Observation 201834: Lecidoma demissum (Rutstr.) Gotth. Schneider & Hertel

When: 2015-03-21

Collection location: Serra de São Mamede, Portugal [Click for map]

Who: zaca

No specimen available

This is my first observation of this species, which has a distinctive appearance and somewhat unusual features:

- Thallus areolate, very much contorted, almost squamulose at places, thick, grey with a shade of blue;
- Apothecia frequent, semi-immersed in the thallus or adnate, convex with excluded margins, red-brown;
- Photobiont a green alga with globose cells, up to 15 µm in diameter;
- Hymenium very light colored (shades of brown and grey), I+ blue, epihymenium brown, hypohymenium brown-black;
- Paraphysis strong agglutinated, brown at the tips;
- Spores hyaline, ellipsoid, ~ 12 × 7 µm (only four observed).

The specimen grew on a thin layer of soil over granitic rock.


Apothecial section plus a spore and algal cells.

Proposed Names

58% (1)
Eye3 Eyes3
Used references: British Flora
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Neat! I’ve never seen this genus!
By: Jason Hollinger (jason)
2015-03-25 15:39:43 CDT (-0400)

Created: 2015-03-25 15:19:41 CDT (-0400)
Last modified: 2015-03-25 15:19:52 CDT (-0400)
Viewed: 32 times, last viewed: 2018-01-16 15:44:23 CST (-0500)
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