| Lycopods: Seleginella |
Although this Selaginella doesn't look much different from some of the mosees
or leafyl iverworts, you can see the true leaves are
thicker. They are considered microphylls are there is only 1 vein per leaf.
The 3 images below were taken from the slide of a newly developed
Seleginella  |
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Spore Production: In Seleginella we see the evolution of heterospory, with
the production of both megaspores and microspores....remember the
production of 2 spore types permits different gametophytes, lowers probability
of self -fertilzation and eventually in the gymnosperm lines, the ability
of the' female' gametophyte to be retained on the
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Cross section of the Sporophyte Plant
Note the stele in the center containing the red stained xylem and the smaller
celled phloem surrounding it.
