skyesteve's picture

F5

Observed: 11th May 2013 By: skyesteveskyesteve’s reputation in Plantsskyesteve’s reputation in Plantsskyesteve’s reputation in Plantsskyesteve’s reputation in Plants
F5
Description:
Identifications
Species interactions

No interactions present.

Comments

cicuta58's picture

Angle

Doesn't the angle at the base of the pinnules, which is far more than 90 degrees, rule out aculeatum?

cicuta58

lavateraguy's picture

On the other hand ...

... don't the singly pinnate fronds rule out setiferum?

(I would argue that the angle at the base of the pinnules here is not homologous to the angle usually used in distinguishing aculeatum and setiferum, and that it is necessary to be cautious in using it.)

lavateraguy's picture

For what it's worth ...

... Polystichum setiferum is only known from a single site in Skye (near Portree).

cicuta58's picture

Maturity

This clearly demonstrates the problems in trying to ID immature ferns!

cicuta58

lavateraguy's picture

I was never particularly convinced that it was holly fern

but having looked round images on the web, it doesn't look like any of the hybrids, and there are some similar plants labelled as aculeatum. On grounds of morphology and distribution I think that on balance it is aculeatum.

Alison Jean Evans's picture

Not holly fern

I agree that this is a young P aculeatum. We often go out monitoring P lonchitis on the limestone pavements, and the most usual cause of confusion is with young P aculeatum