Observation 21732: Toninia alutacea (Anzi) Jatta
When: 2009-05-28
Herbarium specimen reported

Notes: Found only a few thalli in shetered niche of limestone cliff at the top of the cliff in an exposed location, with Toninia sedifolia and Psora himalayana.

SQUAMULES somewhat convex (but much less than T. sedifolia), very heavily and coarsely white pruinose all over, K-, C-, KC-
MEDULLA white, K-, C-, KC-
APOTHECIA appressed, flexuous, black beneath heavy powdery white pruina, strongly marginate
EPIHYMENIUM gray, K+ violet (faint but unmistakable - clearer in person than in the photo)
HYPOTHECIUM pale yellowish-brownish, K

SPORES hyaline, smooth, mostly 3 septae, very narrowly fusiform, 26-46 × 3.2-4.4 µm (avg 34 × 3.9 µm) (Q=6.5-13, avg 8.9) (N=20)

Images

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apothecia under pruina
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Apothecial section in water at 100×.
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Apothecial section in K at 100×.
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Spores in water at 1000×. It took hours with a tweezer to get those spores lined up just so… on Photoshop. :)

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Lichen Flora of the Greater Sonoran Region, Lichens of North America
Curtis Bjork and Trevor Goward found this unlikely, but I think the K+ violet reaction in the epihymenium and the long 4-celled spores are unambiguous.
Based on microscopic features
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-06-05 18:07:33 CDT (-0400)
Last modified: 2009-06-05 18:07:33 CDT (-0400)
Viewed: 29 times, last viewed: 2016-05-07 07:32:50 CDT (-0400)
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