Observation 215972: Lecidea Ach.

When: 2015-09-12

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

Notes:
Growing on a wall made of stones and cement.

Images

555812
Microscopy: Apothecial section;
555635
555636
555813
Microscopy: epi- and hypo- thecium;
555814
Microscopy: Asci and spores.
555815
Microscopy: Ascus stain in lugol.

Proposed Names

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Comments

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Microscopy added; Still no conclusion!
By: zaca
2015-09-13 15:06:08 CDT (-0400)

Spores simple, hialine, guttulate, without perispore, with the following dimensions (some spores within the asci were included in the measurements, these being of larger dimensions):
(14) 16.2 – 20.6 (21) x (6.1) 7.1 – 9.1 (9.6) µm
Q = (1.8) 2 – 2.6 (3) ; N = 29
Me = 18.5 × 8.1 µm ; Qe = 2.3 .
These spores features rule out Porpidia (having spores with perispore) and most of the species of Lecidea as well as of_Lecidella_ .
The British Flora only has a species of Lecidea with spores compatible: L. Phacops (12 – 18(-23) x 5-6 (-7) um), but narrower; Moreover, such species has a red-brown epithecium (which is blue-green in my specimen). The same happens with the genus Lecidella, where only L. meiococca has spores of similar dimensions, but other features, like deeper grey thallus and C+ orange reaction on thallus.
In conclusion … no conclusion!

Created: 2015-09-12 19:21:39 CDT (-0400)
Last modified: 2015-09-13 15:05:06 CDT (-0400)
Viewed: 31 times, last viewed: 2017-12-17 15:39:28 CST (-0500)
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