ITALIC 8.0

Stereocaulon coniophyllum I.M. Lamb

Bot. Not., 114: 267, 1961.

Synonyms:

Distribution: N - TAA (Thor & Nascimbene 2007, Nascimbene & al. 2022).

Description: Primary thallus crustose, ephemeral, usually absent in mature individuals, secondary thallus fruticose. Pseudopodetia with a solid cartilaginous axis of parallel hyphae surrounded by a lax medulla, erect, firmly attached, 2.5-4(-5) cm tall, robust, rigid, irregularly branched, ecorticate, glabrous. Phyllocladia lacking, replaced by whitish, granular soredia, effuse or arranged in spathulate apical expansions of the branches. Cephalodia conspicuous, lateral, subglobose to convolute-tuberculate or divided into verrucose masses, 1-2 mm across, brown or glaucous-grey, containing Nostoc. Apothecia terminal, concave or flat to becoming convex, large, 1.5-4 mm across, with a dark brown to blackish brown disc and a thin, soon excluded proper margin. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless; paraphyses simple or sparingly branched, 1-2 µm thick, the apical cells capitate, 3-4 µm wide, with a dark cap; hypothecium brownish. Asci 8-spored, cylindrical-clavate, with a K/I+ blue outer layer and apical dome, and a central, K/I+ darker blue tube, Porpidia-type. Ascospores (3-)5-7-septate, hyaline, elongate-fusiform, straight or slightly curved, 40-65 x 3.5-4 µm. Pycnidia dark, semi-immersed. Conidia 1-celled, hyaline bacilliform, straight, 4-5 x c. 0.8 µm. Spot tests: K+ yellow, C-, KC- or KC+ violet (reaction often difficult to observe macroscopically, best evident on acetone extract on filter paper!), P- or P+ faintly yellow, UV+ blue-white; soredia P+ sulphur yellow. Chemistry: atranorin and lobaric acid.

Note: an arctic-alpine to boreal-montane, circumpolar lichen found on siliceous rocks near and above treeline; to be looked for further in the Alps.

Growth form: Fruticose

Substrata: rocks

Photobiont: green algae other than Trentepohlia (primary); cyanobacteria, filamentous (e.g. Nostoc, Scytonema) (secundary, e.g. in cephalodia)

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: rare

Oromediterranean belt: absent

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

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

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