Observation 77927: Hypogymnia physodes (L.) Nyl.
When: 2011-09-25
Who: zaca
No herbarium specimen

Notes: Looking for the dry material of a recent field trip I found a fertile specimen of Hypogymnia tubulosa, which I never saw, not even in the dozens of photos of this species I had seen in the internet. This is the leitmotiv of this observation. Unfortunately, I have a single photo took at the field which a bit unfocused. Thus I took some photos of the dry material and joined that original photo at the end of the attached photos. A photo of another fertile specimen can be seen at nasehouby.

Proposed Names

19% (2)
Eye3
Recognized by sight
84% (1)
Eyes3
Recognized by sight: soredia borne on inside of burst-open lobe tips

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Hypogymnia can be very difficult
By: Jason Hollinger (jason)
2011-10-04 13:47:32 PDT (-0700)

But I think you’ll get the hang of it in no time. On paper it sounds like H. physodes and H. tubulosa should be very easy to distinguish. In practice, they can be surprisingly hard. The key is the split lobe tips. Next time you see true H. tubulosa pay close attention to the tips. Then you’ll have it for good.

It seems to me that
By: zaca
2011-10-04 13:36:19 PDT (-0700)

the genus Hypogymnia is becoming so difficult for me as the genus Parmotrema: I can not identify a specimen!
I Hope that, based on your good explanation, will be better next time. Thanks!

H. tubulosa has soredia on the upper surface near the lobe tips
By: Jason Hollinger (jason)
2011-10-03 23:45:58 PDT (-0700)

But the lobe tips are not open. H. physodes has the lobe tips burst open and the upper surface curled back with soredia originating on the inner surface. Irwin Brodo says that apothecia are “extremely rare” in H. tubulosa and merely “rare” in H. physodes. I’ve never seen either fertile, and H. physodes is one of the most abundant lichens in the Great Smoky Mountains where I’ve studied the flora for years! “Rare” is being generous, I’d say. :)

Created: 2011-10-03 14:26:23 PDT (-0700)
Last modified: 2011-10-03 23:40:35 PDT (-0700)
Viewed: 28 times, last viewed: 2016-03-30 21:34:25 PDT (-0700)
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