Observation 21733: Toninia sedifolia (Scop.) Timdal

When: 2009-05-28

Collection location: Vavenby Limestone South, British Columbia, Canada [Click for map]

Who: Jason Hollinger (jason)

Specimen available

This was common though not as abundant as Psora himalayana on limestone cliff, pebbles and among moss, mostly in exposed locations.

SQUAMULES very convex, very strongly and coarsely white pruinose, K-, C-, KC-
APOTHECIA laminal, black, mostly epruinose, soon very convex and large, appearing inset between squamules
EPIHYMENIUM gray, lightening somewhat in K (should have been K+ violet?), POL-
HYPOTHECIUM brown, K-, POL+ faintly whitish
SPORES fusiform, tapering to one end, simple (oil drops are obscuring what could be 1-3 septa), hyaline, 17-19 × 3.4-4.4 µm (Q=3.8-5.7) (N=4)


old apothecium
young apothecia
Apothecial section in water at 100×.
Spores in K at 1000×.

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Lichen Flora of the Greater Sonoran Region and Lichens of North America
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 18:13:18 CDT (-0400)
Last modified: 2009-06-05 18:13:18 CDT (-0400)
Viewed: 129 times, last viewed: 2018-08-14 03:26:16 CDT (-0400)
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