kh854's picture

Fern on wasteland and sand dunes

Observed: 11th December 2009 By: kh854
S159 Neighbourhood Nature - current student
kh854’s reputation in Plantskh854’s reputation in Plants
species 12f
Frond spores 2
Frond with spores close up
Frond with spores
Spore close up2
spores close up 3
Spores close up1
Spores close up2
spores close up4
spores close up5
species 12a
species 12b
species 12c
species 12d
species 12e
Description:

Orange-brown spores underneath deeply lobed leaf which grows straight out of ground. Growing on sand dunes and waste land next to them

Identifications
  •  
    Likely ID
    Polypody (Polypodium vulgare)
    Confidence: It might be this.
  • Intermediate Polypody (Polypodium interjectum)
    Confidence: I'm as sure as I can be.
Species interactions

No interactions present.

Comments

Exobasidium's picture

Polypodium

Congratulations on photographing both sides of the frond. It is a Polypodium but I need some fine detail to determine the species. Polypodium interjectum appears to be the most common species in your county.

kh854's picture

Polypodium

Oops my description seems to have been cut off mid sentence.

The leaves grow straight out of the ground and are deeply lobed. They don't appear to be symetrical, but lobes seem to be staggered up the stem.Through a hand leves the margins seem very slightly wobbly or possibly toothed, but not quite smooth.

What details would you need to know to determin the species?

Karen, OU Student

Exobasidium's picture

Polypodium

I would like a close up of the sorus. But Polypodium sp is good enough for the time being.

kh854's picture

Close ups of Sorus

I am afraid I don't have access to a microscope but have added some close up photographs of the sorus. Thanks for all the help.

Karen, OU Student

RMWalls's picture

polypody

To add to the above, it is just possible to see the line of thickened cells with a hand lens. If they are deep, rich brown in contrast to the pale, translucent wall of the sorus the plant is P.vulgare. If they are amber and of a similar tone to the rest of the sorus, it will be P.interjectum. I can't see P.cambricum occurring in this habitat and the plant does not look large enough to be a hybrid.

R M Walls

Norwichnaturalist's picture

I have never found the ssp of

I have never found the ssp of this fern and it seems tolike the seaside. Great Yarmouth North Denes is botanically rich and always a great day out botanising

Colin Jacobs.
Wild Flower Society member
Norwich
Norfolk
vc27
http://www.thewildflowersociety.com/