INDEX, 
Polypody, 203 
Polyporus, 179 
Polytrichum, 192 
Pond-scum, 11, 124 (figs.) 
Pond-scums, 122 
Pond-weeds, 248 
Pontederiacex, 244 
Poplars, 254, 276 
Poppies, 276 
Poppyworts, 263 
Pore-fungi, 179 
Portulacacez, 262 
Potato, 278 
Potato, 277 (fig.) 
Potato-mildew, 140 
Potato-mildew, 140, 141 (figs.) 
Prickles, 68 
Prickly Fungi, 179 
Primary Meristem, 29 
Primrose, hairs, 37 (fig.) 
Primroses, 258, 276 
Primulacee, 258 
Primulale Cohort, 258 
Procambium, 49 
Proteacese, 256 
Proteads, 256 
Protein Matter, 11 
Proterandry, 237 
Proterogyny, 237 
Prothallium, 195 
Protococcus, 113 
Protonema, 191 
Protophyta, 105 
Protophytes, 105 
Protoplasm, 1 
Protoplasmic Activity, 2 
Prunus, flower, 265 (fig.) 
Pteridophyta, 194 
Pteridopliytes, 194 
Pteris, 203 
Pleris, tissue, 24, 48, 206 (figs.) 
Puccinia, 169 
Puccinia, 170, 171 (figs.) 
Puff-balls, 175, 176 
Pumpkins, 278 : 
Pumpkin stem, sieve-tissue, 21 
+) 
Punstam vegetationis, 31 
Purslanes, 262 
Pyrenomycetes, 163 
289 
QuassrAps, 261 
Quillworts, 210 
Quinic Acid, 83 
Quinine, 278 
RapiaLt BunDues, 49 
Radicle, 252 
Radishes, 278 
Ranale Cohort, 263 
Ranunculacee, 263 
Rapateacer, 244 
Raspberries, 278 
Red Rust, 172 
Red Seaweeds, 151 
Red-snow Plant, 113 
Redwoods, 224 
Regions of Vegetation, 100 
Resedacez, 263 
Resedads, 263 
Restiacex, 248 
Reserve Material, storing of, 81 
Reserve Material, use of, 82 
Resin-canals, 58 
Resting Spore. 115, 130 
Reticulated Veins, 200 
Reticulated Vessels, 23 
Rhamnacee, 261 
Rhamnads, 261 
Rhizoids, 183 
Rhizocarpee, 205 
Rhizophoracee, 260 
Rhododendrons, 276 
Rhubarb crystals, 12 (fig.) 
Ricciacee, 187 
Rice, 250 
Ricinus, embryo, 252 (fig.) 
Ringed Vessels, 23 
Ringless Ferns, 203 
Rivularia, 113 
Rock-roses, 263 
Rockweeds, 143 
Rockweeds, 144, 145, 146 (figs.) 
Root, 60, 63 
Root-hairs, 37, 63 
Root-pressure, 75 
Root-stocks, 62 
Rosacex, 260 
Rosale Cohort, 260 
Roses, 276 
Roseworts, 260 
Roxburghiacee, 244 
