Observation 211819: Ramalina americana Hale

Proposed Names

18% (2)
Recognized by sight
84% (1)
Recognized by sight: no striations at all, I think this is just a really well-developed americana
Based on chemical features: K- C- KC- UV-

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Some interesting comments
By: Jason Hollinger (jason)
2015-08-03 14:42:41 CDT (-0400)

from LaGreca 1999:

R. sinensis… differs from R. americana in having much wider branches and pronounced surface striations caused by ribs of dense cortical tissue in the medulla. This taxon is known to intergrade morphologically with R. americana in the midwestern United States (Hale 1978)…

Typical forms of R. sinensis are pretty clear. These striations Scott mentions are pretty obvious. But I’m equally baffled by material you’ve sent me.

Hale, M.E., Jr. 1978. A new species of Ramalina from North America. The Bryologist 81: 599-602.

LaGreca, Scott. 1999. A phylogenetic evaluation of the Ramalina americana chemotype complex based on rDNA ITS sequence data. The Bryologist 102(4): 602-618.

I struggle to distinguish between R.sinensis and R.americana in this part of the state
By: Andrew Khitsun (Andrew)
2015-08-01 21:10:46 CDT (-0400)

There is whole variety of forms and shapes and sizes, from obvious R.americana with huge umbrella-like apothecia to some hybrid-looking things with spikes instead of lobes, and everything in between. So I just go by the way of attachment: if it hangs and have big enough lobes I consider it R.sinensis. I wonder if there is surer way to distinguish.

Created: 2015-08-01 20:50:24 CDT (-0400)
Last modified: 2016-01-09 02:06:23 CST (-0500)
Viewed: 33 times, last viewed: 2017-06-20 13:04:32 CDT (-0400)
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