376 
INDEX. 
PAGE 
Obcordate 66 
Obtuse 66 
Oil eake . 112 
Oils, fixed 33 
reagents 34 
Oils, volatile 33 
reagents 34 
Oil-secretion cells .... 33, 51 
illustration 333 
Oil-secretion reservoirs . 33, 51 
illustration 333 
Oleo-resins 34 
Olive nut, powder 335 
illustration 300 
Onoclea sensibilis 263 
Ononis spinosa ..... 144 
Opium 240 
Indian 242 
Persian 242 
powder 305 
Turkey 241 
flower (illustration) . . . 357 
Orange peel, bitter .... 202 
peel, sweet 202 
Origin, botanical 101 
commercial 103 
natural 101 
Orris root — illustration . . 329 
powder 310 
Orseille 200 
Orthostichies 70 
Orthotropous 86 
Osmosis 40 
Ourouparia Gambir .... 244 
Ovary 73 
inner morphology .... 89 
tissues . 89 
Ovules 73 
forms 85 
Oxalate of calcium crystals, 25 
illustrations 331 
Oxydase 158 
Oxysantonin ....... 181 
PAGE 
Palisade cells 69, 349 
Panicle 76 
Pansy, petal — illustration . 327 
Papain 35 
Papaver somniferum . . . 240 
Papilionaceous 80 
Papillse 47 
illustrations .... 327, 335 
Parasites (Phanerogams) . 55 
fungi 257 
Pareira 136 
brava 136 
powder 287 
Pea, root, illustrations . 339, 
341, 343 
Parenchyma 41 
chlorophyl 41 
conducting 41 
pseudo- . . . . * . . . 257 
reserve 41, 359 
Parillin 129 
Parted 67 
Paullinia Cupana 124 
Pectase 35 
Pedicel 76 
Peduncle 76 
Peel, bitter orange . . . 202 
lemon 202 
sweet orange 202 
Pelletierine 173 
Pellitory 133 
German 133 
Pellucid-punctate 69 
Pelosine . . 136 
Pennyroyal, American . . 222 
European 223 
Pepo 116 
Pepper, African 195 
black 193 
Cayenne 196 
long 194 
white 194 
Peppermint 223 
