Observation 199119: Lasallia Mérat

When: 2015-02-15

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

Who: zaca

No specimen available

I went to the rock where I found the Lasallia of observation 196802 and make a more detailed analysis looking for other fertile specimens. For my surprise, I found many more as the photos attached show. I just made the microscopy of a new specimen and my previous data were confirmed (later on I will upload some photos). The question is: the dimensions obtained for the spores are within those given in the reference for L. hispanica in what refers to the length, but the width those not:
I got for the specimen of observation 196802:
Me = 54.1 × 34.8 um; Qe = 1.6
and the range for Lasallia hispanica given in the reference is:
40-65 x (17-)20-25 um.
On the other hand, I search for information about the spores of L. pustulata, the other species known to exist here and by far the most common, with no success. At the end, this could be the fertile version of the latter species, that though rare may exist here.
I just check that the British Flora gives the dimension for the spores of l. pustulata:
28-70 × 18-34 um.
This means that I got for the average of the spores width of my specimen the maximum given there. Anyway closer than for L. hispanica.
Here are the dimension of the spores for the specimen in this observation:
(40.4) 43.5 – 69.8 (76.8) x (19) 27.6 – 42.1 (43.2) µm
Q = (1.1) 1.4 – 2 (2.2) ; N = 43
Me = 57.6 × 34.7 µm ; Qe = 1.7.


Microscopy: Hymenium;
Microscopy: Asci;
Microscopy: Spores.

Proposed Names

87% (1)
Used references: L. G. Sancho and A. Crespo, Lasallia hispanica and related species, Lichenologist 21 (1): 45-58, 1989.

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Add Comment
Microscopy added.
By: zaca
2015-02-19 05:59:00 CST (-0500)