Category Archives: What’s that Fern?

Fern ?

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I inherited this fern when I moved house.
It is similar to the Polystichum setiferum that you helped me identify last year. However, it is smaller (~50cm spread) and doesnt have an straight arching upright habit, rather it is flatter to the ground (about 15cm high) and slightly crooked or tangled. can you help ?
thanks

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Irish Fern

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You helped me identify an Irish fern I was given as a Polystichum setiferum. This is another fern I have been given growing wild in the same Irish garden, but a different type. It is larger and hardier. The pinnae are less delicate. It has grown very upright this year from just a root crown to ~90cm.
grateful if you can help identify it for me.

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Costa Rica Fern 2

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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

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Costa Rica Ferns

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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

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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.

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Is this fern a Nephrolepis?

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I found this fern in a local garden centre amongst their “Hardy Ferns”. It was labelled “Varens”, which is I believe Dutch for Fern. The label stated that it is suitable for indoor or outdoor use. I think it may well be Nephrolepis Exaltata ‘Green Lady’ which isn’t suitable for outdoors. What do you think?

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Irish Fern ID Please

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Please can you help me identify this fern.
Given as a present from County Cavan in Ireland.
It is growing now in chalky soil in Hampshire. Still green in January.
The fronds are scally, up to 60cm long and quite hardy, though the pinnae are quite fine & delicate. No sign of any sori on the back.
thanks – Philip

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