Chalkie's picture

Dryopteris fern - but which one?

Observed: 27th May 2011 By: ChalkieChalkie’s reputation in PlantsChalkie’s reputation in PlantsChalkie’s reputation in PlantsChalkie’s reputation in Plants
27.5.11 ferns Lighthorne Rough 006 with scale
27.5.11 ferns Lighthorne Rough 006 with scale 1
27.5.11 ferns Lighthorne Rough 006 with scale 1 2
27.5.11 ferns Lighthorne Rough 006 with scale 1 2 3
Description:

I have tried three books and the internet, but still I'm not sure what this is. Thanks if you can help.

Identifications
Species interactions

No interactions present.

Species with which Broad Buckler-fern (Dryopteris dilatata) interacts

Comments

Tim Rich's picture

not aemula which has upturned

not aemula which has upturned crinkly pinnae. Might be carthusiana but would like to see close-ups of the scales on the stem so see if they are concolourous or have a dark stripe

Tim Rich

Chalkie's picture

No dark stripe

They are the colour and shape of the scales in the picture in Rose for carthusiana (I don't think my camera would record them well enough!)
Appreciate you looking. Thanks.
Not having seen aemula, I'm not too clear what 'upturned crinkly' pinna really means - they are twisted up towards the apex (but crinkly doesn't sound right).

Tim Rich's picture

when you see the bright green

when you see the bright green 'crinkly' fronds of aemula you'll know what I mean - the pinnae are not flat like the other buckler ferns.

Tim Rich

Chalkie's picture

thanks for helpful comments

I have since seen what I was told (by an apparently knowledgeable botanist) was D carthusiana in another wood - one distinctive feature being that the fronds were not all growing from one point like dilatata, and have then seen what I believed was the same thing again in another wood. But now, having read Alan S's comments, I think I'll have to go back again. Relying on the dark stripe did seem a bit too easy. And I hadn't looked at crosses - it shouldn't be allowed! Still, I'm not giving up yet.