Observation 97327: Rhizoplaca subdiscrepans (Nyl.) R. Sant.

When: 2012-06-03

Collection location: Governor Dodge State Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available



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Specimen confirmed by Jim Bennett
By: Andrew Khitsun (Andrew)
2013-12-29 05:44:31 GMT (+0000)

The main species here was confirmed, but the rest of the medley is still under question :-(

Is the green algae?
By: Jason Hollinger (jason)
2012-06-20 08:29:12 BST (+0100)

Really narrow-lobed things tend to be filled with algae because there’s no room for anything else! But I can’t explain the white lower surface, no matter how creative I am. Real stumper.

I’m trying to disentangle
By: Andrew Khitsun (Andrew)
2012-06-19 02:59:48 BST (+0100)

The brown tangled thing is not looking like Phaeophyscia – lower surface white. It has K- on cortex and K- on medula. Speaking of which – upon breaking a lobe off it reveals medula that looks green, not white. Strange.
White pillowy thing looks similar in structure to darker Rhizoplaca lobules. Both are negative in K and C.

You’re right, bizarre
By: Jason Hollinger (jason)
2012-06-17 08:22:17 BST (+0100)

No way the white pillow-shaped squamules are the same as the Rhizoplaca subdiscrepans. But what is it?? The brown tangled thing… looks most like Pseudephebe… no way… a Phaeophyscia maybe? P. sciastra? Is the white pillowy thing always growing on top of something else? Weird.

Can someone tell me what’s going on here?
By: Andrew Khitsun (Andrew)
2012-06-15 01:14:15 BST (+0100)

It seems to me the main player here is Rhizoplaca subdiscrepans, showing orange or orangish apothecia of different sizes and shapes and greenish-light brown thallus. There are also white squamules of something else (or maybe it’s still R.subdiscrepans?) sitting on top of the Physcia – like lichen with very thick pillow of intertwined darkish branches (cortex & medula K-)

Created: 2012-06-15 01:00:13 BST (+0100)
Last modified: 2013-12-29 05:42:30 GMT (+0000)
Viewed: 57 times, last viewed: 2018-02-23 01:49:39 GMT (+0000)
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