Observation 95958: Hypogymnia physodes (L.) Nyl.

When: 2012-06-01

Collection location: Pine Grove, Nova Scotia, Canada [Click for map]

Who: Jess (Cosham)

No specimen available

May be a mixture of H. krogiae and H. physodes? Found on the tips of branches of a fallen tree, near H. tubulosa and other species (i.e. Parmelia).

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Hinds & Hinds New England Flora
By: Jason Hollinger (jason)
2012-06-01 16:43:28 CDT (-0500)

H. physodes and H. incurvoides both also have pycnidia at the tips in their photos. Is that what you mean? I can’t find mention of maculae, either.

Not sure, but…
By: Jess (Cosham)
2012-06-01 16:07:29 CDT (-0500)

I was on the fence for this reason… I know that H krogiae isn’t sorediate, but isn’t speckling at the end of the lobes characteristic for the species?

Based on the branching pattern?
By: Jason Hollinger (jason)
2012-06-01 13:21:06 CDT (-0500)

I remember reading that H. krogiae can rarely be sorediate like H. physodes, but has anyone ever seen a sorediate krogiae? In my experience krogiae has longer branches than this, and that don’t splay at the tips like this. They both branch dichotomously. I have a photo somewhere of (fertile) krogiae growing next to physodes and the difference is quite striking… here: observation 96011.

Created: 2012-06-01 05:12:24 CDT (-0500)
Last modified: 2012-06-01 13:22:07 CDT (-0500)
Viewed: 34 times, last viewed: 2017-06-13 01:28:19 CDT (-0500)
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