Slideshow image
Cetrariella commixta (Nyl.) A. Thell & Kärnefelt (redirected from: Cetraria fahlunensis)
Family: Parmeliaceae
[Cetraria commixta (Nyl.) Th. Fr.,  more]
Cetrariella commixta image
Stephen Sharnoff  
Thompson, J., 1984. American Arctic Lichens: The Macrolichens.
Thallus foliose, forming rosettes on rock surfaces, the lobes narrow, to 2 mm broad, slightly channeled as the previous species; upper side bronzy brown to black brown, shining or dull; underside pale or becoming brown, with scattered black rhizinae. Apothecia at the tips of short lobes, more or less central on the thallus, to 7 mm broad; margin thin, inflexed, irregularly thickened, disk of the same color as the thallus, slightly shining, smooth, concave; epithecium brownish, hypothecium pale; hymenium 45-55 μ; spores 8, hyaline, simple, ellipsoid, 8-10x4.5 μ; spores 8, hyaline, simple, ellipsoid, 8-10 x 4.5 μ; Conidia cylindrical or the center thickest, not the ends, 3-4 x 1 μ.

Reactions: K- , C- , KC- , P-.

Contents: a-collatolic acid.

Growing on rocks and gravel in open dry places, this is a circumpolar, arctic-alpine species, in North America ranging from Labrador to Alaska, south to New York, Colorado, and Washington.

Cetrariella commixta image
Lucy Taylor  
Cetrariella commixta image
Stephen Sharnoff  
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image
Cetrariella commixta image