Slideshow image
Chaenotheca chrysocephala (Turner ex Ach.) Th. Fr. (redirected from: Coniocybe gracilescens)
Family: Coniocybaceae
[Calicium chrysocephalum (Turner) Ach.,  more]
Chaenotheca chrysocephala image
Lucy Taylor  
Thallus: composed of rounded, coarse granules, usually well developed, covering the surface of the substrate, forming a continuous crust, more rarely immersed granules: ecorticate, +globose, often rather scattered, intensely greenish yellow; outermost part of the granules: densely inspersed with minute, yellow crystals photobiont: trebouxioid Apothecia: developing from the lower side of the thalline granules, 0.6-1.3 mm tall, 10-22 times as long as the width of the stalk stalk: 0.04-0.08 mm in diam., black to pale brown, with a yellow pruina, at least in the upper part capitulum: obovoid or broadly obconical, 0.16-0.27 mm in diam. exciple: well developed, with dense yellowish green pruina on the lower side; hypothecium: broadly obconical with flat or slightly concave upper surface asci: produced singly from ascogenous hyphae with hooks, cylindrical, 14-19 x 2-3.5 µm, with a 5-9 µm long, narrow stalk; with uniseriate spores ascospores: non-septate, short ellipsoid to globose, 7-9 x 4-5 µm, with a coarse and irregular ornamentation Anamorph: hyphomycetous conidia: one-celled, 2-3 x 1 µm Spot tests: thallus K-, C-, KC-, P- Secondary metabolites: apothecial pruina and thallus with vulpinic acid. Substrate and ecology: on bark and wood or sometimes roots, of conifers (particularly Picea, Larix, and Pinus), on Abies lasiocarpa, less often birch, oaks, and other trees, in mixed forests World distribution: cold-temperate to temperate areas of both the Northern and Southern Hemispheres in Europe, Asia, North, Central and South America; Australasia, and Africa Sonoran distribution: Arizona at 1750 m. Notes: Although variable in apothecial size and thallus development, Chaenotheca chrysocephala is characterized by a bright greenish yellow thallus, a yellow pruina on the apothecia, its middle-sized apothecia, and its non-catenulate asci. The spores are rather small, spherical to ellipsoid, and have a coarse ornamentation.
Chaenotheca chrysocephala image
Troy McMullin  
Chaenotheca chrysocephala image
André Aptroot  
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image
Chaenotheca chrysocephala image