Observation 329298: Usnea Dill. ex Adans.

Found on fallen stick in mixed riparian woodland of pine, oak and fir. Medulla 2 layered and K-, numerous fibrils on back side of apothecium. The secondary branches are quite variable as characteristic of U. arizonica(=intermedia) but that species doesn’t have fibrils on back side of apothecium.


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Used references: MO
31% (2)
Recognized by sight

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I was basing my suggestion on the impressive density of fibrils
By: Jason Hollinger (jason)
2018-08-25 01:14:08 CDT (-0400)

and irregular (not perfectly cylindrical) branches. I used the Sonoran Flora (vol. III). Pretty hard to use without a specimen in hand, but fortunately you can rule out many species for various reasons (range, etc.), and there aren’t that many fertile species in the key to begin with.

Thanks Jason,
By: Cindy Trubovitz (Trubo)
2018-08-25 00:32:14 CDT (-0400)

Looking closer at the specimen it seems to be a very good fit and I added to the notes more I.D. characteristics. Since I don’t have a lichen key for that area but searched online and compared to other Usnea found in that area and agree that parvula could be likely. Thanks:)