Dibaeis baeomyces (L. f.) Rambold & Hertel
in Rambold & al., Bibl. Lichenol., 53: 231, 1993. Basionym: Lichen baeomyces L. f. - Suppl. Plant.: 450, 1781 (1782).
Synonyms: Baeomyces roseus f. abortivus A. Massal.; Baeomyces roseus Pers.; Dibaeis rosea (Pers.) Clem.
Description: Primary thallus crustose, grey, white or very pale grey, thick, areolate, usually with soft, rounded, white to pinkish grey, more or less glossy, wart-like, rarely sorediate schizidia which are up to 1 mm wide in sterile thalli, 0.1-0.3 mm wide in fertile thalli. Cortex of thallus c. 50 µm thick, of thin-walled, vertically oriented hyphae; medulla very loose, paraplectenchymatous in parts; cortex of schizidia consisting of interwoven hyphae parallel to the surface; inner part of stalks with strands of thin-walled 2.5-3 µm thick hyphae, those under the hymenium up to 5 µm thick. Apothecia frequent, globose also when young, often hollow inside, pink, 1-4 mm wide, emarginate or with a narrow margin when young, brought on erect, subfruticose, smooth, ecorticate, white stipes (podetia) which are 2-5(-6) mm tall and to 3 mm wide. Proper exciple poorly developed, of radially arranged hyphae; epithecium with colourless crystals dissolving in K (present also in the hymenium); hymenium colourless, 100-120(-140) µm high, K/I+ blue (reaction ephemeral!); paraphyses simple, not anastomosing, 2-2.5 thick at mid-level, the apical cells only slightly wider; hypothecium colourless or yellowish in upper part. Asci 8-spored, thin walled, cylindrical, the walls and tip K/I+ blue, with a distinct ocular chamber in the tholus, Icmadophila-type. Ascospores 1-celled (some apparently 2-celled for the presence of a pseudo-septum), hyaline, fusiform, (10-)12-26 x 2-3 µm. Pycnidia 0.1-0.2 mm across, immersed in warts, mostly laminal, with a colourless wall (brownish near the ostiole), the conidiogenous cells catenate, barrel-shaped. Conidia pleurogenous, short-bacilliform, 3.5-5 x c. 1 µm. Photobiont chlorococcoid (Coccomyxa). Spot tests: thallus K+ yellow-orange, C-, KC+ orange, P+ yellow to orange, UV+ orange; medulla P+ yellow to orange, UV+ orange. Chemistry: baeomycesic acid, and variable amounts of squamatic and barbatic acids and atranorin.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: rare
Montane belt: rather rare
Dry submediterranean belt: very rare
Humid submediterranean belt: very rare
Padanian area: extremely rare
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
Current prediction (1981-2010)
Future prediction (2071-2100) SSP 1-2.6
Future prediction (2071-2100) SSP 5-8.5Predictive maps according to Francesconi et al. 2025
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Dibaeis_baeomyces.htm
France, Haute-Savoie 2010

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi
with Baeomyces rufus (right)

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Kergonan
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Bodvarec
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Pointe de Dinan
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Roscanvel
sterile form

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany; Bavaria: Alps.

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.

Felix Schumm - CC BY 4.0
[84], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten an der
Rems, Wegböschung im Wald zwischen Calluna, TK:7222. Leg. E.
Putzler, 17.05.1949, det. E. Putzler. -Thallus P+ gelb, K-; Apothecien
K-.

Felix Schumm - CC BY 4.0
[84], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten an der
Rems, Wegböschung im Wald zwischen Calluna, TK:7222. Leg. E.
Putzler, 17.05.1949, det. E. Putzler. -Thallus P+ gelb, K-; Apothecien
K-.

