Fenwickfield's picture

Polypody sp

Observed: 24th March 2011 By: FenwickfieldFenwickfield’s reputation in PlantsFenwickfield’s reputation in PlantsFenwickfield’s reputation in PlantsFenwickfield’s reputation in PlantsFenwickfield’s reputation in Plants
Polypody (3)
Polypody (4)
Polypody
Polypody (2)
Description:

On old mossy hardwood tree,native,common,fronds ranged from 10 to 40cm long,flat and oblong,with lobes more or less equal in size,spores on under surface ripen in July to August

Identifications
Species interactions

No interactions present.

Species with which Polypody (Polypodium sp) interacts

Comments

Chris Metherell's picture

Polypodium spp.

It certainly looks like P. vulgare. However I have learnt through bitter experience (both mine and others) that the only absolutely sure way to be certain of the ID is to look at the sporangia under a microscope. I am told that experts get about 60% success rate just looking at plants in the field. Plants that look for the world like P. vulgare turn out to be P. interjectum and vice versa when under the microscope. One counts the indurated cells in the annulus of a sample of sporangia. A mean of 10-14 confirms P. vulgare, 7-9 confirms P. interjectum.

Chris Metherell
BSBI VC Recorder
North Northumberland

Fenwickfield's picture

Should I

I wonder if I should just put it as Polypodium sp,as I am not able to tell the differance as not that experianced in fern's.

Sheila

Fenwickfield

Chris Metherell's picture

Polypodium spp.

I have just realised that you are in Northumberland! Dooh! If you care to contact me off list - chris@metherell.org.uk - I can pass on details of botanical events hapening in both North and South Northumberland. Including stuff on ferns!

Chris Metherell
BSBI VC Recorder
North Northumberland

Fenwickfield's picture

excellent

That would be great and help on ferns would be very helpful

Sheila

Fenwickfield