Observation 190534: Usnea Dill. ex Adans.

When: 2014-11-01

Collection location: Pantiacolla Lodge, Manu Biosphere Reserve, Madre de Dios, Peru [Click for map]

Who: Susanne Sourell (suse)

No specimen available

Mirador Shintoya

Proposed Names

29% (1)
Recognized by sight
56% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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I think we can be sure this is Usnea
By: Jason Hollinger (jason)
2014-11-30 15:16:21 CST (-0600)

But if this were in northwestern North America, I’m not sure I’d rule out Alectoria. And if it were Chile, we’d have to consider Protousnea. So it’s possible there are some superficially similar genera in your area. The critical character is – something you can check for easily in the field – Usnea has a rubbery central cord (the “axis”). Take a strand of the lichen and stretch it gently until it just starts to break. If it’s Usnea the cortex will break first revealing the stretchy axis still intact inside. No other genus has this property.

Created: 2014-11-29 14:19:02 CST (-0600)
Last modified: 2014-11-30 15:08:03 CST (-0600)
Viewed: 21 times, last viewed: 2017-06-19 10:23:27 CDT (-0500)
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