ITALIC 8.0

Phaeorrhiza sareptana (Tomin) H. Mayrhofer & Poelt var. sphaerocarpa (Th. Fr.) H. Mayrhofer & Poelt

Nova Hedwigia, 30: 793, 1979 (“1978”). Basionym: Rinodina nimbosa var. sphaerocarpa Th. Fr. - Lichenogr. Scand., 1: 193, 1871.

Synonyms: Buellia hypoleuca H. Magn.; Phaeorrhiza sareptana (Tomin) H. Mayrhofer & Poelt var. sphaerocarpa (Th. Fr.) H. Mayrhofer

Distribution: N - Ven (TSB 3222), TAA.

Description: Thallus squamulose or subfoliose, heteromerous, the squamules 1-3 mm wide, flat to convex, pale brown but usually finely white-pruinose, except in shade-forms which are yellowish green, scattered or aggregated into convex hummocks, attached by brown rhizohyphae. Upper cortex 30-40 μm thick, paraplectenchymatous, with a 10-20 μm thick epinecral layer; medulla white in upper part, brown in lower part, rather lax, 100-130 μm thick; lower cortex poorly developed, with numerous brown rhizohyphae. Apothecia lecideine, to 1 mm across, at first partially immersed but soon adnate, with a dark, initially flat then convex disc and a thin, finally excluded proper margin. Proper exciple dark; epithecium reddish brown; hymenium colourless, 80-100 μm high, inspersed with oil droplets; paraphyses 2-3 μm thick at base, the apical cells swollen, 5-6 μm wide; hypothecium colourless, reaching the pigmented lower part of the medulla. Asci 8-spored, broadly clavate, with a I+ blue tholus, a broad ocular chamber, and a cylindrical to short-conical axial mass. Ascospores 1-septate, slightly constricted at septum, brown, ellipsoid, 17-20 x 8.5-10 μm, Buellia-type, not thickened at apex. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC-, P-, UV-; lower part of medulla sometimes K+ violet, C-, KC-, P+ red. Chemistry: unidentified substances in the medulla.

Note: on naked earth, dead mosses and plant debris in dry grasslands near and above treeline, reaching the nival belt in the Alps.

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: extremely 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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 25183

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (25183)
2002/02/21