Observation 75790: Cladonia rangiformis Hoffm.
When: 2011-08-31
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen

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Eye3 = Observer’s choice
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By: Jason Hollinger (jason)
2011-09-09 11:36:40 PDT (-0700)

Didn’t think to look under his C. furcata page. :) I’ll have to pay closer attention next time I’m in eastern North America. C. furcata is one of our most abundant Cladonia in the southern Appalachians, displaying a bewildering range of variation. Never know: maybe part of that variation is another species! :)

Jason, maybe you noticed that …
By: zaca
2011-09-09 10:50:38 PDT (-0700)

the Alan Silverside page for Cladonia furcata gives a partial answer to your question. There are some technical arguments, but he ends saying: “The two species often grow in close proximity on dunes, when the differences become readily apparent”.
Problem: often we have only one specimen potentially belonging to one of these species.
Solution: Find the other! (joke).

As far as I could understand
By: zaca
2011-09-08 15:26:30 PDT (-0700)

from the short descriptions in the references the main difference is in the angle of bifurcation, wide in _C. rangiformis" and shorter in C. furcata. The habitats are also of different type. The chemistry can be similar, being C. furcata more variable in the K reaction. I don’t know further details, but the first one I pointed gives to the specimens a very different appearence.

Yeah, I saw Silverside’s description
By: Jason Hollinger (jason)
2011-09-08 14:15:22 PDT (-0700)

But that describes forms of furcata, too! :)

I see rangiformis occurs in Newfoundland. Maybe it’ll be included in the Hinds & Hinds New England flora. If so, they’re always good about comparing similar species.

Maybe an european species.
By: zaca
2011-09-08 14:00:40 PDT (-0700)

According to Alan Silverside, a special feature of this species is “Podetia … commonly terminating in spiky tufts with pointed, dark apices, surface of podetia appearing speckled, with groups of green algal cells on a paler background”.
I don’t think that the specimen in the other observation is similar to this one. In addition it was found in a completely different habitat.

New for me…
By: Jason Hollinger (jason)
2011-09-08 13:46:02 PDT (-0700)

Maybe the other observation is the same thing? (The one I wanted to call C. furcata.) I don’t anything about this species, or how it differs from C. furcata.

Created: 2011-09-08 13:18:21 PDT (-0700)
Last modified: 2011-09-08 13:18:22 PDT (-0700)
Viewed: 60 times, last viewed: 2016-10-26 01:02:08 PDT (-0700)
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