398 INDEX 
Myriothamnaceae, 369 Nitric acid, 139 
Myriotrichiaceae, 337 Nolanaceae, 366 ¥ 
Myristicaceae, 361 Nostoc, 165, 331 
Myrsinaceae, 365 Nostocaceae, 165, 331 
Myrtaceae, 369 Nucleus, 1 
Myrtales, 369 Number of plants, 157 
Myrtles, 369 Numerical data, 327 ; 
Myrtus, 370 Nutation, 123 
Myxobacteriaceae, 331 Nutrition, 71 
Myxophyceae, 163, 330 Nutritive tissues, 65 
Myzodendraceae, 371 Nux vomica, 150 
Nyctaginaceae, 365 
N Nymphaea, 364 
Nymphaeaceae, 364 
Naiadaceae, 358 Nyssa, 372 
Names of plants, 159 | 
Narcissus, 360 O 
Nastic movements, 128 
Natural Selection, 113 Oak, 310 
Navicula, 334 Oat Grasses, 359 . 
Naviculaceae, 334 Smut, 237 
Naviculales, 334 Ochnaceae, 363 
Neckera, 351 Octaviana, 344 
Neckeraceae, 351 Odors of flowers, 322 
Nectar of flowers, 322 Oedogoniaceae, 174, 333 
Nectria, 343 Oedogonium, 174, 333 
Nectrioidaceae, 347 Oedopodiaceae, 350 
Nelumbaceae, 361 Oenothera, 309, 370 | 
Nelumbo, 361 Oenotheraceae, 370 | 
Nemalion, 207, 338 Oidium, 348 | 
Nemalionales, 338 Oils, 14 | 
Nemastomaceae, 338 Olacaceae, 371 
Nematocaceae, 351 Old Calamites, 264, 353 
Nepenthaceae, 362 : -fashioned Ferns, 257, 352 
Nepeta, 367 Pines, 278, 356 
Nephrodium, 353 Olea, 366 
Nereocystis, 201, 337 Oleaceae, 366 
Nerium, 367 Oleic acid, 143 
Netted-veined, 301 Olein, 143 
Nettles, 362 Oliniaceae, 371 
New Cells, formation of, 19 Olives, 366 | 
Nicotiana, 306, 366 Olpidium, 332 . 
Nicotine, 150 Onion, 320 
Nidularia, 345 Onoclea, 259 
Nidulariaceae, 345 Onygenaceae, 34.. 
Nidulariales, 228, 345 Oogones, 174 
Nightshades, 366 Oospora, 348 
Nigredo, 347 Opegrapha, 342 
Nitella, 194, 336 Open bundlés, 59 
Nitellaceae, 194, 336 Operculum, 252 
Nitophyllum, 209, 339 Ophioglossaceae, 352 
