Early Plants

Characteristics

Psilotum

Lycopodium

Selaginella

Ancient Lycopods

Equisetum

Ferns

II. Selaginella:

Unlike Lycopodium, Selaginella is:

heterosporous - microsporophylls producing microspores, and megasporophylls producing only megaspores.

The vegetative structure (left) may look familiar- it grows in our local woods..

Below note the mega and microsporophylls contained on the strobilus

:

 

 

 The lifecycle shown below is a bit more, but not much more complicated, than those seen earlier.

 

 

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