14 
ORGANOGRAPHY. 
BOOK I. 
7. Fibres very short, attached to the sides of cells of various 
figures, to which they give a sort of toothed appearance, as inr 
the anther of Phlomis fruticosa and other Labiatae. (Plate I. 
fig. 15.) 
The last three were first noticed by Purkinje. 
8. The fibre twisted spirally, in the open membranous 
tubes that form the elaters of Jungermannia, apparently 
constitutes another form of tissue of this order. (Plate I. 
fig. 17.) 
B. Fibre without Membrane,* 
9. Spiral fibres repressed by mucus, but having sufficient 
elasticity to uncoil when the mucus is dissolved, and then 
breaking up into rings. (Plate I. fig. 16.) These are what 
are found in the seed-coat of Collomia linearis. They approach 
spiral vessels so very nearly, that when I originally discovered 
them I mistook them for such. They are known by their 
roundish or depressed figure when at rest, and by the want 
of an inclosing membrane, and by their brittleness when un- 
coiled. 
10. Fibres short, straight, and radiating, so as to form little 
starlike appearances, found in the lining of the anthers of 
Poly gala Chamaebuxus, &c. by Purkinje. (Plate I. fig. 19.) 
11. Fibres originating in a circle, curving upwards into a 
sort of dome, and uniting at the summit, observed by the 
same anatomist in the anthers of Veronica perfoliata, &c. 
12. Fibres standing in rows, each distinct from its neigh- 
bour, and having its point hooked, so that the whole has some 
* It is not improbable that this form was in the beginning of its growth 
composed of membrane. Mirbel has indeed shown that the curious cells 
which line the anther of the common gourd are continuous membranes till 
just before the expansion of the flower, when they very suddenly enlarge, 
and their sides divide into narrow ribands or threads, curved in almost 
elliptical rings which adhere to the shell of the anther by one end ; these 
rings are placed parallel with each other in each cell, to which they give an 
appearance like that of a little gallery with two rows of pilasters, the 
connecting arches of which remain after the destruction of the roof and 
walls. 
