Any idea as to fern species

Found this growing at Glendurgan Gardens, Cornwall.
Approx. 1m tall.

Green, sterile fronds, underside.

Note different fronds. Pale and dark brown.

Dark brown immature fronds appear to develop into steriles.


TIA
Fof

 

I'm quite curious. It reminds me of the Blechnum genus, but I haven't found a good match. Perhaps e-mail the gardens?

 

To id ferns from pics is hard.
Gardens such as Glendurgan often have very rare and unusual plants not seen elsewhere.
It may well be Blechnum sp.

Blechnum - Wikipedia

Pic 3 and 4. I believe the brown narrow ones you describe as sterile are infact the fruiting fertile part of the fern.

"fertile fronds, which are green at first, but when they have scattered their spores, etc "

 

Thanks guys
I have since ID'd it as a possible Blechnum, but hit a brick wall at that point.
I will drop in again shortly and see if definative fertiles, with sori, are showing.

 

IF i understand Blechnum correctly the main fronds are infertile and never have sori.

The different structures are the fertile parts and as such do not have any sori.

Sori are like a seed capsule that release the dust which creates new baby ferns.
Blechnum just release the dust but do not have sori.
I think????

 

Hi Silver
At the moment, I am leaning towards Blechnum discolor.
It appears that the last image I posted, might actually show a fertile frond.
Image (Blechnum discolor - The University of Auckland) shows both sterile and fertile fronds

Definately need to go and have another gander.

 

FERNS ARE HARD TO ID!!!!
Which is why I rarely attempt id of ferns....I am too stupid!

This is what I was trying to describe in earlier posts..obviously not very well!

"Pic 3 and 4. I believe the brown narrow ones you describe as sterile are infact the fruiting fertile part of the fern."
................................

"IF i understand Blechnum correctly the main fronds are infertile and never have sori.

The different structures are the fertile parts and as such do not have any sori.

Sori are like a seed capsule that release the dust which creates new baby ferns.
Blechnum just release the dust but do not have sori.
I think????"
.....................................................


All Blechnum do this ..it is impossible to say if it is Blechnum discolor or another Blechnum sp!

Quote wiki.Blechnum is one of 18 genera in the subfamily Blechnoideae, and has about 30 species.

You should never jump to conclusions with no understanding.
Please go back and ask the head gardener. (Not one of the volunteers)

 

Hi Silver surfer
Some miscommunication, I fear.
I was not disagreeing with you. Exactly the opposite.
I included the image from University of Auckland, to augment your statements. I only came across it as I was searching for Blechnum sori, as I had read somewhere that they were, if I recall correctly, described as "scale like". I couldn't find the reference, though.
I am not IDing it as B. discolor, just leaning in that direction.
I have emailed the head gardener, and will advise as to his response, as, when and if.

 

Sorry misunderstood.
Thought you thought it was Blechnum discolor.
Keep us all posted.
I have sent similar e mails...normally head gardeners are most helpful.
Ever day is a school day.

 

Just heard back from Tom, the head gardener.
He has ID'd it as B. discolor.
For once I appear to have been leaning in the right direction, rather than falling on my face.

 

Good to get a positive id!