350 





INDEX AND GLOSSARY 



Nicotin, 246. 



Nightshade, 330. 



Nine-bark fruit, 151. 



Nitella, 235. 



Nitrogen, 72, 249. 



Node : a joint ; the space between two 



joints is an internode. 

 Nuelear-plate, 239. 

 Nucleolus, 234, 239. 

 Nucleus, 233, 248. 

 Nux vomica, 246. 

 Oak, 15, 117, 147,299, Fig. 212; branching, 



54 ; expression, 61 ; monoecious, 133 ; 



transpiration in, 82; where grows, 198; 



kinds 299, 300. 

 Oats lodged, Fig. 355; starch, 249. 

 Oblong, 94. 

 Obovate, 94. 

 Obtuse: blunt, (199). 

 (Ecology; see ecology. 

 Offset: a plant arising close to the base 



of the mother plant, (56). 

 Oils, 246, 247. 

 Okra, 140. 

 Oleander leaf, 269. 

 Olive tree, Fig. 100. 



Onion bulb, 33, 35, Figs. 45, 46; germina- 

 tion, 171; sugar, 246. 

 Onoclea, 285, Fig. 310. 

 Oogonia, 180. 

 Oospore, 180. 

 Operculum, 191. 

 Ophioglossum, 191, Fig. 341. 

 Opium, 246. 



Orange, mock, 323; Osage, 303, Fig. 451. 

 Orbicular, 94. 

 Orchard, 63, 206, 214, 217. 

 Orchid flowers, 140, Fig. 225; rocts, 90; 



stems, 259; epiphytes, 88. 

 Osage orange, 49, 105, 303, Fig. 451. 

 Osmosis, 66, Figs. 106-108. 

 Osmunda, 285, Figs. 418, 419. 

 Ovary : seed-bearing part of a pistil, 

 Ovate, 94. [(256>. 



Overgrowth, 224. 

 Oxalic acid, 246. 

 Oxalis, 50, 158, 314, Fig. 273. 

 Ox-eye daisy, 115, 337, Fig. 169. 

 Oxygen, 72; liberation of, 77, Figs. Ill, 112. 

 Palet, 146. 

 Palisade cells, 269. 

 Palisades of Hudson, Fig. 345. 



Palm, 60, 259, Fig. 98. 



Palmate, 91. 



Panicle: branching raceme, (240). 



Panicum capillare, 163. 



Pansy flower, Fig. 196. 



Papaver somniferum, 246. 



Papilionaceous flowers, 138. 



Pappus : peculiar calyx of composites, 



Parallel-veined, 91. [(282). 



Paraphyse, 190. 



Parasite, 85, 200; vs. graft, 22. 



Parenchyma, 236, 252. 



Parsley, 117, 326. 



Parsnip, 3, 117, 325. 



Parted, 92. 



Parts of flower, 122. 



Passion flower, 127. 



Pastinaca sativa, 325. 



Pasturing, 223. 



Patches, 19, 23. 



Pea, 3; black, 319, Fig. 473 ; Everlasting, 

 317, Fig. 246; garden, 317, Figs. 190, 

 284; stock, 319, Fig. 473; sweet, 317, 

 Fig. 222; flowers, 138, Fig. 222; fruit, 

 Fig. 246; germination, 166, 171, Fig. 284; 

 legume, 151; tendril, 110. 



Peach, 321, Fig. 476 ; phyllotaxy, 49; and 

 nectarine, 229; biid,37, 40; crystals, 250 ; 

 fruit, 153; inclusions, 249. 



Pear, 323, Figs. 63, 101, 102, 182, 266 ; 

 phyllotaxy, 49; sclerenchyma,257; -apple 

 graft, 28 ; bud, 36, 40, Figs. 52, 57, 58, 

 61-63,66; fruit, 155, Fig. 266; -hawthorn 

 graft, 28 ; inflorescence, 108, Fig. 182; 

 leaf-scar, 37; -quince graft, 28; thorns, 

 104; tree, 15; form of, 63, Figs. 101, 102. 



Peat, 202. [(247). 



Pedicel: stem of one flower in a cluster, 



Peduncle: stem of a flower-cluster or of 

 a solitary flower, (247). 



Pelargonium hortoruni, 314, Fig. 183. 



Peltate: attached to its stalk inside the 

 margin, (197), Figs. 126, 135. 



Pentamerous : in 5's, (271). 



Peony fruit, 151. 



Pepo: fruit of pivmpkin, squash, etc., 



Pepper-grass, 312. [(298). 



Pepper, red, 330, Fig. 488. 



Peppermint, 327. 



Perennial: of three or more seasons' du- 

 ration, (10). [pistils, (257). 



Perfect flower: having both stamens and 







