P late XIX.
Kg. 1. A flower-bud, its bracteae and perianthium being removed, to show the column with the
two annular processes at its base. Natural size.
2. A portion (about one flfth) of the column, of which part of the limb is removed, to show
the cavities of the neck, into which the antherse are received. Natural size.
3. The portion of the limb removed from fig. 2, with its antherse immersed in their proper
cavities. Natural size.
4. An anthera, magnified three diameters, as are figures 5, 6,7 and 8.
5. A transverse section of the same, above the middle.
6. A transverse section of the same, below the middle.
7. 8. Vertical sections of the same.
9. Pollen, magnified 200 diameters.
P late XX.
Kg. 1. A vertical section of part of the base of the smaller flower-bud, showing the vessels of
the root, some of which appear to penetrate the substance of the parasite. Natural
size.
2, 3. Portions of the column of the expanded flower, nearly corresponding with those of the
bud in Plate XIX, figs. 2 and 3. Natural size.
4. Anthera of expanded flower, magnified 3 diameters, as are figures 5 and 6.
5. Transverse section of the same, below the middle.
6. Vertical section of the same.
7. Pollen of the expanded flower, magnified 200 diameters.
8. A transverse section of the root, magnified 3 diameters.
PLATES XXI—XXIX.
(From the * Linnean Transactions/ vol. xix.)
PLATES XXI—XXV.
Structure of R afflesia Arnoldi—See Vol. I, p. 419.
Plate XXI.
Kg. 1. A female, flower-bud, with the roots of the Vitis (or Cissus) vertically divided, which shows
the numerous irregular cavities of the ovarium chiefly if not entirely above the insertion
of bracteae and calyx, and the vascular lines continued from the walls of the cavities
through the upper solid part of the column into the axes of the style-like processes.
Natural size.
2. A female flower-bud in the same stage of development, the bracteae and calyx entirely
removed, to show its outward resemblance to the male flower-bud (figured in PI. XIX).
Natural size.
Plate XXII.
Fig. 1. A small segment of the column, of which part of the elevated undivided limb is removed,
to show the narrow furrows of the sides of the column corresponding in number with
the rudiments of antherae, seen in
2, which is the portion of the limb removed from fig. 1. Natural size.
3. The upper half of one of the styles of the disc, with its terminating hairs. Magnified
10 diameters.
4. A portion of fig. 3, somewhat more highly magnified (20 diameters), vertically divided.
5, 6, 7. Some of the hairs still more highly magnified, which, according to Mr. Bauer, have
a secreting surface seen in fig. 7, and which in figs. 5 and 6 is covered with the secretion,
consisting of spherical particles enveloped in mucus at fig. 8. Magnified 100 diameters
(but see observations respecting them in page 405-6).
9, 10. Longitudinal and transverse sections of a style. Magnified 50 diameters.
11. A transverse section of half the ovarium, to show the numerous irregularly ramified
cavities, and the arrangement of vascular cords belonging to the bracteae and calyx.
Natural size.
12. A small portion of the ovarium, with the ovula covering the surface of the cavities, and
the vascular lines passing through the axes of the parietes. Magnified 20 diameters.
13—18. Ovula in various stages (the earliest observed are not represented). Magnified
100 diameters.
P late XXIII.
Fig. 1. A ripe pericarpium, of the natural size, the calyx, bracteae and apex of the column being
deciduous.
2. The same divided vertically, and showing the thickness of the densely fleshy and deeply
furrowed covering, and also that the whole of the ovarial cavity is above the insertion of
bracteae and calyx.
Plate XXIV.
Kg. 1. A small portion of the wall of two adjoining cavities, the surfaces covered with numerous
seeds, all of equal size. Magnified 20 diameters.
2. A seed with its funiculus, of which the lower erect portion is filiform, the recurved upper
half being of the same texture, colour, and surface with the seed, which it somewhat
exceeds in thickness. Magnified 100 diameters.
3. The same divided longitudinally, to show the structure of the seed (according to Mr.
Bauer), and that the enlarged apex of the funiculus is solid. Magnified 100 diameters.
4. The nucleus of the seed taken out of its thick nut-like outer covering. Magnified
100 diameters.
5. The same nucleus, whose membranous coat is separated by pressure, to show the
albumen. Magnified 100 diameters.
6. The denuded loosely-cellular albumen.