Observation 12945: Lecidea mannii
When: 2008-10-15
No herbarium specimen

Notes: Crustose lichen, on granite.
THALLUS: well-developed, areolate, shiny light brown, areoles gently convex, K-
APO: sessile but appearing sunken between areoles, lecideine; disc black, lightly pruinose, around 1 mm, flat; rim prominant, black to light brownish due to dust or pruina, noticably C+ pink-red under 30x scope; epihymenium blackish-brown, not at all greenish, K-; hymenium clear; hypothecium light brownish; exciple brown with dark blackish-brown outer layer, outer parts C+ red but fleeting

(I didn’t keep a specimen of this observation, but I do have specimens from other observations.)


Apothecia and areoles, at 30×.
Apothecial section, in water, at 100×.
Apothecial section showing faint C+ red reaction in exciple.

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora
Based on microscopic features
Based on chemical features: Exciple C+ red.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2008-10-20 06:51:11 BST (+0100)
Last modified: 2008-10-20 06:51:11 BST (+0100)
Viewed: 10 times, last viewed: 2016-10-23 13:08:57 BST (+0100)