GLANDULAR HAIRS, 245 
cell of which contains a secretion, must likewise be classed here. 
These glandular hairs are either trichome formations (epidermal 
glands, glandular hairs, tufts, scales, compare Figs. 129 éd, 154, 
96), and as such have already been treated of, or they are pro- 
duced by the protuberances of cells of the inner tissue, which 
border on intercellular spaces (root-stock of Aspidium Filiz 
mas). 
Fic, 162,—From the fundamental tissue of the underground stem of Aspidium Filix 
A,—Intercellular space from the younger tissue, in the middle showing a gland, 
ith’a | xudation. t 
seen from above and covered with’a green & se 
B.—Longitudinal section through awall-cell (m), of the intercell 
which the gland (g) begins to grow as a protuberance. : : 
C.—Longitudinal section through the mother-cell (m) filled with starch, from.whieh 
the gland, which is borne upon a stalk, projects as a daughter-cell into the ck cae 
lar space. The daughter-cell has permitted ‘its green contents to appear upon 
surface (as already represented from above, in A). : i 
D.—A single gland more highly magnified, and freed from its covering, with the ex 
_ ception of a delicate film (cc), by boiling with alcohol (Schacht), 
