Plate X.
Yol.
Coiysaathera fimbriata, S. Sr. . . . • . 1 .
Azolla piunata, S. Sr. . ■ ■ . ib.
Fig. 1. Plant of the natural size.
2. ,, magnified.
3. Leaves, magnified.
4. Male involucrum, containing two flowers, magnified.
5. „ empty.
6. Two male flowers.
7. A male flower divided longitudinally.
8. „ deprived of its Calyptra, 9.
10. Lower cell of a male flower.
11 and 12. Different views of the contents of the upper cell.
13. Longitudinal section of the upper cell.
14. Inner female involucrum.
15. Capsules, with their footstalks arising from the base of the involucrum.
16. A capsule more highly magnified.
] 7 j opened transversely to show the position of the seeds.
18. „ .. empty.
19. Seeds.
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86
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PLATE XI.
(From the ‘ linnean Transactions ,* vol. x.) See Vol. I, p. 355.
Pig. 1. Dawsonia polytrichoides. a. Mascula planta magnitudine natnrali. b. Discus masc. auctus.
c. Ejusdem flos unicus. d. Idem absque folio perigoniali, magisque auctus. e. Anthera
et filum succulentum maxime aucta. ƒ. Peminese plantae, magn. nat. g. Yaginula cum
foliis perichsetialibus auctus. h. Capsula cum calyptra exteriori. i. Pili calyptrae exte-
rioris magis aucti. j . Capsula cum operculo et calyptra interiori. k, l. Capsula deoper-
culata cum peristomio. m. Capsulae sectio ejusdem figuram insertionemque ciliarum
ostendens, o. Calyptra interior, p. Operculum cum columellae processu filiforrai.
q. Columella ciliis suis terminata. r. Semina, s. Ciliae peristomii auctae.
2. Leptostomum inclinans, magnitudine natnrali. a. Ejusdem capsula aucta cum mem-
brana annulari. . Operculum, y. Idem a basi visum cum annulo cobaerente.
PLATE XII.
(From the * Linnean Transactions' vol. xii.) See Vol. I, p. 366.
Fig. A. A branch of the panicle of Leontice thalictroides, Linn. (Caulophyttum thalictroides,
Michaux), of the natural size.
B. The same magnified, to show at 1, the early rupture of the ovarium, the ovula as yet but
little enlarged and only in part protruded: at 2, the same parts in a more advanced
state; one seed being nearly ripe, supported by its elongated and thickened umbilical
cord; a second ovulum considerably increased in size, but abortive; and the remains
of the ruptured ovarium somewhat enlarged.
C D. Two longitudinal sections of the nearly ripe seed; exhibiting the vascular cord continued
from the axis of the funiculus umbilicalis to the apex of the seed j the remarkable
process of the inner integument at the umbilicus (of which another view is given
separately at F ) ; and the unripe embryo nearly in contact with this process, and as
yet undivided.
PLATES X III—XX.
(From the eLinnean Transactions' vol. xiii.) See Vol. I, p. 397.
Structure op Rafplesia Arnoldi.
Plate XIII.
The expanded flower reduced to somewhat less than one third of its natural size; the scale given
on the plate being too long by nearly one seventh.
P late XIV.
A flower-bud covered with its bractese, of the natural size.
Plate XV.
The underside of the same b u d ; to show the root, the reticulate base with the circular elevation
in which it terminates, and the origin of the outer bractese. Natural size.
Plate XVI.
A flower-bud, of which the bractese, whose insertions are shown, are removed. Natural size.
P late XVII.
A different view of the bud in the same state, to show the aestivation and veins of the segments
of the perianthium. Natural size.
Plate XVIII.
Fig. 1. A vertical section of the bud deprived of its bractese: exhibiting the principal vessels of
the column and perianthium, and the structure of the root, especially the change in the
direction, increased ramification and termination of its vessels at the base of the parasite.
Natural size.
2. One half of the vertically-divided perianthium of the same bud, in which the internal
surface of the tube, corona, and segments is shown. Natural size.