Lempholemma cladodes (Tuck.) Zahlbr.

Cat. Lich. Univ., 3: 23 1925. Basionym: Collema cladodes Tuck. - Gen. Lich.: 89, 1872
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Distribution:
Description: Thallus small-fruticose, gelatinous when wet, dark olivaceous brown to black, forming spreading cushions, consisting of decumbent to ascending, terete, often finely striate, mostly dichotomously branched, up to 2 mm long lobes with swollen, up to 0.3 mm wide apices containing initially globose, finally bursting open and cup-like hormocystangia producing 25-35 x 10-15 μm hormocysts, Apothecia (pycnoascocarps) very rare, terminal, globose, 0.2-0.4 mm across, with a convex, blackish disc and a thick, smooth, persistent thalline margin. Proper exciple very thin, of parallel hyphae; epithecium yellowish brown; hymenium and hypothecium colourless, I+ reddish brown, K/I+ blue; paraphyses mostly simple, not apically thickened, adglutinated; hypothecium colourless. Asci 8-spored, prototunicate, cylindrical, without a distinct apical apparatus. Ascospores 1-celled, hyaline, globose, 15-20 μm. Pycnidia apical, immersed. Conidia bacilliform. Photobiont cyanobacterial (Nostoc, in chains), the individual cells 4-5 μm wide. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on more or less calciferous rocks with periodical percolation of water in cool situations; widespread in the Northern Hemisphere (Scandinavia, North America), but not common; rarely collected in the Alps, being only known from Switzerland. To be looked for in the Italian Alps.
Growth form: Fruticose

Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
On otherwise dry surfaces with short periods of water seepage after rain

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Predictive model
Herbarium samples

Samul Brinker – CC-BY-SA NC – Source: https://www.inaturalist.org/taxa/223158-Lempholemma-cladodes



Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley, Flatiron Trail Date: 2009-04-03 On underhang of basalt cliff in open conifer-birch forest, calc-modified by seepage



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte



Juri Nascimbene CC BY-SA 4.0
Italy, Veneto, BL, Vette di Felte


LITERATURE