Gyalecta-jenesis_12

Description:

Gyalecta jenensis (Batsch) Zahlbr., syn.: Gyalecta cupularis (Hedw.) Schaer., Lecidea cupularis (Hedw.) Ach., Cappellettia cupularis (Hedw.) Tomas. & Cif.Rock Dimple Lichen, Dimple LichenSlo.: - ?Dat.: Feb.: 10. 2018Lat.: 46.36023 Long.: 13.596308Code: Bot_1111/2018_DSC0872Habitat: narrow canyon; stony, vertical, calcareous, manmade supporting wall; north aspect; very humid place with no sun most of the year; in total shade; about 1.5 m above the mountain stream; exposed to direct rain; average precipitations ~ 3.000 mm/year, average temperature 8-10 deg C, current temperatures from -5 at night to +4 deg C during the day, rainy weather; elevation 470 m 1.530 feet), alpine phytogeographical region.Substratum: calcareous rocks of a vertical wall of a bridge over a mountain stream.Place: Bovec basin, at the mouth of Bavica valley; near the destroyed water mill on umnik stream; East Julian Alps, Posoje, Slovenia EC Comments: Gyalecta jenensis is a quite common but nice small jewel among crustose, saxicolous (growing on rocks) lichens. It has waxy-looking, from pale or vividly yellow to deep orange apothecia with whitish, usually cracked to segments margins. The inconspicuous thallus is grayish with sometimes pink tint but often covered by dark layer of cyanobacteria, which makes its appearance black (Ref.:1). It is often found together with Trentepohlia aurea, an orange filamentous algae capable to live outside water (see orange tufts on pictures 11b and 12b). The photobiont of Gyalecta jenensis is also Trentepohlia algae. The lichen was in damp state when photographed. This species was photographed at this place almost exactly ten years ago. Ref.:(1) I.M. Brodo, S.D. Sharnoff, S.Sharnoff, Lichens of North America, Yale Uni. Press (2001), p 329.(2) V. Wirth, R. Duell, Farbatlas Flechten und Moose, Ulmer, (2000), p 410.(3) C.W.Smith, et all, The lichens of Great Britain and Ireland,The British Lichen Society (2009), p 255.(4) F.S. Dobson, Lichens, The Richmonds Publishing Ca.LTD (2005), p 183.(5) www.aphotoflora.com/algae_trentepohlia_aurea_orange.html (Trentepohlia aurea) (accessed Feb. 12. 2018)