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Fern ID - Dimorphic

Perhaps someone here can shed some light on the mystery of this lovely fern I purchased recently. There was no sign with it and though I am pretty good with plant ID, after scouring countless ID sites I just cannot pin it down or come close.

The best I have now is that it is dimorphic (morphologically different sterile and fertile fronds). I provide the following photos as aid. Any help would be hugely appreciated! Thanks guys!


  • LG_LG_ Posts: 4,063
    I can't help, but am intrigued!
    'If you have a garden and a library, you have everything you need.'
    - Cicero
  • DovefromaboveDovefromabove Posts: 82,737
    I grow a few ferns but am
    not an expert. However my first thought is that the ‘broad-fronded’ plant has been produced by vegetative propagation from a parent plant that exhibited the unusual characteristics (ferns are very prone to producing these variations). 
    The fine fronds may be an example of ‘reversion’ as when a variegated holly starts to produce plain green shoots, or may have developed from ‘spores’ from the broad fronds. As it is a ‘sport’ plants from spores will not be the same as the parent plant.  The variation can only be propagated vegetatively. 
    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh

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