Stone cells, of ruellia root, 223 branched, 109 branched, illustrations of, 110 description, in, 112 introduction, 109 occurrence, illustrations, 115 porous and non-striated, 111 porous and non-striated, illustrations of, 114 porous and striated, 109 porous and striated, illustrations of, 113 storage function of, 178 Storage cavities, 176 cavities, illustrations of, 177 cells, 173 cells, cortical parenchyma, 173 cells, illustrations of, 174 cells, pith parenchyma, 173 cells, wood parenchyma, 173 tissue, 173 walls, description of, 179 Stored mucilage and resin, illustrations of, 175 Surrounding cells, arrangement of, 154 Synthetic tissue, introduction, 163 Temporary mounts, 41 Testa cells, 65 epidermal cells, illustrations, 64 Tracheids of pink root, 221 Trailing arbutus leaf, cross-section, illustration of, 266 Tripod magnifier, 4 illustration, 4 Turntable, 46 illustration, 47 Under epidermis of klip buchu leaf, 262 epidermis of mountain laurel, 264 of trailing arbutus, 264 hypodermis of klip buchu leaf, 262 palisade parenchyma of klip buchu leaf, 262 Unicellular clustered hairs, 72 clustered hairs, illustrations, 71 non-glandular hairs, 69 solitary branched hairs, 72 solitary hairs, illustrations, 70 Upper palisade parenchyma of klip buchu leaf, 260 palisade parenchyma of mountain laurel, 264 Vacuoles, 53 Vascular bundles, arrangement of, 292 occurrence of, 292 Vessels, annular, 127 and tracheids, introduction, 126 in cross-section of quassia wood, 254 in radial-section of quassia wood, 254 in tangential-section of quassia wood, 258 of ruellia rhizome, 226 of ruellia root, 223 of ruellia stem, 237 of spigelia rhizome, 226 pitted, 131 pitted with bordered pores, 131 reticulate, 131 sclariform, 128 spiral, 127 Water pores, aerating function of, 151 Watchmaker’s loupe, 4 illustration, 4 Wood fibres, color of, 104 illustrations, 105 in cross-section of quassia wood, 254 in radial-section of quassia wood, 258 in tangential-section of quassia wood, 258 introduction, 104 structure of, 104 Wood parenchyma, conduction by, 150 in cross-section of quassia wood, 254 in radial-section of quassia wood, 258 of pink root, 221 of ruellia rhizome, 227 of ruellia root, 223 of ruellia stem, 237 of spigelia rhizome, 226 of spigelia stem, 235 Woods, description of, 254 diagnostic structures of, 258 Woody stems, buchu stem, description of, 242 mature buchu stem, 242 Xylem, of pink root, 221 of ruellia rhizome, 226 of ruellia root, 223 of ruellia stem, 237 of spigelia rhizome, 226 of spigelia stem, 235 Transcriber’s Notes