458 



INDEX AND GLOSSARY 



Nerium, 419. 



Netted-veined, 95. 



Nettle, 230, 348; acid, 271; cells, 265; 



family, 345. 

 Nettle-tree, 347. 

 Nicotiana, 411, Fig. 550. 

 Nicotin, 271. 



Nightshade, 276, 409; family, 408. 

 Nine-bark fruit, 157. 

 Nitella, 266. 

 Nitrogen, 76, 82, 249. 

 Node: a joint; the space between two 



joints is an internode. 

 Nodules, 78, Figs. 126, 127. 

 Nucleolus, 264. 

 Nucleus, 186, 263. 

 Nut-grass, 244. 

 Nutrient, water as, 76. 

 Nux vomica, 271. 

 Nymphseacese, 361. 



Oak, 14, 93, 233, 271, 286, 287, 343, Figs. 

 500-506; branching, 56; -chestnut 

 graft, 28; expression in, 66; family, 

 342; inflorescence, 121, Fig. 228; mon- 

 oecious, 138; poison, 248, Fig. 423; 

 transpiration in, 70; where grows, 

 207. 



Oakesia, 332. 



Oats, 250, Fig. 426; inflorescence, 121, 

 152, Fig. 191; lodged, Fig. 382; roots, 

 7; seed, 172; starch, 274, 275. 



Oblong, 98, Fig. 149. 



Obovate, 99. 



Obtuse: blunt, (211). 



(Ecology: see ecology. 



(Enothera, 396. 



Offset: a plant arising close to the base 

 of the mother plant, (56). 



Oils, 271, 273. 



Okra, 148. 



Old-hen-and-chickens, 20. 



Old-man vine, 359. 



Oleacese, 420. 



Oleander, 419; leaf, 297. 



Olericulture, 250. 



Olive, family, 420; fruit, 161. 



Onagracese, 397. 



Onion, 4, 271, 276, 277; bulb, 33, 34, 35, 

 Figs. 49-51; cells, 264; germination, 

 178. 



Onoclea, 322. 



Oogonia, 187. 



Oospore, 187. 



Operculum, 198. 



Ophioglossacese, 198. 



Ophioglossum, 198, Fig. 368. 



Opium, poppy, 271. 



Opposite leaves, 47. 



Orange, mock, 62, 395; osage, 48, 108, 

 347, Fig. 510. 



Orbicular, 99, Fig. 153. 



Orchid, 271, 341; epiphytes, 11, 94; fam- 

 ily, 339; flowers, 143, 148, Fig. 250: 

 leaves, 102; roots, Fig. 13; stems, 285. 



Orchidacese, 339. 



Orchis, 341. 



Ornithogalum, 331. 



Osage orange, 48, 108, 347, Fig. 510; 

 phyllotaxy, 48. 



Osier, 4; dogwood, Fig. 5. 



Osmorrhiza, 399. 



Osmosis, 71, Figs. 123, 124. Osmotic 

 pressure, 72. 



Osmunda, 322, Fig. 479. 



Oswego tea, 400. 



Ovary: seed-bearing part of a pistil, 

 (272), Fig. 209. 



Ovate, 99, Fig. 152. 



Overgrowth, 232. 



Oxalic acid, 271. 



Oxalis, 49, 166, 374, Fig. 300. 



Ox-eye daisy, 438, Fig. 189.. 



Oxygen, 76; liberation of, 77, Fig. 130. 



Oyster plant, 434. 



Pseonia, 358. 



Paint-brush, 244. 



Painted cup, 407. 



Palet, 152. 



Palisade cells, 297. 



Palisades of Hudson, Fig. 372. 



Palm, 15, 65, Fig. 113; choked by fig, 

 Fig. 78. 



Palma Christi, 352. 



Palmate, 96, Fig. 140. 



Panicle: branching raceme, (253). 



Panicum, 170. 



Pansy, 370; flower, Fig. 212. 



Papaver, 271, 362. Papaveracese, 362. 



Paper bamboo, forest, Fig. 437. 



Papilionaceous flowers, 146, Fig. 245. 



Pappus: peculiar calyx of composites, 

 (304). 



Paraffin, 303. 



Parallel-veined, 95. 



Paraphyse, 197. 



Parasite, 90, 200, Figs. 131, 136; vs. 

 graft, 22. 



Parenchyma, 266, 278, 297. 



Parnassia, 394. 



Parsley, 121, 399; family, 397. 



Parsnip, 3, 33, 121, 398. 



Parted, 96. 



Partridge-berry, 427. 



Passion flower, 162. 



Pastinaca, 398. 



Pea, 3, 79, 97, 247, 250, 381, Fig. 426; 

 black, 384, Fig. 532; everlasting, 166, 

 381, Fig. 272; experiment in respira- 

 tion, 89; flowers, 146, Fig. 206; germi- 

 nation, 171, 173, 174, 178, Fig. 322; 



