Observation 66291: Punctelia hypoleucites (Nyl.) Krog
When: 2010-10-17
No herbarium specimen

Proposed Names

31% (2)
Recognized by sight
56% (1)
Recognized by sight: gray with prominant white spots
57% (1)
Eyes3
Recognized by sight: On quartzite

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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ignore apothecia
By: Jason Hollinger (jason)
2011-04-26 15:37:15 PDT (-0700)

Doesn’t matter how rare they’re supposed to be, when they occur, they can be perfectly abundant.

I’m interested in seeing your new material, though! I’m definitely going to look more carefully at isidiate Punctelia for a while…

By: Chris Parrish (kitparrish)
2011-04-26 14:57:35 PDT (-0700)

Those photos of Punctelia missouriensis by Beeching on discoverlife.org (type “Punctelia” into the Search box) are quite interesting because a few days ago I found a whole tree trunk full of abundantly fertile, isidiate Punctelia here in Sewanee, TN. My best guess was Punctelia rudecta, but apothecia are advertised to be uncommon in that species. As far as I can tell from the small photos on discoverlife, these local thalli seem to match Beeching’s specimens pretty well.

Punctelia missouriensis keys out twice in the latest key to Punctelia of North America by Lendemer and Hodkinson 2010. In the “thallus isidiate” branch of their key, they say

15a. Isidia tall, cylindrical to branched; very common … P. rudecta
15b. Isidia short and squamiform, (except in central North America), restricted to pseudocyphellae and resembling heaps of corticate soredia; less common … P.missouriensis

and in the sorediate branch of the key, they say “Lower surface pale-brown … saxicolous …” and

Soredia coarse and isidioid, squamiform and partially corticate, few per soralium; central and eastern North America … P. missouriensis

This TN and GA material might fall into the “except in central North America” category.

Reference:
Lendemer and Hodkinson, 2010, A new perspective on Punctelia subrudecta in North America: previously-rejected morphological characters corroborate molecular phylogenetic evidence and provide insight into an old problem. The Lichenologist 42(4): 405-421.

Punctelia quandry…
By: Jason Hollinger (jason)
2011-04-26 12:40:15 PDT (-0700)

I’d guess either P. rudecta or P. missouriensis, I’m not clear on the proper id of material like this with lumpy isidia-like structures; typical rudecta has tiny fine cylindrical isidia. According to Bruce Ryan’s keys missouriensis should be sorediate(?!) yet photos on discoverlife shows something just like this (I trust Sean Beeching’s ids), and the photos on wisconsinfungi show something apparently without either soredia or isidia or lobules (probably should be bolliana or graminicola I’d say). What a mess. All I know is I’ve seen material like this, and I’ve never been comfortable calling it rudecta.

Created: 2011-04-25 18:49:05 PDT (-0700)
Last modified: 2015-05-30 16:17:20 PDT (-0700)
Viewed: 66 times, last viewed: 2016-04-04 18:48:12 PDT (-0700)
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