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.
Distribution: N - VG, Frl (Tretiach & Hafellner 2000), Ven (Lazzarin 2000b), TAA (Caniglia & al. 2002, Nascimbene 2008b, Bilovitz & al. 2014, Nascimbene & al. 2022), Lomb (Dalle Vedove & al. 2004, Gheza 2018, 2019b), Piem (Isocrono & al. 2004, Isocrono & Piervittori 2008, Gheza 2020), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999), Emil (Dalle Vedove & al. 2002, Fariselli & al. 2020), Lig (Watson 2014). C - Tosc (Benesperi & al. 2007), Marc. S - Si.
Description: Primary thallus crustose, grey, white or pale pinkish, thick, areolate, usually with soft, rounded, white, more or less shiny, warty schizidia which are up to 1 mm wide in sterile thalli, 0.1-0.3 mm wide in fertile thalli. Apothecia frequent, globose also when young, often hollow inside, pink, 1-4 mm broad, emarginate or with a narrow margin, brought on erect, subfruticose, smooth, ecorticate, white stipes (podetia), which are 2-5 mm tall and to 3 mm wide. Epithecium with colourless crystals (present also in the hymenium); hymenium 120-140 µm high, K/I+ blue (reaction ephemeral!); hypothecium colourless; paraphyses simple, not anastomosing, only slightly thickened above. Asci 8-spored, unitunicate, cylindrical, thin-walled, slightly thickened above, I+ blue, the tip I+ deep blue, Icmadophila-type. Ascospores hyaline, mainly 1-celled (some 2-celled), fusiform, 10-26 x 2-3 µm. Pycnidia 0.1-0.2 mm across, immersed in warts, mostly laminal, with a colourless wall (brownish near the ostiole). Conidia shortly bacilliform, 3.5-5 x c. 1 µm. Photobiont chlorococcoid. 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.
Note: on humid, disturbed clay soil, often in Calluna-heaths, most frequent in upland areas. For further details see Gierl & Kalb (1993).
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
Oromediterranean belt: very rare
Montane belt: rather rare
Submediterranean belt: very rare
Padanian area: extremely rare
Humid submediterranean belt: very rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

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

Triin Aimla; Owner: University of Tartu

Curtis Randall Björk – CC BY-SA 4.0
Corageous Lake, Northwest Territories, Canada

Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall

Nere Sorrentino
Spain, Galicia, Pontevedra

Nere Sorrentino
Spain, Galicia, Pontevedra

Helena Rodriguez
Spain, Asturias, Pontevedra

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.
var. complicatus

P.L. Nimis CC BY-SA 4.0
TSB 13664

P.L. Nimis CC BY-SA 4.0
TSB 41212

P.L. Nimis CC BY-SA 4.0
TSB 37287

P.L. Nimis CC BY-SA 04
TSB 43931

P.L. Nimis CC BY-SA 04
TSB 43931

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