Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]
Found on sticks and twigs in the forest interior. No apothecia apparent on any of the occurrences.
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They could be growing on top of each other, still different lichens. And I’ve seen them do so. Remember lichens get nothing from the substrate — it’s just a place to anchor to so they aren’t blown away (grossly over-simplified no doubt). Mushrooms aren’t found side-by-side so often because they’re fighting over resources within the substrate.
(Ah, but they are the same family, if that makes it any more palatable.)
All of the photos are from the same stick, at spots a few inches apart.
Photos 1 and 2 are Parmelia, either P. sulcata or P. squarrosa according to Brodo, depending on whether it has minute finger-like corticate isidia, or coarse non-corticate granular isidia. In either case you find the same overall shape, color, with white markings on low ridges on the surface and black underside. If you cut it open and placed a drop of bleach on the medulla you’d no doubt be very edified to find a lovely C+ red reaction.
Photo 3 is Hypogymnia physodes. If you look at the full-size image you can see how many of the lobe tips have disintegrated revealing a hollow interior, and the lobe tips in the upper right side of the thallus are sort of shiny and look inflated. Inflation makes it Hypogymnia, the soredia forming from blasting open the lobe tips makes it H. physodes.
Created: 2008-10-23 21:54:17 CDT (-0500)
Last modified: 2008-10-23 21:54:17 CDT (-0500)
Viewed: 7 times, last viewed: 2017-06-05 04:01:05 CDT (-0500)