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Alectoria imshaugii
closeup shows "isidia-like" spinules
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Lecanorales
Family:	Parmeliaceae
Genus:	Alectoria
Species:	A. imshaugii
Binomial name
Alectoria imshaugii Brodo & D.Hawksw. (1977)

Alectoria imshaugii, commonly known as spiny witches hair, is a species of fruticose lichen in the family Parmeliaceae that occurs in North America. It was described as a new species by the lichenologists Irwin Brodo and David L. Hawksworth in their 1977 monograph on the genus Alectoria. The species epithet honors Henry Andrew Imshaug. The variety venezuelensis, proposed in 1994, occurs in Venezuela.

The Chinese species Alectoria spiculatosa is somewhat similar in appearance to A. imshaugii, but is distinguished by its characteristic sorediate pseudocyphellae and also by having spinules that grow over soralia.

References

1. Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. New Haven: Yale University Press. p. 152. ISBN 978-0-300-08249-4.
2. Brodo, I.M.; Hawksworth, D.L. (1977). Alectoria and allied genera in North America. Opera Botanica. Vol. 42. p. 59.
3. Marcano, V.; Morales, A. (1994). "El género Alectoria Ach. (Ascomicetes liquenizados) en Los Andes de Venezuela". Ernstia (in Spanish). 4 (3–4): 89–100.
4. Wang, L.S.; Liu, D.; Shi, H.X.; Zhang, Y.Y.; Ye, X.; Chen, X.L.; Wang, X.Y. (2015). "Alectoria spinosa, a new lichen species from Hengduan Mountains, China". Mycosphere. 6 (2): 159–164. doi:10.5943/mycosphere/6/2/6.

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