Observation 103889: Peltigera elisabethae Gyelnik

When: 2012-07-17

Collection location: Bayshore County Park, Door C-ty, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

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Recognized by sight
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I’ve seen the cracking of exposed forms like this before
By: Jason Hollinger (jason)
2012-08-18 23:20:42 PDT (-0700)

Looking around, I can’t find any photos of P. rufescens or P. malacea doing it – both are frequently found in very exposed locations – but I do have a P. elisabethae from Alberta kinda doing it (observation 49981):

Hmmm, I wonder if that’s why P. elisabethae is so prone to regeneration lobules. All Peltigera species can produce lobules along cracks. Species which are prone to cracking are maybe the ones which are known for lobules, like P. elisabethae, P. praetextata, P. phyllidiosa. It’s a thought…

Found some regeneration lobules
By: Andrew Khitsun (Andrew)
2012-08-18 20:02:09 PDT (-0700)

Rhizines are stubby tufts in concentric rings. So I’m renaming this one to P. elisabethae. Still can’t figure out the surface cracking…

No veins…
By: Jason Hollinger (jason)
2012-08-09 22:21:01 PDT (-0700)

Worth considering both P. malacea – densely tomentose on upper surface, which I don’t see here – and more promising, P. elisabethae – hairless on upper surface, thick (esp. in exposed situation like this), stubby thick rhizines that tend to be arranged in concentric rings near the margins, with abundant regeneration lobules in most specimens. If you find an apothecium, P. elisabethae should have flat “horizontal” apothecia like P. horizontalis, not the usual “hands up!” or saddle- or finger-shaped apothecia of P. rufescens.

Can’t figure this one out.
By: Andrew Khitsun (Andrew)
2012-08-04 19:46:44 PDT (-0700)

It looks like Peltigera rufescens – slate gray color, upturned lobe tips, tomentum towards lobe tips, grows in semi-open park setting. But what’s with the cracking of thallus? Lower sufrace felt-like and brown centrally with white lobe tips. Rhizines are scarce short tufts. I can hardly see any veins.

Created: 2012-08-04 19:39:54 PDT (-0700)
Last modified: 2012-08-18 20:08:46 PDT (-0700)
Viewed: 88 times, last viewed: 2017-06-13 08:25:56 PDT (-0700)
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