Dolichousnea longissima
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Dolichousnea longissima, commonly known by the names old man's beard or Methuselah's beard lichen, is a fruticose lichen in the family Parmeliaceae.
Lichen Dolichousnea longissima IMG 4844
Growing on a conifer in the hills north of Mount St. Helens, showing the leaf-like side-branches and pendent "stems", some of them several metres long
Ludwig Schaerer
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Ludwig Emanuel Schaerer was a Swiss pastor and lichenologist. Interested in natural history from a young age, Schaerer trained as a teacher and studied theology in Bern. During his career as a teacher
Dolichousnea longissima
…Synonyms Parmelia coralloidea var. longissima (Ach.) Spreng. (1827) Parmelia longissima (Ach.) Spreng. (1827) Usnea barbata var. longissima (Ach.) Schaer. (1850) Usnea longissima Ach. (1810) Growing on a conifer in the hills north of Mount St. Helens, showing the leaf-like side-branches and pendent "stems…
Front cover of 1840 work
Dried specimens
Buellia schaereri 37885
Placocarpus schaereri Jymm