INDEX. 
441 
Nepeta, 297 
Nettle, 99 
Nettle Family, 99 
New Jersey Tea, 227 
Nicotiana, 304 
Nigger-head ( Rudbeckia ) 
Night-shade, 302 
Night-shade, Enchanter’s, 248 
Night-shade Family, 300 
Nine-bark, 179 
Nodding Violet, 234 
Nolina, 85 
Nothocalais, 406 
Notholccna, 4 
Nut-grass, 58 
Nut Pines, 8 
Nymphcea, 147 
Nymphzeaceze, 147 
Oak, 97 
Oak, Poison, 225 
Oat-grass, 23, 34 
Oat-grass, Wild, 35 
Oats, 34 
Oats, False, 33 
Oats, Wild, 23 
Odostemon, 148 
CEnothera, 244-247 
Oleace^e, 264 
Oleales, 264 
Oleaster Family, 239 
Oligoneuron, 349 
Olive Family, 264 
Omphalodes, 286 
Onagra, 244 
One-flowered Wintergreen, 258 
Onion, 81 
Onion Family, 81 
Onobrychis, 216 
Onosmodium, 293 
Oonopsis, 344 
Ophioglossace^e, 1 
Ophioglossales, 1 
Ophrys, 89 
Opulaster, 179 
Opuntia, 238 
Opuntiales, 234 
Orache, 116 
Orchard-grass, 40 
Orchidace^e, 87 
Orchidales, 87 
Orchid Family, 87 
Orchid, Bog, 88 
Orchid, Long-bracted, 87 
Oregon Grapes, 148 
Oreobatus, 180 
Oreobroma, 126 
Oreocarya, 286 
Oreochrysum, 345 
Oreoxis, 252 
Orobanchace^e, 319 
Orobanche, 320 
Orogenia, 254 
Orophaca, 211 
Orpine, 170 
Orpine Family, 169 
Orpine, Red, 170 
Orthocarpus, 317 
Oryze^e, 22 
Oryzopsis, 25 
Osmorrhiza, 2$i 
OxALIDACEjE, 220 
Oxalis, 220 
Ox-eye, 371 
Ox-eye Daisy, 382 
Oxybaphus, 124 
Oxypolls, 254 
Oxyria, 109 
Oxytenia, 328 
Oxytrope, 212 
Oxytropis, 212 
Oyster Plant, 403 
Ozomelis, 172 
Pachylophus, 245 
Pachystima, 226 
Painter’s Brush, 314 
Painted Cup, 314 
Pandanales, 11 
Panice^e, 20 
Panic-grass, 21 
Panicularia, 48 
Panicum, 21 
Papaver, 148 
Papaverace^e, 148 
Papaverales, 148 
Papyrus, 58 
Parietaria, 99 
Parnassia, 175 
Parnassiace^e, 175 
Paronychia, 121 
Parosela, 214 
Parsley-Fern, 3 
Parsnip, 255 
Parsnip, Meadow, 252 
Parthenice, 371 
Parthenocissus, 228 
Pasque Flower, 140 
Pastinaca, 255 
Pea, Marsh, 217 
Pea, Turkey, 254 
Pea Family, 194 
Pearly Everlasting, 370 
Pearl-wort, 130 
Pectiantia, 171 
Pectis, 382 
Pedicularis, 318 
Pellcua, 3, 4 
Pellitory, 99 
Penny-grass, 152 
