Observation 86863: Usnea strigosa group
When: 2012-01-22
No herbarium specimen

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Recognized by sight
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Recognized by sight

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Safe to call all eastern non-isidiate/sorediate Usnea this
By: Jason Hollinger (jason)
2012-01-23 19:07:45 GMT (+0000)

U. subfusca (in the mountains mostly) can be distinguished in a pinch by the blackened base and (supposedly) overall look. U. michauxii should have red spots on the cortex. U. evansii should have “short spinulose fibrils” (this will no doubt be obvious when we see it!). If it has a white medulla then it is probably U. strigosa sensu stricto. Beyond that, chemistry is required to distinguish the pink-cored speces: U. strigosa, U. endochrysea and U. cristatula (rare).

Created: 2012-01-23 03:14:00 GMT (+0000)
Last modified: 2012-01-23 18:58:52 GMT (+0000)
Viewed: 78 times, last viewed: 2016-10-24 09:48:06 BST (+0100)
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