Observation 207601: Collema latzelii Zahlbr.
When: 2015-02-21
Who: zaca
No herbarium specimen

Notes: Growing on calcareous rock.
Collema latzelii is similar to some forms of C. fuscovirens, the main differences being: 1) Thinner thallus; 2) The existence of a pseudocortex in the thalline exciple (see the photos with the sections); 3) Apothecia smaller; 4) Ascospores similar in dimensions, but with subglobose spores mixed with ovoid ones, sometimes in the same ascus (see the photo with the asci, where subglobose spores appear in the asci on the right). In observation 179430 I made the microscopy of this species for the first time.

Images

531129
531130
531131
531132
532416
Microscopy: Apothecial section;
532417
Microscopy: Apothecial section;
532418
Microscopy: Apothecial section;
532419
Microscopy: Thalline exciple;
532420
Microscopy: Thallus section section;
532421
Microscopy: Asci (and spores);
532422
Microscopy: Spores;

Proposed Names

86% (1)
Eye3 Eyes3
Recognized by sight
Used references: P. Carvalho, Collema, Sociedade Española de Liquenología, Flora Liquenológica Ibérica, vol. 10, 2012.
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Microscopy added.
By: zaca
2015-06-28 15:48:55 EDT (-0400)

Spores:
(15.9) 16.9 – 21.8 (23.3) x (7.1) 8.6 – 12.4 (13.4) µm
Q = (1.4) 1.5 – 2.2 (2.5) ; N = 25
Me = 19.7 × 10.6 µm ; Qe = 1.9

Created: 2015-06-24 20:10:41 EDT (-0400)
Last modified: 2015-06-28 15:48:17 EDT (-0400)
Viewed: 35 times, last viewed: 2016-10-27 03:13:38 EDT (-0400)
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