ITALIC 8.0

Rinodina efflorescens Malme

Svensk Bot. Tidskr., 21: 251, 1927.

Synonyms: Lecanora hueana Harm.; Rinodina hueana (Harm.) H. Olivier nom. illegit. non Vain.

Distribution: N - Ven (Thor & Nascimbene 2007). C - Tosc. S - Si (Nimis & al. 1996b).

Description: Thallus crustose to subsquamulose, episubstratic, usually forming small irregular patches, areolate, sorediate, usually without a distinct prothallus. Areoles grey-brown to green-brown, matt, usually scattered, irregularly rounded, often somewhat divided, flat to distinctly convex, often free from the substratum towards the margin, up to 0.3(-0.9) mm in diam. Soralia bursting from the areoles, brown, greyish brown or dull greenish yellow, punctiform, more or less flat, up to 0.15 mm in diam. Soredia farinose, 12-30 μm in diam., sometimes a few gathered in larger, rounded consoredia; external soredia sometimes distinctly brown, the brown pigment K+ fuscous brown, N-. Apothecia rare, lecanorine, 0.3-0.5 mm across, with a dark reddish brown to black-brown, flat disc and a usually esorediate thalline margin. Epithecium red-brown; hymenium and hypothecium colourless. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, 15-22 x 7-10 µm, Milvina-type. Photobiont chlorococcoid. Spot tests: K- (external, pigmented soredia K+ fuscous brown), C-, KC-, P+ red, UV+ orange. Chemistry: pannarin, secalonic acid A, rarely zeorin.

Note: a mild-temperate, suboceanic species found on twigs and boles of deciduous trees, especially Quercus and Fagus, in open, moist deciduous woodlands; to be looked for further in the Alps.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

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5

(info)

Solar irradiation:

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5

(info)

Aridity:

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5

(info)

Eutrophication:

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5

(info)

Poleotolerance:

0

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3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php