Help required - Selaginellaceae

[Curtis Clark]

At 05:46 PM 7/27/99 +1200, john steel wrote:
>        Any function for the "ligule" which occurs at the base of
>        the microsporophyll below the sporangia in Selaginella?

The ligule is shared by the major clade that contains the Selaginellopsida
and Isoetopsida (including the Lepidodendrales), and so goes back maybe 400
million years. That puts any consideration of its original adaptive value
effectively out of reach. :-)


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