T A B . I I.
The column and sexual apparatus of B R A S S I A MACULATA ;
from a drawing by Mr. Bauer made in May 1807. This
plate illustrates the structure of the Tribe called V A N D E J E.
1. 2. Front and side views of the column of an unexpanded flower;
magnified 6 times; these shew the early formation of the gland,
the vertical position of the anther, and the nature of the stigmatic
cavity.
3. 4. Side and front views of the same, the anther being turned back;
and the clinandrium laid bare, to shew that at this period the
gland and the caudicula are separable from the pollen-masses,
which are still enclosed within the cells of the anther.
5. A transverse section of a young anther, shewing the early formation
of the pollen ; magnified 6 times.
6. A front view of an anther after the pollen has dropped, shewing the
membranous valves ; magnified 6 times.
7- A vertical section of the same.
8. 9. Two half profile views of the upper end of the column, having
the gland and the caudicula in a very young state, no adhesion
with the pollen-masses being perceptible; magnified 12 times.
10. A front view of the column of an expanded flower, the anther being
removed, and the pollen-masses, gland and caudicula in their
natural position ; magnified 6 times.
11. 12. Front and side views of the same, with the anther not removed.
13. A side view of the two pollen-masses, their caudicula, and gland;
magnified 12 times.
14. A back view of the same, with one of the pollen-masses removed,
and the other drawn a little off the caudicula and cut across, so as
to shew the hollow centre which communicates with the external
fissure.
15. A side view of No. 10.
16. A front view of No. 13.
17- A back view of the same, shewing the fissures in the pollen-masses.
18. The grains of pollen, cohering in threes or fours; magnified 200 times.
19. The ultimate particles of pollen; magnified 200 times.