Usnea pusilla (Räsänen) Räsänen
Details
Usnea pusilla (Räsänen) Räsänen (1937)
Usnea pusilla (Räsänen) Räsänen
Biostatus
Nomenclature
(Räsänen) Räsänen
Räsänen
Räsänen
1937
199
ICN
species
Usnea pusilla
Classification
Synonyms
Associations
Descriptions
Usnea pusilla (Räsänen) Räsänen
Thallus rather delicate, shrubby, ± fruticose or decumbent-straggling, 1-2.5 (rarely to 4) cm long, blackened at base, pale greenish-yellow, sparsely branched, 1-3-branched at base. Branches 1 mm thick at base tapering towards apices, terete, distinctly papillate, articulate-cracked, fibrils or secondary branches at right angles to main, inflated primary branches sparse to moderate, occasionally dense, matt or shining, waxy, lacking isidia, pseudocyphellae, soredia or spinules. Apothecia moderate to frequent, subterminal, geniculate, disc concave to plane, 1.5-2 mm wide, disc white-pruinose, margins with ray-like branchlets, exciple smooth, matt or slightly faveolate-wrinkled. Ascospores 9 × 5-6 µm. Chemistry: Usnic acid.
Taxonomic concepts
Usnea florida var. pusilla Räsänen
Usnea pusilla (Räsänen) Räsänen
Usnea pusilla (Räsänen) Räsänen
Usnea pusilla (Räsänen) Räsänen
Usnea pusilla (Räsänen) Räsänen
Collections
Metadata
8fe573db-eb8f-4aac-a985-b58bd19ef668
scientific name
Names_Plants
1 January 2000
15 February 2016