ITALIC 8.0

Parmelia barrenoae Divakar, M.C. Molina & A. Crespo

Lichenologist, 37: 43, 2005.

Synonyms:

Distribution: N - VA (Ossowska & al. 2021). C - Mol (Ravera 2012, Ravera & Genovesi 2012, Genovesi & Ravera 2014). S - Cal (Ravera & al. 2018b).

Description: Thallus foliose, heteromerous, dorsiventral, adnate to loosely adnate, forming 5-10 cm wide, regular rosettes. Lobes contiguous to overlapping and imbricate, apically rounded to sublinear, short, 2-7 mm wide, the older ones becoming revolute. Upper surface glaucous grey to whitish grey, finely foveolate, becoming reticulately cracked, with numerous laminal and marginal, linear to irregularly elongate, white pseudocyphellae that often form a network in marginal parts. Soralia linear, mainly laminal, developing from cracks in the cortex and soon releasing the granular soredia, leaving the pale medulla exposed at the bottom of the crack, thus appearing eroded and with a prominent, reflexed cortical margin. Lower surface black, with moderately abundant, simple to furcate (never squarrose), 1-2 mm long rhizines. Upper cortex paraplectenchymatous, of 2-6 layers of densely packed cells, with a usually non-pored epicortex, the cell walls with isolichenan; medulla white; algal layer continuous; lower cortex paraplectenchymatous, thinner than upper cortex. Apothecia and pycnidia not known. Photobiont chlorococcoid. Spot tests: upper cortex K+ yellow (but often slowly turning dirty red due to medullary substances), C-, KC-, P- or P+ faintly yellow; medulla K+ yellow turning dirty red, C-, KC-, P+ orange-red. Chemistry: upper cortex with atranorin; medulla with salazinic acid.

Note: mostly epiphytic, more rarely on siliceous rocks; the distribution in Italy is very poorly known because it was almost never distinguished from P. sulcata.

Growth form: Foliose, broad lobed

Substrata: bark

Photobiont: green algae other than Trentepohlia

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

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: rare

Padanian area: rare

Humid submediterranean belt: rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

Eva Barreno; Owner: Universidad de Valencia

Spain, Castellon, Sierra del Toro
28.06.2008
on Quercus rotundifolia

E. Pittao

TSB 30916)

E. Pittao

TSB 30916)

E. Pittao

TSB 30916)

E. Pittao

TSB 30916)