844 GLANDULAR HAIRS, Cuar. XV 
—sessile ones arranged in rows, and others sup- 
ported on moderately long pedicels. Towards the 
narrow summits of the leaves the pedicels are longer 
than elsewhere, and here equal the diameter of the 
leaf. The glands are purplish, much flattened, and 
formed of a single layer of radiating cells, which in 
the larger glands are from forty to fifty in number. 
The pedicels consist of single elongated cells, with 
colourless, extremely delicate walls, marked with the 
finest intersecting spiral lines. Whether these lines 
are the result of contraction from the drying of the 
walls, I do not know, but the whole pedicel was often 
spirally rolled up. These glandular hairs are far more 
simple in structure than the so-called tentacles of the 
preceding genera, and they do not differ essentially 
from those borne by innumerable other plants. The 
flower-peduncles bear similar glands. The most sin- 
gular character about the leaves is that the apex is 
enlarged into a little knob, covered with glands, and 
about a third broader than the adjoining part_of the 
attenuated leaf. In two places dead flies adhered to 
the glands. As no instance is known of unicellular 
structures having any power of movement,* Byblis, 
no doubt, catches insects solely by the aid of its 
viscid secretion. These probably sink down besmeared 
with the secretion and rest on the small sessile glands, 
which, if we may judge by the analogy of Droso- 
phyllum, then pour fourth their secretion and after- 
wards absorb the digested matter. 
Supplementary Observations on the Power of Absorp- 
tion by the Glandular Hairs of other Plants——A few 
observations on this subject may be here conveniently 
introduced. As the glands of many, probably of all, 
* Sachs, ‘Traité de Bot.’ 3rd edit. 1874, p. 1026. 
