24 BOTANICAL GAZETTE’ [JULY 
Fic. 15. Surface view of the apex of an older sporocarp, showing the : 
fate of the apical cell. X 4oo. 
Fic. 16. Part of a section of the tip of a young sporocarp, which cuts the 
segment on the right parallel to the upper and lower segment-walls and the 
segment on the left perpendicular to these. X 400. 
Fic. 17. Part of a transverse section of a young sporocarp. X 400. 
Fic. 18. Similar section of slightly older sporocarp. X 400. 
Fic. 19. Part of transverse section of a capsule showing ultimate margi- 
nal cell. X 400. 
PLATE I. 
FiG. 20. Transverse section of stalk of sporocarp. X 400. 
Fr, 21, Similar section of an older stalk. x 300. 
_ FiG, 22. Transverse section of a capsule older than that shown in figure 
Ig. X 400, 
Fig, 23. Similar section slightly older than the last. X 400. 
Fic. 24. The same still older, though lower sori. X 400. : 
Fic. 25. Approximately horizontal section through upper pair of sori of 
a capsule considerably older than that shown in figure 31. X 200. 
Fig. 26. Part of similar section slightly older, showing formation of spo- 
rangia. X 400, 
1G. 27. Part of a section transverse to the sori of a capsule of the age 
shown in figure 31, near the ventral surface, 400. 
Fig. 28. Similar section of right upper sorus a little older. X 400. 
FiG. 29. Similar section near the middle of left upper sorus still older. 
veces 
Fic. 30. Similar section, near the base of lower right hand sorus, older 
than last. x 175. 
PLATE Il, i 
Fig. 31. Approximately Sagittal section of a young sporocarp, just at the 
right of the median plane. x 400 
FiG. 32. A similar section of a much older sporocarp. X 200, 
FiG. 33. Nearly median sagittal section of a mature sporocarp. X 30 — 
(At 7d, in dotted lines, the vascular bundles which would be seen ina section - 
a little farther from the median plane than this.) 
Fic. 34. Horizontal section through pit and base of mature capsule, just | 
dorsal to slit in basal wall, x 17%, 
FIG. 35. Section parallel to last through slit in basal wall. x 175. 
Fig. 36. View from the ventral side of the 
mature capsule. x 15, 
plane.) | 
Fig. 37. View from above of 
capsule and its branches. x.1 5. 
1G. 38. View from above of the bundles at the top of the capsule. X 15 
vascular bundle system of the 
(The arrow indicates the direction of the median ; 
the transverse bundle at the base of the 
