Synonyms: Lichen Caninus. Lichen Cinereus Terrestis. Ash-coloured Ground Liverwort.
Common Name :British Lichen or felt lichen, English Liverwort
Habitat :Peltigera Canina grows in Britain where the drainage is good; on mudwalls and molehill
The marginal disks of this lichen are at first veiled and project from the thallus, retaining fragments of the veil of the margin. The fronds are foliaceous, coriaceous, ascending, soft, underside is veined and attached to the ground or to whatever substance it grows upon – where they make handsome plants, especially when in fruit or studded with the little red parasite to which they are subject.
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Upper surface of fresh thallus grey-brown, with convex wrinkles (‘bullate’) (compare P. rufescens), ash-grey and lacking wrinkles when dry, densely but minutely felted-tomentose, lacking isidia, margins of main lobes generally down-turned towards the tips but side-margins often erect, crisped-undulate (beware key in Smith et al. (2009)!), lower surface white-tomentose, with irregular, fluffy, confluently-based rhizines. Widespread but local in turf on dunes and on gravelly and sandy soils inland.
Part Used: Lichen.
Deobstruent, slightly purgative and held in esteem as a remedy for liver complaints.The plant was formerly considered of great value in hydrophobia.
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