Lichens recorded at the Woodland Education Centre, Offwell, Devon, England.

Species List for The Woodland Education Centre, Offwell
Recorded by Barbara Benfield, Devon Lichen Recorder

The species list records 107 different species of lichens which have been observed growing at the Woodland Education Centre in Offwell, near Honiton, Devon, England. It is not a complete species list, but represents the number of species found in two days of searching, one day in 1998 and another in 2006. Forty seven species were recorded in both surveys; thirty seven species were found only in 1998; twenty three species only in 2006. These differences are not necessarily indicative of major changes in habitat. They may simply be as a result of the surveys having looked in slightly different areas of the Centre. The list includes seven species which are indicative of old woodland sites.

There are likely to be many more lichens as yet unrecorded at the Centre due to the great variety of restored habitats within the Centre. These include several different types of woodland, wetlands and emergent heath. Many lichens are very small and unobtrusive, requiring a hand lens for observation. A single mature oak tree may provide a substrate for up to 30 different species of lichen. Therefore omitting a single tree could make a significant difference to the number of species recorded.

Genus	Species	1998	2006	Remarks
Acrocordia	gemmata	X		Mature hardwoods
Anisomeridium	nyssaginium= polypori	X		On elder in damp places
Arthonia	cinnabarina	X		On hazel in damp sheltered situations
	didyma	X	X	On sheltered hazel and oak
	elegans	X	X	On hazel
	radiata	X		Common on branches of many trees and shrubs
	spadicea	X	X	On shaded bark in damp woods
	*vinosa*	X		Confined to old woodlands. On oak on a bank to the north of the entrance gate
Bacidia	biatorina	X		On mature trees. Mainly oak in established woodlands
	viridifarinosa	X		On shaded bark of deciduous trees
Baeomyces	rufus	X	X	On acid soil beside the track. Common
Buellia	griseovirens	X		Occasional on branches
Candelariella	reflexa	X		Frequent
	vitellina	X		Common
Chrysothrix	candalaris		X
	flavovirens		X
Cladonia	chlorophaea	X	X	A common lichen. Plentiful by the leat
	coniocrea	X	X	Common on banks and at the base of trees. On humus.
	digitata	X		Occasional. Beside the leat.
	macilenta	X	X	Common on banks
	polydactyla	X	X	Common by the leat
	portentosa	X		Common on acid heaths in Devon but rare at Offwell
	pyxidaca		X
	ramulosa	X		Common by the leat
	squamosa	X	X	Occasional by the leat
	subulata	X	X	By the leat. Occasional in Devon.
Cliostomum	griffithii	X		Common.
Collema	tenax var. ceranoides		X
*Dimerella*	*lutea*	X	X	In humid established woods. On oak on a bank near the entrance gate.
	pineti		X
Enterographa	crassa	X	X	Common on shaded bark.
Evernia	prunastri	X	X	Common.
Fuscidea	lightfootii		X
Graphina	ruizana	X		Occasional on coppiced trees.
Graphis	elegans	X	X	Frequent in woods.
	scripta	X	X	Common.
Gyalidiopsis	anastomosans	X	X	Often on gorse. On a tree stump at Offwell.
Hypocenomyce	scalaris	X		An acid loving lichen. Generally on pine or lignum, but on Rhododendron at Offwell.
Hypogymnia	physodes		X
Lecanactis	abietina	X	X	On the dry sides of old trees.
Lecanora	barkmaniana		X
	chlarotera	X	X	Common.
	confusa	X		Common on branches.
	dispersa	X		Common on twigs,
	expallens	X	X	Common.
	jamesii		X
Lecidella	elaeochroma	X	X	Common.
Lepraria	incana	X	X	Common. On a conifer at Offwell.
	lobificans	X	X	Frequent on hardwoods.
	sp.		X
Lucidea	doliiformis		X	Nationally scarce species, on pine.
Micarea	bauschiana	X		On Rhododendron at Offwell. Generally on stones and roots in banks.
	lignaria	X		On tree stumps and dead logs.
	peliocarpa		X
	prasina	X	X	Common on acid bark and dead stumps.
Mycoblastis	caesius		X
	sterilis = fucatus	X	X	On acid bark, especially birch.
Normandina	pulchella	X	X	On mossy trees.
Opegrapha	atra	X		Common.
	corticola	X		Frequent on oak and chestnut.
	soridiata		X
	vulgata	X	X	Frequent
*Pachyphiale*	*carneola*		X	Old woodland.
Parmelia	caperata	X	X	Common.
	confusa		X
	fuliginosa glab.		X
	perlata	X	X	Common.
	reddenda	X		An occasional lichen. Not common at Offwell.
	revoluta	X	X	Common. (Fertile in 2006)
	saxatilis	X	X	Common on acid bark. (Fertile in 2006)
	subaurifera	X		Common.
	subrudecta	X	X	Common.
	sulcata		X
Peltigera	lactucifolia	X		Frequent in damp undisturbed places. Only on willows at Offwell.
Pertusaria	albescens	X		Not common at Offwell.
	amara	X	X	Common.
	hemisphaerica	X		Frequent.
	hymenia	X	X	Common.
	leioplaca	X		Occasional on smooth bark.
	pertusa	X	X	Common.
Pheaographis	dendritica	X	X	Common in woods.
	*lyellii*	X	X	Uncommon. An old woodland lichen.
Phlyctis	argena	X	X	Common.
Physcia	tenella	X	X	Common on nutrient enriched twigs.
Platismatia	glauca	X	X	An acid bark lichen. Not common at Offwell.
Porina	aenea		X
	*leptalea*	X	X	An uncommon lichen of trees in boggy sites. At Offwell it is growing on willow by the stream near the Cabin.
Pyrrhospora	quernia	X		On old beech.
Ramalina	farinacea		X
	quercicola		X
Schismatomma	cretaceum	X		In an underhang of an old chestnut.
	declorans	X		Common on the dry sides of old trees.
	*quercicola*		X	Old woodland.
Scoliciosporum	pruinatum		X
Stenocybe	septata	X		A lichen specific to old holly.
*Thelotrema*	*lepadinum*	X	X	An old woodland species. Common at Offwell.
Trapelia	coarctata	X		On stones in the track.
Trapeliopsis	flexuosa	X	X	Common on lignum and posts.
	granulosa	X	X	On soil and stumps. Common.
	pseudogranulosa	X	X	On soil of banks and stumps.
Usnea	articulata	X	X	A south-western clean air lichen. Occasional at Offwell.
	ceratina	X	X	A clean air lichen. Occasional at Offwell.
	cornuta	X	X	Common.
	florida	X		A rapidly declining lichen. Occasional at Offwell.
	rubicunda	X		Occasional.
Verrucaria	hydrela	X		On stones in the stream.
Xanthoria	parietina	X		Rare at Offwell. Very common on trees in farmland.
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