INDEX. 



247 



Nettle. See " Urticinss." 



Nicotiana. See " Tobacco." 



Night-blooming cereus, 204. 



Nightshade, 215; Fig. 119. 



ffitella, 40. 



Nitellese, 40. 



Node, 39. 



Nucleus, 7, 31, 231. 



Nuclear division, 7, 31, 231; Figs. 127, 



128. 



Nucleolus, 7, 231. 

 Nutmeg, 188. 

 Nyctayinese, 183. 

 Nymphaea, 189 ; Fig. 101. 

 Nymphseacese, 190. 



Oak, 183, 225 ; Fig. 97. 

 (Edogonium, 26-28 ; Fig. 16. 



reproduction, 27. 



fertilization, 28. 



resting spores, 28. 



(Enothera. See " Evening primrose." 

 Oil-channel, 202. 

 OleacesB. See " Olive." 

 Oleander, 219. 

 Olive, 218. 

 Onagracese, 206. 

 Onoclea, 104; Fig. 70. 

 Oogonium, 27, 36, 39, 45, 59, 62. 

 Oophyte, 109. 



Opium opium poppy, 191. 

 OphioylossesB. See "Adder-tongue." 

 Ophioglossum, 116. 

 Opuntia. See " Prickly pear." 

 Opuntiess, 203. 

 Orange, 198. 



Orchid, 164, 166, 227; Figs. 89, 90. 

 OrchidesB, 164. 

 Orchis, 227; Fig. 89. 

 Organic bodies, 1. 

 Origanum oil, 234. 

 Oscillaria, 15, 16; Fig. 6. 



movements, 15. 



color, 16. 



structure and reproduction, 16. 



Osmunda. See " Flowering-fern." 

 Ostrich-fern, 104-109. 



germination of spores, 104. 



prothallium, 104, 105. 



archegonium, 105, 106. 



antheridium and spermatozoids, 

 106. 



fertilization, 107. 



embryo and young plant, 107, 108. 



comparison with sporogonium of 



bryophytes, 109. 

 Ovary, 129, 148, 156, 202. 

 Ovule, 129, 131, 144, 148, 151, 179. 

 Oxalis. See " Wood-sorrel." 

 Oxydendrum, 211; Fig. 116. 

 Oxygen, 2, 95. 



Palea, 161. 



Palisade parenchyma, 178. 



Palm, 157. 



date, 159. 



coco, 159. 



Palmss. See "Palm." 

 Palmate, 171. 

 Palmetto, 159. 

 Pandanex, 159. 

 Papaveracese. See "Poppy." 

 Papaw, 186 ; Fig. 100. 

 PapilionacesB, 208. 

 Pappus, 223. 

 Papyrus, 161. 

 Paranucleus, 231. 

 Parasite, 54. 



Parenchyma. See " Soft tissue." 

 Parmelia, 73, 75 ; Fig. 44. 

 Partridge-berry, 223, 228. 

 Passiflora. See " Passion-flower." 

 Passiflormse, 205. 

 Passion-flower, 204; Fig. 112. 

 Pea, 207, 208; Fig. 115. 

 Peach, 206. 

 Pear, 206. 



Pediastrum, 23 ; Fig. 11. 

 Pelargonium, 197. 

 Peltate, 190. 



