INDEX 305 
Under epidermis 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 moun- 
tain 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, erating 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, descrip- 
tion 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 
