Chaenotheca stemonea (Ach.) Müll.Arg.
Details
Chaenotheca stemonea (Ach.) Müll.Arg., Mém. Soc. Phys. Genève 16: 360 (1862)
Chaenotheca stemonea (Ach.) Müll.Arg.
Biostatus
Nomenclature
Müll.Arg.
Ach.
(Ach.) Müll.Arg.
1862
360
ICN
species
Chaenotheca stemonea
Classification
Synonyms
Descriptions
Chaenotheca stemonea (Ach.) Müll.Arg.
Thallus thin, farinaceous, consisting of a thin algal layer loosely entangled by mycobiont hyphae, glaucous green. Photobiont: . Apothecia short to medium-sized, 0.8-1.4 mm high, 11-19 times as high as width of stalk. Stalk 0.06-0.10 mm diam., in upper part whitish to dull brownish, in lower part dark brown to black. Capitulum spherical, with poorly-developed excipulum. The excipulum forms an inconspicuous collar at the base of the capitulum and is not visible from above. The brownish tinge of the lower side of the capitulum is caused by spores entangled in a loose hyphal web, that covers the lower side of the excipulum. This hyphal web also renders the excipulum a pale colour. Hypothecium with strongly convex upper surface. Asci cylindrical or irregular, with uniseriate or in part biseriate spores, 9-14 × 1.6-2.7 µm. Asci formed in chains. Ascospores spherical, 3.5-4.9 µm diam., smooth though a few irregular cracks also occur. Chemistry: The thallus contains two unidentified aromatic aldehydes giving a Pd+ yellow to reddish reaction. Thallus otherwise K-, C-, KC-.
Taxonomic concepts
Calicium stemonem Ach.
Chaenotheca stemonea (Ach.) Müll.Arg.
Chaenotheca stemonea (Ach.) Müll.Arg.
Chaenotheca stemonea (Ach.) Müll.Arg.
Chaenotheca stemonea (Ach.) Müll.Arg.
Metadata
355a3227-aeca-4ccd-af94-009a574b1c53
scientific name
Names_Plants
1 January 2000
20 April 2020