ITALIC 8.0

Lecidea promiscua Nyl.

Flora, 57: 357, 1874.

Synonyms: Lecidea dilabens Th. Fr.; Lecidea gregalis Arnold; Lecidea speciosa Müll. Arg.

Distribution: N - Frl (TSB 2738), TAA (Nascimbene & al. 2022). C - Sar.

Description: Thallus crustose, episubstratic, rather thick, white to grey white, areolate, without a distinct prothallus, forming up to 10 cm wide patches. Medulla I+ intensely blue-violet. Apothecia lecideine, black, usually numerous, sessile and strongly constricted at base, rounded to angular by mutual compression, 0.5-2(-3) mm across, with a flat to convex, epruinose or slightly pruinose disc and a thin, weakly raised, persistent proper margin. Proper exciple greenish black along a thin, peripheral rim partly extending below the hypothecium, pale grey or colourless within, C-; epithecium dark green to greenish black, N+ purple; hymenium colourless of pale green in upper part, 40-55 μm high, I+ blue; paraphyses coherent, the apical cells swollen; hypothecium medium to dark brown, up to 200 μm high. Asci 8-spored, clavate, Lecidea-type. Ascospores 1-celled, hyaline, oblong or oblong-ellipsoid, (7.5)8.5-12(-13) x 3.5-5 μm, 2-3.2 times as long as wide. Pycnidia black, semi-immersed. Conidia bacilliform to filiform. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus with 2’-0-methylperlatolic acid (major).

Note: a member of the difficult L. auriculata-complex, closely related to L. promiscens and with a similar ecology, apparently common in the Alpine belt of the Alps, but overlooked.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: extremely rare

Oromediterranean belt: extremely rare

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

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

S. Poumarat - Source: http://mycologie.catalogne.free.fr/lichens.htm