Melaspilea rhododendri (Arnold & Rehm) Almq.
K. Svenska Vetensk.-Akad. Handl., 17, 6: 44, 1880. Basionym: Arthonia rhododendri Arnold & Rehm - Flora, 15: 152, 1872.
Synonyms:
Description: Thallus crustose, endosubstratic or thinly episubstratic, continuous to patchy, white, yellowish white or grey-white, without a distinct prothallus, doubtfully lichenized. Apothecia lirelliform, black, 0.2-0.8(-1.5) x 0.06-0.2(-0.3) mm, straight or curved, simple or sparingly branched, rarely round, semi-immersed to sessile, with an initially concave and slit-like, later exposed disc and a shiny, persistent proper margin. Proper exciple prosoplectenchymatous, black, carbonized, 20-25 µm wide laterally, not extending below the hymenium; epithecium brown-black to green-black, without crystals, K-; hymenium colourless, 30-55 µm high, I+ reddish orange; paraphyses thread-like, mostly simple, strongly coherent, the apical cells 3-4 µm wide; hypothecium poorly developed, colourless to yellowish brown. Asci (6-)8-spored, elongate-clavate, the apical thickening with an internal beak, K/I-. Ascospores 1-septate, with unequal cells, slightly constricted at septum, at first hyaline, then brownish, sole-shaped, 10-16 x (4-)5-6(-7) µm. Photobiont absent, but thallus sometimes loosely accociated with trentepohlioid algae. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: very rare
Montane belt: extremely rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: very rare
Montane belt: extremely rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
