Lecania chlorotiza

Description & Identification

This is a crustose lichen with a scurfy-leprose thallus, bright to glaucous green in colour, becoming dirty grey. Apothecia are bright pink-orange to a piebald brown, 0.1-0.3 mm diam., occasional, semi-immersed, rarely becoming sessile.

Photo: P. Diederich

Habitats

On very shaded, base-rich bark and inside old hollow trees, especially elm, ash and willow. Also very old oaks in sheltered wayside and woodland sites and by water.

Distribution

Rare but widespread throughout Britain, also France, Denmark, Norway, Spain.

Records from Wales

Location	Grid Reference	Last Rec'd	Recorder	SSSI
Cards: Coed Cwm Cletwr	SN664919	1991	S.P. Chambers	Yes
Cards: Coed Cwm Cletwr	SN676917	2010	S.P. Chambers	Yes
Cards: Coed Nant Llolwen	SN589772	1993	S.P. Chambers	Yes
Cards: Coed Cwm Einion	SN691947	1994	S.P. Chambers	Yes
Cards: Coed Nant Paith, E of Nanteos	SN630785	1995	S.P. Chambers	No
Cards: Trawsgoed	SN667729	1997	S.P. Chambers	No
Cards: Coed Rhiwbren Fawr	SN473574	2010	S.P. Chambers & A.Seddon	No
Cards: Coedmor NNR	SN194436	1985	A. Orange	Yes
Mers: Coed Dolgoch Falls	SH652043	1992	S.P. Chambers	No

Notes on individual locations

These notes from Steve Chambers:

Coed Cwm Cletwr: With Agonimia allobata on decaying bark of Tilia cordata, alt 60m and On shaded damp bark on NE side of Fraxinus excelsior in gorge E of minor road bend at E end.

Coed Nant Llolwen: On damp Fraxinus excelsior bark at base of tree in stream ravine woodland.

Coed Cwm Einion: On partially decayed spongy bark of old streamside.

Coed Nant Paith, E of Nanteos: On upperside of inclined mossy Quercus trunk

Trawsgoed: On shaded bark on ancient Fraxinus excelsior.

Coed Rhiwbren Fawr: On shaded rough base-rich bark on trunk of old Quercus in sheltered valley woodland.

Coedmor NNR: The earlier name ‘Catillaria chlorotiza’ is pencilled on an otherwise typed list of notable species recorded between 1973-85 assembled by Ray Woods (February 1985). There are no supporting details, i.e. precise locality, phorophyte, or whether voucher material exists. There is a supporting NCC note however (from Alan Orange to Glyn Jones) requesting the species ‘be added to the Coedmor list’, so the record is probably AO’s. [It is listed as such in the new BLS database, but it is not clear what the provenance of the record is - ADH]

Coed Dolgoch Falls: On decaying Fraxinus excelsior bark.

Hectad Distribution in Wales/Link to full BLS map

NBN Taxon Key

NBNSYS0000018312