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Gyalecta friesii Flotow ex Korber
Family: Gyalectaceae
Gyalecta friesii image
Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus crustose, smooth to granular-powdery, dull, pale gray-grccn to olive-gray; reactions negative. Apothecia to 4 mm broad; margin incurved, sometimes higher than disk, usually covered by thalloid tissue; exciple radiate, outer layer yellow-brown, hyaline within; disk flat to concave, orange-whitish to orange-red, darker than margin; hypothecium pale yellowish. I-; hymenium 80-105 μm, hyaline or pale yellowish; paraphyscs 1.5-2 μm, not branched, septate, tips to 3 μm; asci cylindrical; spores uniseriate, elongate spindle-shaped. 3-septate (8—) 14-22 x 2.5-4.5 μm.

This specics grows on wood, moss, and over granitic rocks. It is boreal alpine in Europe but is rarely collected. The North American range is uncertain. As it occurs in Newfoundland and western Greenland, it should be expected in the Northwest Territories or Labrador. A specimen from Robb Lake, in northern British Columbia (Brodo 22.189), is in CANL.