Calicium robustellum Nyl.
Details
Calicium robustellum Nyl., Ann. Sci. Nat. Bot. sér. 4, 15: 39 (1861)
Calicium robustellum Nyl.
Biostatus
Nomenclature
Nyl.
Nyl.
1861
39
ICN
Calicium robustellum Nyl.
species
Calicium robustellum
Classification
Descriptions
Calicium robustellum Nyl.
Thallus episubstratic, verrucose or rarely almost immersed, straw yellow to greenish-yellow. Apothecia robust, with short stalks, 0.35-0.60 mm high, epruinose, 1.7-2.4 times as high as width of stalk. Surface of mazaedium sometimes with a faint white pruina. All parts of stalk I-. Capitulum obconical, 0.24-0.44 mm diam. Excipulum of short, cylindrical to isodiametric, dark brown, heavily sclerotized cells, interhyphal spaces filled with sclerotic material. Hypothecium blackish brown with slightly convex upper surface. Stalk thick, black, epruinose, 0.16-0.28 mm diam. Central part of stalk of periclinally arranged, dark brown hyphae, c. 3 µm diam., with sclerotized walls but without interhyphal sclerotized material. Outer layer of stalk pale brown to aeruginose or translucid, consisting of anticlinally arranged, branched hyphae with swollen, gelatinous walls but not sclerotized. A thin gelatinous, I-, coat is sometimes found enclosing the stalk. Asci cylindrical, 44-53 × 4.5-5.3 µm, with uniseriate spores. Ascopores ellipsoid, 12.5-15.5 × 6.5-7.5 µm, with minutely warted to areolate ornamentation. Chemistry: Thallus containing arthothelin, thuringione, and thiophanic acid. Thallus K+ dull yellow, C+ orange, KC+ orange to red, Pd-, UV+ dark orange.
Taxonomic concepts
Calicium robustellum Nyl.
Calicium robustellum Nyl.
Calicium robustellum Nyl.
Metadata
5c979711-f5d5-4580-9630-dbde8053abd3
scientific name
Names_Plants
1 January 2000
20 April 2020