SECRETION IN THE HYPERICACER, 453 
are separated from each other by considerable distances. Some 
stems have a rhomboidal outline in cross section. In these a 
passage is present in each angle of the rhomboid. Longitudinal 
sections show that they are placed parallel to the long axis of the 
stem, and that they do not anastomose. Besides these in the 
cortex there are others in the pith, irregular both as to number 
and position, which have a direction parallel to those in the 
cortex. In the fruits, on the other hand, they are not so regu- 
larly disposed. In the thicker-walled ovaries, as those of H. caly- 
cinum, instead of one row seen in a transverse section, there 
are several, the exterior ones being generally the older; in the 
thinner-walled fruits, as those of H. perforatum, there is but one 
row. Where many rows are present they are most numerous 
near the outer wall, fewer near the inner one, while the inter- 
mediate space is nearly free from them. Unlike the passages of 
the stems, these are not arranged in straight lines, but are 
curved irregularly and anastomose with each other frequently. 
Similar passages are found in the sepals and some of the petals of 
H. calycinum. The peduncles are supplied exactly as the stems, 
but the roots do not contain them. 
In a third category are included all the dark spots, dots, or 
patches met with on the leaves, both floral and foliage, of many 
species. Though of very frequent occurrence, they are not so 
universally present as are the two former kinds. On the leaves 
of H. perforatum, in particular, they are disposed more or less 
regularly round the extreme edge, though there are others irre- 
gularly scattered over the lamina. In H. hirsutum the sepals are 
coarsely sinuate in their contour, and between the sinuses there 
are well-marked pointed teeth. The apex of each such tooth 
contains one of these glands, and, as the teeth are very small, at 
first sight each seems to resemble a glandular hair. On the petals 
also in this species are from four- to six-stalked projections, 
which are situated close together at the summit; these contain 
glands resembling those of the sepals. In H. perforatum dark 
patches of very irregular contour are found on the petals, 
generally elongated in the direction of the fibrovascular bundles. 
Though not always so dark in colour as the glands in the leaves 
and sepals, they have the same structure, and hence belong to 
this section. Similar structures occur in the petals of other 
species. 
The fourth kind of secreting-organ is much less generally 
