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Witch's Hair Lichen (Alectoria sarmentosa)

Alectoria sarmentosa, commonly known as witch's hair lichen, is a fascinating example of a symbiotic relationship in nature. This lichen, despite being classified as a fungus, is actually a partnership between a fungus and a green alga.

Note: The common name "witch's hair" is frequently applied to multiple Alectoria species.

Considerations for Pets

• This lichen hangs from trees.

Taxonomy and Nomenclature

• Scientific Name: Alectoria sarmentosa (Ach.) Ach.
• Common Name: Witch's hair lichen, Common witch's hair
• Family: Alectoriaceae
• Group: Lichen
• Suborder: Lecanorineae
• Synonyms: Mentions Alectoria ochroleuca (Green witch's hair) and Alectoria vancouverensis (Vancouver Witch's Hair Lichen) which are distinct species.
• Symbol: ALSA9 (for Alectoria sarmentosa), ALECT3 (for the genus Alectoria)

Distribution and Habitat

• Frequently found on Douglas fir trees in the Pacific Northwest and on western hemlock near Juneau, Alaska.
• Observed hanging from the branches of vine maples (Acer circinatum).

Morphological Characteristics

• A fruticose (brush-like) lichen, often pendulous (hanging).
• Typically 15-30 cm long.
• Pale green in color. The greenish color comes from the alga.
• Intricately branched.
• Lacks a central strand.
• Does not have soredia.

Ecological Role

• Sensitive species, indicating its susceptibility to environmental changes.
• Arboreal lichens like Alectoria can serve as a browse line for animals.

Quirky Facts

• The text humorously contrasts the common name's association with "hairy old men" with the lichen's true nature.

Further Information

• Encyclopedia of Life: Offers articles about Alectoria sarmentosa.
• Wikipedia: Search for Alectoria sarmentosa.
• U.S. Forest Service: Source for photos of Alectoria sarmentosa.
• Australian Plant Names Index: Offers data links for Alectoria nigricans