Tree lungwort

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Related to Tree lungwort: Lung lichen
a lichen (Sticta pulmonacea) growing on trees and rocks. The thallus is lacunose, and in appearance somewhat resembles the lungs, for diseases of which it was once thought a remedy.

See also: Lungwort

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Fungi, such as tree lungwort, has been found to contain properties that could fight the human form of "mad cow disease".
Mae'r llwybr yn dilyn ochr yr afon ag mewn dim o dro, roeddwn i'n gweld llabed yr ysgyfaint, y tree lungwort.