity of, 351; classification of, 



359 ; Carboniferous, 352 ; Cretaceous, 355 ; 



Devonian, 352; Jurassic, 355; of past 



ages, 351 ; Permian, 354 ; Tertiary, 356. 

 Plasma membrane, 105 ; function of, 105. 

 Plasmodium, streaming of protoplasm in, 



104. 



Plastids, 106. 



Pleurococcus, 264, 284 ; viridis, 270. 

 Pliny, 171. 



Plum, 135, 207 ; diagram of flower of, 206. 

 Plumule, 7. 

 Poison ivy, 138. 



Pollen, allurement by, 180 ; of pine, 177. 

 Pollen grain, 165. 

 Pollen tube, 165, 167, 169. 

 Pollinium, 190, 192, 197. 

 Poplar, 177. 



Poplars, Cretaceous, 355. 

 Poppy, 180. 



Populus monilifera, 213, 230. 

 Portulacca, 322. 

 Potato, 73, 136,139. 

 Preparing materials for herbarium, 368. 

 Prickly ash, 135. 



Primary cortex, 49 ; function of, 50. 

 Primitive physical conditions, 351, 

 Primula, 176. 



