Observation 86603: Parmotrema A. Massal.

When: 2012-01-12

Collection location: Florida Southern College, Lakeland, Florida, USA [Click for map]

28.0° 81.0°

Who: m.cicanese (Matthew Cicanese)

No specimen available

Proposed Names

-24% (2)
Used references: Lichens of North America
28% (1)
Recognized by sight: without chemistry to verify, it might be best to leave it at just Parmotrema in this case

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Jason Hollinger (jason)
2012-01-20 02:59:37 CST (-0600)

Do you have a copy of Harris’s More Florida Lichens? Probably the best reference for your area. I don’t see any cilia in your photo (for whatever that’s worth, that’s such a useless character!), so that leaves only:

P. gardneri
P. dilatatum
P. dominicanum
P. praesorediosum
P. cristiferum
P. rubifaciens

Rule out P. rubifaciens because the soredia are too fine. P. cristiferum is really broad; P. praesorediosum is really small; the other three are in between and indistinguishable without TLC. (I’ve been told not to trust any key that claims to be able to do so!) Of course, what’s “small” and “big” is relative. :) Chemistry is your best bet. K and KC test in the medulla should distinguish cristiferum, praesorediosum, and dilatatum group readily.

Created: 2012-01-20 00:11:45 CST (-0600)
Last modified: 2012-01-20 03:01:00 CST (-0600)
Viewed: 103 times, last viewed: 2017-10-18 19:22:43 CDT (-0500)
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