Paraleptochilus decurrens (Blume) Copel. Wild fern from Western Ghats Tamilnadu.

[Ponnutheerthagiri Santhan]

Paraleptochilus decurrens (Blume) Copel.

[J.M. Garg]

Thanks, Santhan ji

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With regards,
J. M. Garg

---------- Forwarded message ---------
From: Ponnutheerthagiri Santhan <ponsa...@gmail.com>
Date: Fri 24 Apr, 2020, 1:40 PM
Subject: [efloraofindia:348775] Paraleptochilus decurrens (Blume) Copel. Wild fern from Western Ghats Tamilnadu.
To: efloraofindia <indian...@googlegroups.com>

Paraleptochilus decurrens (Blume) Copel.

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[J.M. Garg]

Thanks a lot, Chris ji.

---------- Forwarded message ---------
From: Chris Fraser-Jenkins
Date: Fri, 24 Apr 2020 at 15:18
Subject: Re: [efloraofindia:348775] Paraleptochilus decurrens (Blume) Copel. Wild fern from Western Ghats Tamilnadu.
To: J.M. Garg <jmg...@gmail.com>

I thought all would know that Paraleptochilus is a synonym of Leptochilus as it has been published since Sledge (1957) onwards - so Leptochilus, please.  

However this is not L. decurrens (syn. variabilis), a bit narrow in both fronds (though that is variable), and more importantly too smooth with veins hardly visible.  Sedge had a coarse concept when he combined L. lanceolatus within L. decurrens, which we all followed previously.  But there is good evidence (incl. cytological) that lanceolatus is distinct - and is in many ways intermediate between L. decurrens and L. thwaitesianus and I have treated it so in the Annotated Checklist of Indian Pteridophytes vol. 3.  

    In my opinion this can only be either L. lanceolatus or L. thwaitesianus, not decurrens - a bit hard to say which from this photo.   But from its quite large size and the veins partly visible I'd think it more likely to be L. lanceolatus than thwaitesianus.

CRFJ

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With regards,
J.M.Garg

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