Observation 79929: Collema polycarpon Hoffm.

When: 2011-10-16

Collection location: Planalto das Cezaredas, Portugal [Click for map]

Who: zaca

No specimen available

Notes:
This well developed and old specimen lived on the (calcareous) rock pieces and mosses on the top of a fence.
At the begining several possibilities appeared for the classification, namely:
C. bachmanianum, C. polycarpon and C. tenax.
The data obtained from microscopy fits very well with the data of Collema polycarpon given in CNALH:
Asci cylindrical to clavate with 8 spores;
Spores hialine often fusiform with more or less acute ends in general 3-septate, though there are some 1- or 2-septate, with the following average values: Me = 18.4 × 7 µm ; Qe = 2.6 (N=38).
According to CNALH, C. bachmanianum has bigger and more septate spores (see MO76956 for an example) and the spores of C. tenax similar in dimensions are submuriform with 1-2 longitudinal septa (see MO76181 and MO66329 for examples).

Images

175744
175745
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Proposed Names

58% (1)
Eye3 Eyes3
Used references: CNALH.
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2011-10-18 11:17:55 PDT (-0700)
Last modified: 2011-10-18 11:18:36 PDT (-0700)
Viewed: 42 times, last viewed: 2018-09-27 13:47:48 PDT (-0700)
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