Français English

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum (Taylor) M. Choisy

Synonyms:

Parmelia reticulata Taylor

Rimelia reticulata (Taylor) Hale & Fletcher



Family: PARMELIACEAE

Habitat: Ubiquitous

Description

    Thallus foliose, loosely attached to the substratum, to 15 cm across, lobes 5-15 mm wide, tips rounded and crenulate; upper surface grey-glaucous, pale grey, minutely reticulated, reticulations suggesting minute cracks on old and dry specimen, swollen and capitate soralia at lobe margins, cilia almost absent or then very short and black; lower surface dark brown to black with simple rhizines extending up to the margin. Apothecia very scarce, markedly sessile and almost shortly stipitate, 5-8 mm diam., disc brownish, exciple sorediate.  Ascospores simple, ellipsoid, 13-19 x 8-10 µm. Cortex: C-, KC-, K+ yellow (red after a few minutes and cortex lysis and medulla reaction), Pd+/- yellow ; medulla: C-, KC+ yellow > red, K+ yellow > red, Pd+ red-orange, UV-. Oceanic trends, rather common on tree trunks and also on mossy rocks. Not to be confused with Parmotrema perlatum of which soredia distribution suggests pearl necklace, without rhizine at lobe margins, without reticulum on the lobe upper surface and K+ yellow, nor with Parmotrema arnoldii, which is Pd- and with long black cilia towards lobe margins.

N.B. It was described in 1974 Parmotrema pseudoreticulatum very similar and only distinguishable with certainty by DNA analysis but which differs macroscopically by the absence of rhizines towards the margin of the lobes, thicker and less upturned with on the upper side a less clear network and incomplete or replaced by smudges or stippling, but there seem to be intermediates.





Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Pointe du Raz 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Plogonnec 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema perlatum Pointe de Pen-Hir
Alain GERAULT

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Pointe de Rostudel
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Cranou
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Porz Kreguen
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum avec Teloschistes flavicans Pointe du Raz 1
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Fertile Hôpital-Camfrout 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Fertile Cap de la Chèvre 1
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Pointe de Toulinguet 1
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Pointe de Toulinguet 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Fertile avec Ramalina siliquosa Porz Kreguen 4
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Fertile Porz Kreguen 5
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Plogonnec 1
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Trégunc-sur-mer 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Trégunc-sur-mer 3
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum Test P Kergoat 1
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum sur écorce de pin Pointe du Guern 2
Bernard BOUFFINIER

Parmotrema reticulatum (Taylor) M. Choisy

Parmotrema reticulatum sur écorce de pin Pointe du Guern 1
Bernard BOUFFINIER



Return
Content : Alain Gérault - Website development : Sylvain Ard - Hosting : Online.net