Observation 217927: Buellia leptocline (Flotow) A. Massal.
When: 2015-10-03
Who: zaca
No herbarium specimen

Notes: Growing on siliceous rock.

Images

561696
561697
561698
561699
Chemical reactions.
562330
Microscopy: Apothecial sections;
562331
Microscopy: Asci;
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Microscopy: Spores.
562915
Microscopy: KOH on section.

Proposed Names

29% (1)
Recognized by sight
58% (1)
Eye3 Eyes3
Recognized by sight
Used references: British Flora
Based on microscopic features
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
More data added.
By: zaca
2015-10-10 06:19:19 CDT (-0500)

Some features important for the classification:
- No oil drops on the hymenium;
- K reaction on section: predominantly yellow with some orange-red tones on epithecium and exciple, and predominantly orange-red on the hypothecium;
- Medulla (extracted from the bottom of an apothecium) I+ violet; there was no pre-treatement with KOH, the lugol was droped directly in the water mount.

I had no sample of thallus and collected only some apothecia. Using the “Key to Amandinea and Buellia” in the British Flora, the above mentioned features, without the formation of red crystal in any part of the section permit to rule out
Buellia subdisciformis. On the other hand, the absence of oil drops on the hymenium and the I positive reaction of medulla (the Bristish Flora says “I+ blue” and I observed “I+ violet”, thus interpreting it as a positive reaction), lead to the
group of species: B. leptocline and B. spuria. I will go for the first of these species, since there was a K+ yellow-orange reaction on exciple (shoud be K- in B. spuria) and, on the other hand, the dimensions of the spores are more in
accordance with that species; the values given in the British Flora are:
B. leptocline: 12-16(-18) x (6-)7-8.5(-11) µm;
B. spuria: 9-15 × 4.5-6.5 µm.

Microscopy added.
By: zaca
2015-10-08 15:04:05 CDT (-0500)

Spores:
(11) 11.9 – 14.4 (16.9) x (6) 6.2 – 7.9 (8.8) µm
Q = (1.6) 1.7 – 2.1 (2.3) ; N = 27
Me = 13.2 × 6.9 µm ; Qe = 1.9 .

Created: 2015-10-06 15:39:18 CDT (-0500)
Last modified: 2015-10-10 06:20:31 CDT (-0500)
Viewed: 69 times, last viewed: 2016-10-24 03:40:29 CDT (-0500)
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