Calicium glaucellum Ach.
* Account prepared by Dr L. Tibell (Uppsala).
Thallus immersed or rarely episubstratic, dark greyish-green, verrucose, very thin. Apothecia 0.5-0.9 mm high, with a faint greyish pruina at edge of excipulum on lower part of capitulum, or sometimes epruinose, 3-6 times as high as width of stalk. All parts of the apothecium I-. Capitulum obovoid to lenticular, 0.23-0.34 mm diam. Excipulum dark brown to aeruginose, elongated to almost isodiametric sclerotized hyphae, paler in outer part, and ± distinctly anticlinally arranged. Hypothecium dark brown with flat or slightly convex upper surface. Stalk shining, black, epruinose, 0.11-0.17 mm diam., consisting of blackish-brown to dark aeruginose, irregularly interwoven and strongly sclerotized hyphae, becoming pale towards surface. Outermost gelatinous layer I-. Asci cylindrical with uniseriate spores, 35-41 × 3.5-4.5 µm. Ascospores ellipsoid, 9-13 × 5-6.5 µm with irregular ornamentation of short ridges and irregular cracks. Chemistry: No secondary substances identified.
N: South Auckland, Gisborne, Wellington. S: Nelson, Otago, Westland, Southland. Common on decorticated stumps of old trees in rather open situations such as paddocks, or rather open Nothofagus forests, rarely on bark, 150-1100 m.
Cosmopolitan
A species of wide distribution in the Northern Boreal - Temperate Zones of the Northern Hemisphere.
