Usnea tenerior Nyl.
Details
Biostatus
Nomenclature
Nyl.
Nyl.
1888
272
ICN
Usnea tenerior Nyl.
species
Usnea tenerior
Classification
Associations
Descriptions
Usnea tenerior Nyl.
Thallus fruticose, erect to somewhat straggling, 2-3(-5) cm long, rather fine and delicate, entangled, yellow to yellow-white or greenish, matt, distinctly faveolate or indented in basal parts, branching sympodial. Branches 1-1.5 mm wide at base, tapering towards apices, terete, inflated, articulate-cracked at joints, without isidia, soredia, papillae, tubercles or spinules. Apothecia crowded, terminal or subterminal, 2-3 mm diam., disc concave, densely white-pruinose, without ray-like branchlets at margins, or ray-like branchlets sparsely present, short, exciple deeply cupuliform, smooth or wrinkled. Ascospores 10 × 6-7 µm. Chemistry: Norstictic and usnic acids.
Taxonomic concepts
Collections
Notes
editorial
Galloway (2007) interpreted Nylander's (1888) "*U. tenerior", that was printed in italics under a bold "Usnea articulata" heading and definitely appears to be part of his entry on his lichen No. 58 entry, as being published at a subspecific rank. Galloway regarded Usnea tenerior as a species name to be published as Usnea tenerior (Nyl.) Hue, Nouv. Archs Mus. Hist. Nat. Paris, sér. 3, 2: 272 (1890).
Others interpret Nylander's 1888 publication as a species of Usnea.
After consideration, I have decided to follow the latter view, although with some misgivings. S. Gibb 11 Sept. 2019.
Metadata
e9682b76-5ff6-4ea8-8124-cb7e95bd01b2
scientific name
Names_Plants
1 January 2000
11 September 2019