Observation 215972: Lecidea Ach.
When: 2015-09-12
Who: zaca
No herbarium specimen
0 Sequences

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

29% (1)
Eye3 Eyes3
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
Microscopy added; Still no conclusion!
By: zaca
2015-09-13 12:06:08 PDT (-0700)

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 16:21:39 PDT (-0700)
Last modified: 2015-09-13 12:05:06 PDT (-0700)
Viewed: 29 times, last viewed: 2017-06-20 17:58:20 PDT (-0700)
Show Log