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Umbilicaria cylindrica (L.) Delise ex Duby var. cylindrica

Synonyms:

Family: UMBILICARIACEAE

Habitat: Ubiquitous

Description

    Thallus foliose, to 2-10 cm diam., single or multi-lobed, rounded, wavy, margin with numerous branched black cilia, 3-5 mm long, upper surface wrinkled towards the center, more or less pruinose, grey-whitish, grey, dark grey, tinged-brown, lower surface pale grey-brown with densely packed rhizinomorphs, notably towards the margin. Apothecia usually numerous, more or less globose, 2-4 mm diam., black, gyrose (circularly folded, apparently with several coils). Ascii 8-spored, 50-60 x 15-25 µm according to our measures. Ascospores simple, broadly ellipsoid, , 9-15 x 3-9 µm. Photobiont: chlorococcoid. Medulla : C-, K+/- yellow > red, KC+ red, Pd+ orange. On exposed siliceous rocks, extremely rare in our prospection area due to its mountainous trends. N.B. This species is highly variable and numerous forms and varieties have been described but their validation is questionable. See Umbilicaria crustulosa without black rhizines at the margin and with non-gyrous apothecia.







Umbilicaria cylindrica Val d'Aoste 2
Jacques HAINE



Umbilicaria cylindrica Mercantour 1
Jacques HAINE



Umbilicaria cylindrica Val d'Aoste 1
Jacques HAINE



Umbilicaria cylindrica Val d'Aoste 3
Jacques HAINE



Umbilicaria cylindrica Val d'Aoste 4
Jacques HAINE



Umbilicaria cylindrica Val d'Aoste 5
Jacques HAINE



Umbilicaria cylindrica Tarentaise 1
Jacques HAINE



Umbilicaria cylindrica Apothécie Tarentaise 2
Jacques HAINE



Umbilicaria cylindrica Apothécie coupe Tarentaise 3
Jacques HAINE



Umbilicaria cylindrica Apothécie coupe micro Bleu Coton Tarentaise 4
Jacques HAINE



Umbilicaria cylindrica Asque Rouge Congo Tarentaise 5
Jacques HAINE



Umbilicaria cylindrica Spores Rouge Congo Tarentaise 6
Jacques HAINE



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