[Home] [Up]
| |
Fig.
7.2-5. Longitudinal section of club moss (Lycopodium).
Fig. 7.2-3 shows that club moss has narrow tracheary elements with annular
secondary walls; it also has narrow tracheids with scalariform pitting. Because
the tracheids are so narrow, the scalariform pit apertures cannot be really
wide, so these do not have the striking ladder-like appearance of the wide
tracheids in Fig. 7.2-4.
|