Observation 87452: Punctelia Krog
When: 2009-07-05
No herbarium specimen

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Three candidates
By: Jason Hollinger (jason)
2012-02-06 23:04:54 CST (-0600)

P. bolliana – C-, pseudocyphellae inconspicuous, very wrinkled, on bark
P. hypoleucites – C+r, conidia 8-18µm, almost exclusively on bark
P. graminicola – C+r, conidia 4-10µm, on bark or (usually) rock

I’m having trouble finding morphological differences between the three. Bruce Ryans calls hypoleucites “±rugose or reticulately ridged” with apothecial margins pseudocyphellate. But it doesn’t mention lack or presence of these characters in graminicola (= semansiana). But it ddoes say that apothecia are abundant in graminicola.

I’m not willing to venture a guess without chemistry and conidia measurement, since all three are well-documented in your area (according to CNALH). We need to build up a better set of observations with solid determinations based on chemistry and microscopy, I think. I would be surprised if there are no subtle morphological clues. But I don’t know what they are yet.

Punctelia hypoleucites?
By: Andrew Khitsun (Andrew)
2012-02-06 18:17:34 CST (-0600)

Created: 2012-02-06 18:11:29 CST (-0600)
Last modified: 2012-02-06 18:15:51 CST (-0600)
Viewed: 48 times, last viewed: 2017-06-10 08:52:59 CDT (-0500)
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