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Lecanoras on Cotoneaster

Observed: 24th December 2009 By: dw5448
S159 Neighbourhood Nature - course complete
dw5448’s reputation in Fungi and Lichensdw5448’s reputation in Fungi and Lichens
2009 1224river0078

Lighter fruited L. albella (top left) mixed with darker fruited L. chlarotera and very pale L. carpinea.


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.


dw5448's picture

Difficulties with Lecanoras

The Field Studies Council guide and the OPAL guide are quite confusing when it comes to separating these three species - any hints would be appreciated.

gardener's picture

Best way to help separate

Best way to help separate these (and others) is to test for the K and C reactions, details on the BLS website: http://www.thebls.org.uk/content/chemical.html

L. albella: Thallus K+ yellow, C-, discs (apothecia) C-

L. carpinea: Thallus: K+ yellow, C-, discs C+ yellow or orange. Discs +/- white pruinose.

L. chlarotera: Thallus K+ yellow, C-. Discs usually browner in colour than for the other two species.

For most of the crustose species chemical tests are vital to help with IDs - there are so many very similar species that its often not possible to accurately identify them visually.

dw5448's picture

Chem tests

Thanks for the coaching (as usual!)

The Lecanoras are so unbelivably similar that I can finally see that tests are essential if you really need to be accurate. Must go on some proper training, or quit.


gardener's picture

Go for the training - you're

Go for the training - you're starting to get your eye in for lichens so it would be an awful shame if you quit!