ITALIC 8.0

Rhizocarpon leptolepis Anzi

Comm. Soc. Critt. Ital., 1: 158, 1862 nom. nud.

Synonyms: Rhizocarpon phalerosporum (Vain.) Vain.

Distribution: N - TAA, Lomb, Piem (Isocrono & al. 2004).

Description: Thallus crustose, episubstratic, areolate, forming patches to 10 cm in diam., consisting of 0.3-0.6(-1) mm wide, round, reddish brown to brown, flat to slightly convex, peltate areoles with free, often blackened margins, which are usually more or less scattered on a conspicuous black hypothallus. Cortex overlain by a 20-30 μm thick epinecral layer; medulla white, I- (rarely I+ faintly blue). Apothecia lecideine, black, slightly constricted an base, scattered on the hypothallus, c. 0,6 mm across, at first with a flat disc and a thick proper margin, finally convex and immarginate. Proper exciple brown-black, almost carbonized in outer part, K+ red (solution); epithecium dark grey-green to brown, K+ reddish or K-; hymenium colourless, 100-150 μm high; hypothecium brown-black. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, at first almost colourless, finally brown, 28-38 x 14-21 μm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-. Chemistry: an unknown substance in the medulla.

Note: a boreal-montane to arctic-alpine species growing on steeply inclined surfaces of hard siliceous rocks in sheltered situations, mostly in upland areas; probably restricted to the Alps in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: extremely rare

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 http://www.stridvall.se/la/galleries.php

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

Herbarium: TSB (8234)
2001/12/01

P.L. Nimis CC BY-SA 4.0

TSB 8234

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