Ginny B's picture

Dog Lichen

Observed: 26th May 2012 By: Ginny B
S159 Neighbourhood Nature - course complete
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Dog Lichen
Dog Lichen
Dog Lichen
P1030085_Dog lichen
Description:
Identifications

Caution: Do NOT use iSpot to identify fungi to eat!

Some fungi are very poisonous so a mistaken ID could have serious consequences.

Species interactions

No interactions present.

Comments

Ginny B's picture

Dog lichens (Peltigera spp)

Thanks for the better ID. I missed the best opportunity of a good photo about a month ago. What would I look for to tell the difference between Peltigera canina and P membranacea, please?

synan's picture

Peltigera

Hi Ginny,

I haven't yet found P. canina, but the most immediate difference is in the rhizines, which are long, dagger-like and separate in P. membranacea, exactly as in your second photo, but shorter, bushy and confluent at the base in P. canina.

See http://www.ispot.org.uk/node/227810

A more subtle difference is in the veins on the underside, which are supposed to be more flattened in P. canina.

P. canina is typically found on dry, sandy soils, whereas P. membranacea is much more common and often found on grass, moss and tree trunks.

Of course, there are other Peltigera spp. to be aware of too. Dobson (2011) does a good job of summarising the important characters.

Nigel

Ginny B's picture

Peltigera

Thanks Nigel.

Now to go back and have another look and see if I can get a better photo of it. Unfortunately I've only got a small pocket type digital camera that doesn't do close-ups that well.

Ginny

Ginny B's picture

Another pic added

After many attempts to get a clearer picture of the rhizines, still not a very good pic though, sorry!

I think this shows them a bit clearer - long, dagger-like and separate.

Ginny