Felix Schumm - CC BY 4.0
[85], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten im
Remstal, Böschung eines Waldweges im Gemeindewald, TK: 7222.
Leg. Erich Putzler, 17.07.1948, det. J. Poelt. -

Felix Schumm - CC BY 4.0
[85], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten im
Remstal, Böschung eines Waldweges im Gemeindewald, TK: 7222.
Leg. Erich Putzler, 17.07.1948, det. J. Poelt. -

Felix Schumm - CC BY 4.0
[1991], Germany, Baden-Württemberg, Kreis Göppingen, Zell bei
Börtlingen, am Rand eines Waldweges im Waldteil "Ob dem See", ca
410 m, TK: 7223.leg. et det. F. Schumm

Felix Schumm - CC BY 4.0
[1991], Germany, Baden-Württemberg, Kreis Göppingen, Zell bei
Börtlingen, am Rand eines Waldweges im Waldteil "Ob dem See", ca
410 m, TK: 7223.leg. et det. F. Schumm

Felix Schumm - CC BY 4.0
[8865], USA, Maine, Washington Co.: an der Strasse Nr. 187 an der
Küste bei Jonesport, 44°33.979' N, 67°34.339, 20' W, sandiger Straßenrand.
Leg. F. Schumm, 21.08.2001, det. F. Schumm.
Thallus

Felix Schumm - CC BY 4.0
[8865], USA, Maine, Washington Co.: an der Strasse Nr. 187 an der
Küste bei Jonesport, 44°33.979' N, 67°34.339, 20' W, sandiger Straßenrand.
Leg. F. Schumm, 21.08.2001, det. F. Schumm.
Thallus

Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in nem. Montello
as Baeomyces roseus
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: rare
Montane belt: rather rare
Dry submediterranean belt: very rare
Humid submediterranean belt: very rare
Padanian area: extremely rare
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



Predictive maps according to Francesconi et al. 2025

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Dibaeis_baeomyces.htm
France, Haute-Savoie 2010

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Cranou

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=288&lang=en
France, Rocroi
with Baeomyces rufus (right)

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Kergonan
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Bodvarec
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Pointe de Dinan
sterile form

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=971&lang=en
France, Roscanvel
sterile form

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany; Bavaria: Alps.

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.

Felix Schumm - CC BY 4.0
[84], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten an der Rems, Wegböschung im Wald zwischen Calluna, TK:7222. Leg. E. Putzler, 17.05.1949, det. E. Putzler. -Thallus P+ gelb, K-; Apothecien K-.

Felix Schumm - CC BY 4.0
[84], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten an der Rems, Wegböschung im Wald zwischen Calluna, TK:7222. Leg. E. Putzler, 17.05.1949, det. E. Putzler. -Thallus P+ gelb, K-; Apothecien K-.

Felix Schumm - CC BY 4.0
[85], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten im Remstal, Böschung eines Waldweges im Gemeindewald, TK: 7222. Leg. Erich Putzler, 17.07.1948, det. J. Poelt. -

Felix Schumm - CC BY 4.0
[85], Germany, Baden-Württemberg, Rems-Murr-Kreis, Stetten im Remstal, Böschung eines Waldweges im Gemeindewald, TK: 7222. Leg. Erich Putzler, 17.07.1948, det. J. Poelt. -

Felix Schumm - CC BY 4.0
[1991], Germany, Baden-Württemberg, Kreis Göppingen, Zell bei Börtlingen, am Rand eines Waldweges im Waldteil "Ob dem See", ca 410 m, TK: 7223.leg. et det. F. Schumm

Felix Schumm - CC BY 4.0
[1991], Germany, Baden-Württemberg, Kreis Göppingen, Zell bei Börtlingen, am Rand eines Waldweges im Waldteil "Ob dem See", ca 410 m, TK: 7223.leg. et det. F. Schumm

Felix Schumm - CC BY 4.0
[8865], USA, Maine, Washington Co.: an der Strasse Nr. 187 an der Küste bei Jonesport, 44°33.979' N, 67°34.339, 20' W, sandiger Straßenrand. Leg. F. Schumm, 21.08.2001, det. F. Schumm. Thallus

Felix Schumm - CC BY 4.0
[8865], USA, Maine, Washington Co.: an der Strasse Nr. 187 an der Küste bei Jonesport, 44°33.979' N, 67°34.339, 20' W, sandiger Straßenrand. Leg. F. Schumm, 21.08.2001, det. F. Schumm. Thallus
