Observation 74968: Caloplaca holocarpa (Hoffm. ex Ach.) A.E. Wade

When: 2011-08-30

Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]

45.806696° -77.138456°

Who: Paul Derbyshire (Twizzler)

No specimen available

Below and right of the prominent Xanthomendoza hasseana that is centered in the frame. Dark yellowish apothecia, smaller, darker, and less orange than X. hasseana’s; no evident thallus, so this may be crusty and blending in with the bark behind it.

On a standing quaking aspen in Zone 14.


Focal plane is at lichen below and right of Xanthomendoza.

Proposed Names

29% (1)
Recognized by sight
31% (2)
Eye3 Eyes3
Recognized by sight: thallus hidden inside bark, orange scattered apothecia, on bark

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Paul Derbyshire (Twizzler)
2011-08-31 00:55:23 EDT (-0400)

The thallus for this one hides under the bark? How does it photosynthesize in there?

Created: 2011-08-30 22:39:39 EDT (-0400)
Last modified: 2011-08-31 00:55:32 EDT (-0400)
Viewed: 63 times, last viewed: 2017-06-29 01:30:29 EDT (-0400)
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