Hand-list Lich. Gr. Brit.: 6, 1912. Basionym: Cornicularia hispidula Ach - Lich. Univ.: 617, 1810
Synonyms: Ephebe spinulosa Th. Fr.
Description: Thallus microfruticose-filamentous, brown-black to black, dark-green to brown when wet, attached by a a narrow gelatinous holdfast, of terete, pointed filaments with numerous short, spinule-like side branches, (25-)50 µm thick in upper parts, 75-100(-110) µm thick in basal parts, forming uèp to 3 cm wide rosettes. Mycobiont cells loosely paraplectenchymatous, short-celled. Apothecia rare, up to 0.25 mm acrosss, sessile, terminal, developing from pycnidia on swellings on the branches, with a punctiform, dark brown disc, and a distinct, a persistent thalline margin and a distinct, blackish green proper matrgin. Proper exciple well-develoed, up to 50 µm wide; hymenium gelatinous, colourless, the upper part brown, I+ blue-green, K/I+ blue; paraphyses sparingly branched, the apices thickened; hypothecium colourless. Asci (8-)16-spored, cylindrical-obclavate, thin-walled, with a K/I+ blue outer layer, without apical dome. Ascospores 1-celled, hyaline, ovoid, 7-9 x 4-5 µm. Pycnidia rare, black, developing laterally from the filaments. Conidia bacilliform, 2-3 x 1-2 µm. Photobiont cyanobacterial (Stigonema); photobiont trichomes with true branchings, i.e. side branchlets formed by periclinal cell divisions in the photobiont trichome. Spot tests: all negative. Chemistry: without lichen substances
Note: on siliceous boulders along streams and small rivers; most records are from Northern Europe, with a single record from the Central Alps (Switzerland), which needs confirmation.