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Megaspora verrucosa (Ach.) Hafellner & V. Wirth
Family: Megasporaceae
[Amygdalaria verrucosa (Ach.) Körb.,  more]
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Stephen Sharnoff  
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus crustose, olive-green to whitish green, partly slightly pruinose, continuous to areolate to strongly verrucose-warty, lacking soredia or isidia; hypothallus indistinct. Apothecia immersed in areolae, appearing like Pertusaria; disk black, concave deeply, at first ostiolate, becoming broader, with a thin darkening border around ostiole within thalloid margin; hypothecium pale yellowish or brownish; epithecium K—, HC1—, HN03—; hymenium hyaline, inspersed at times, 1+ blue; paraphysoids slender, 1.5 µm, branched but not anastomosing, lax, tips only slightly thickened, not much darkened; asci clavate; spores 8, biseriate, thin-walled, wall single, ellipsoid, often containing oil drops, walls K—, 30-65 X 16-36 µm.

Reactions: K—, C—, KC—, P—.

Contents: unknown.

This species grows on moss, humus, and soil in the Arctic but also on tree trunks toward the southern edge of the range. It is circumpolar arctic-alpine; and boreal, and also occurs in the Andes in South America. In North America it ranges south to North Carolina, Minnesota, New Mexico, and California.

Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Substrate and ecology: var. verrucosa on humus and litter, or soil or bryophytes; especially on calcareous substrates, including limestone, but also over volcanic and other siliceous rocks; mostly subalpine to alpine, World distribution: Europe, Macaronesia, Asia, South America, and North America Sonoran distribution: not currently known but in adjacent Rocky Mountain states.
Megaspora verrucosa image
Stephen Sharnoff  
Megaspora verrucosa image
Stephen Sharnoff  
Megaspora verrucosa image
Stephen Sharnoff  
Megaspora verrucosa image
Stephen Sharnoff  
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Stephen Sharnoff  
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