Observation 67543: Verrucaria Schrad.

When: 2011-05-14

Collection location: Planalto das Cezaredas, Portugal [Click for map]

Who: zaca

No specimen available


Proposed Names

29% (1)
Recognized by sight: Much darker than the usual Verrucaria nigrescens.
Used references: lastdragon
58% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
The websites that I visited in the meantime
By: zaca
2011-05-17 15:59:48 PDT (-0700)

gave the same information that you mentioned from “Lichens of North America”.
Thanks anyway, Jason.

Sorry, I can’t confirm that
By: Jason Hollinger (jason)
2011-05-17 15:52:13 PDT (-0700)

Only reference I have is in Lichens of North America, and that just says “mainly on siliceous rocks in the upper tidal zone continuing into the spray zone”. Certainly doesn’t sound like your locality, but given the word “mainly”, it doesn’t rule anything out! :) (It also mentions “a black Verrucaria common on dry limestone is V. nigrescens”.)

No, it is 2-3 km from the coast.
By: zaca
2011-05-17 15:37:42 PDT (-0700)

If V. maura is exclusively found right above the waterline, maybe this a darker form of V. nigrescens.

Is this right above the waterline?
By: Jason Hollinger (jason)
2011-05-17 15:04:35 PDT (-0700)

I think V. maura is exclusively found there.