Costa Rica Fern 2

Elaphoglossum-eximium-2-1.jpg Elaphoglossum-eximium-1-0.jpg

My dementia meant that I was gettig in a bit o a mddle so I do not know if either of my first mailing attempts got through.

My wife and I recently had the privilege of visiting Sri Lanka a country which we have wanted to get to for many years and indeed this trip was originally booked for 2020. In the meantime I have been diagnosed with early stage Vascular Dementia / Vascular Parkinsonism. When I was 21 I set myself a target to photograph 25,000 species of identified living organisms in my lifetime. I am up to 23,600 but I am now 73 and hope that I can still achieve my objective. (The total includes 461 species of Pteridophytes).
I only managed to photograph three fern species in Costa Rica. (Most of the ferns that I saw were not fertile or only had very immature sori)

I would be very grateful if anyone might possibly be able to suggest a species identification of these three species. (I have been a member of BPS for many years).

Many thanks
Alan Outen
3. ? Elaphoglossum eximium Arenal Hanging Bridges, Arenal National Park,, Costa Rica, 21.05.22

Costa Rica Ferns

Adiantum-sp.-Costa-Rica.jpg

My wife and I recently had the privilege of visiting Sri Lanka a country which we have wanted to get to for many years and indeed this trip was originally booked for 2020. In the meantime I have been diagnosed with early stage Vascular Dementia / Vascular Parkinsonism. In addition I have severe psoriatic arthritis which is increasingly limiting my mobility. When I was 21 I set myself a target to photograph 25,000 species of identified living organisms in my lifetime. I am up to 23,600 but I am now 73 and hope that I can still achieve my objective. (The total includes 461 species of Pteridophytes).
I only managed to photograph three fern species in Costa Rica. (Most of the ferns that I saw were not fertile or only had very immature sori. This was the case with the Adiantum but nonetheless I hope it may be recognisable)

I would be very grateful if anyone might possibly be able to suggest a species identification of these three species. (I have been a member of BPS for many years).

Many thanks
Alan Outen

1. Adiantum sp ? – Villa Lapas, Puntarenas Prov, Costa Rica, 16.05.22

Polystrichum spp.

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I recently found this fern on the Nature Reserve I work on in Lincolnshire. I have identified it as Hard Shield Fern (Polystichum aculeatum) which appears to be localised within the county and indeed would be a first for the Reserve. However, being fairly new to pteridophytes I stand to be corrected and would appreciate a second opinion.
Many thanks.

Ophioglossum vulgatum v O. azoricum

Ashley Basil and I have been looking at Ophioglossums in the New Forest with GPS locations provided by Alison Bolton

It is dificult to tell these small ferns apart and it seems that small O. vulgatum can look like O. azoricum
There are some useful pictures in the The illustrated field guide to ferns and allied plants of the British isles by Jermy, C. & Camus, J. on pages 21-23
I think it is instructive in order to identify these plants to dig them up and look at the structures below the ground
It seems to be fairly true that O. azoricum does come up in pairs whereas O. vulgatum does not