DR. M. T. MASTERS ON THE PASSIFLORACEA. 645 
1l. In addition to the parts shown in fig. 10, the 5 stamen-tubercles are here seen opposite the sepals. 
lla. Young anthers from 11. 
12. Longitudinal section through a po of a flower further developed than 11, and ee the three 
carpellary tubercles. 
13. Gynæcium from a flower more advanced than 12, The styles remain separate, but the bases of the 
carpels are inseparate. 
14. One petal with the stamens, their filaments now obvious. 
15. Portion of a flower more advanced than 14. At the base of the petal may be seen the corona just 
appearing, also the commencement of the receptacular tube and of the gynophore. 
16. Section through the pistil of 15, enlarged, showing the origin of the ovules as little conical or sub- 
globular tubercles from the wall' of the pistil. 
17. Portion of the same flower as 15, showing the corona, 
18. All the parts of the flower are apparent in this section. 
19. Pass.racemosa. Portion of the placenta from a young bud, showing the progressive development 
of the ovules. à 
20. Separate ovules, showing nucleus, secundine and primine ; curvature taking place. 
21. Top view of ovule. ! 
22. Pass. alba. Ovule fully formed. At the apex of the funicle is a little expansion, which is the be- 
ginning of the arillus. 
23, 24. Further stages in the development of the arillus. 
25. Arillus laid open. 
26. Pass. fetida. Ripe seed. 
27. Pass. alba. Primine partially cut away to show the secundine marked with pits, 
28. Fragment of an ovule showing at a the primine turned on one side; at b the inner surface of the 
secundine next the nucleus, and marked with conical projections corresponding to the pits on the 
outer surface; c, cut edge of the secundine. 
PLATE LXV. 
1. Female flower of Modecca tamnifolia. A portion of the tube of the flower is removed to show the 
position of the staminodes (much enlarged). ; 
2. Section lengthwise through the middle of the flower: a, gynophore; 5, inner staminode; c, outer 
staminode; d, petal; e, sepal ; f, corona. 
3. Diagram showing the arrangement of the parts; the letters refer to the same organs as in the pre- 
re. 
4. e ama Section through the flower, and intended to show the manner in which the 
stamens curve over and deposit the pollen among and upon the inner threads of the corona: 
a, bract; 5, sepal; c, petal; d, outer thick threads of the corona; e, stamen, beneath which are 
the inner fine threads of the corona; f, the honey-secreting portion of the flower-tube. 
5. Top view of a portion of the flower of Passiflora cincinnata, showing the stamens bent down so as to 
come into contact with the inner threads of the corona. (Figures 1-5 drawn by Mr. Worthington 
Smith, F.L.S.) 
6. Portion of the stem of Passiflora quadrangularis, magnified 200 diam. (see text). 
7. Pass. punctata, Epidermis and gland of leaf (ocellum) , raphides, &c. (see text). 
8. P. quadrangularis. Section of en. showing the arrangement of the vascular bundles, x 25 
(see text). 
9. Section across midrib, x 25 (sns text). 
4 10. Section through thread-like tip of the filament, x 250, 
VOL. . xxvir 
