Dactylina ramulosa (Hook. f.) Tuck.
Proc. Amer. Acad. Arts Sc., 5: 397, 1862. Basionym: Dufourea ramulosa Hook. - Bot. Appendix Parry J. Sec. Voy.: 414, 1825.
Synonyms: Dufourea muricata Laurer
Description: Thallus fruticose, loosely attached, straw-coloured spotted brownish yellow or pale violet-pruinose, shrubby. Branches to 2.5 cm tall, 1-2(-3) mm thick, erect to prostrate, subterete, fragile, dying at base, more or less sympodial with a few branches, but with many short, often black-tipped side branches, usually forming tufts. Epicortex c. 5 µm thick; cortex compact, 2-layered, the outer layer palisade plectenchymatous, c. 30 µm thick, composed of 3-4 layers of pachydermatous hyphae, the inner layer prosoplectenchymatous, 25-30 µm thick, the cells thick-walled, sharply distinguished from the arachnoid medullary hyphae; medulla hollow, with a few loosely arranged hyphae scattered in the cavity. Apothecia extremely rare (never found in Italian material), lecanorine, terminal on lateral branches, 1-3 mm across, with a brown disc and a crenulate thalline margin. Thalline exciple paraplectenchymatous, 2-layered; epithecium colourless or very pale brown; hymenium colourless, 50-60 µm high; paraphyses sparingly branched, 2.5-4 µm thick at mid-level, the apical cells 4-6 µm wide; hypothecium colourless. Asci 8-spored, broadly clavate, Lecanora-type, with biseriately arranged spores. Ascospores 1-celled, hyaline, globose, 4.5-6 µm in diam., thick-walled. Pycnidia rare, dark, knobby, globose, more frequent on lateral branches. Conidia oblong-citriform to almost bacilliform, straight, 5-7 x c. 1 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC- or KC+ yellow to pink, P-; medulla K-, C-, KC+ red, P+ red or P-. Chemistry: usnic acid (cortex) and usually physodalic and physodic acids in the medulla (in which case it reacts P+ red).
Growth form: Fruticose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by thallus fragmentation
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: absent
Montane belt: absent
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
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7129)
2002/01/02
P.L. Nimis CC BY-SA 4.0
TSB 44114
P.L. Nimis CC BY-SA 4.0
TSB 44114
Growth form: Fruticose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by thallus fragmentation
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: absent
Montane belt: absent
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
Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7129)
2002/01/02
P.L. Nimis CC BY-SA 4.0
TSB 44114
