Observation 50128: Umbilicaria krascheninnikovii (Savicz) Zahlbr.

DeBolt and McCune (1993, pp.203-204) list 14 species of Umbilicaria from Glacier NP. Two species are “very common” — hyperborea and krascheninnikovii — and three are “common” — deusta, vellea, and virginis, but note that Poelt and Nash split americana from vellea in 1993 after the DeBolt and McCune paper had appeared, so “vellea” in DeBolt and McCune would refer to one or another or both of vellea and americana. In fact, I have photos of americana from Sun Point.

DeBolt and McCune, 1993, “Lichens of Glacier National Park, Montana,” The Bryologist 96:192-204.

Poelt and Nash, 1993, “Studies in the Umbiicaria vellea group (Umbilicariaceae) in North America,” The Bryologist 96:422-430.

Umbilicaria of North America

[admin – Sat Aug 14 02:06:32 +0000 2010]: Changed location name from ‘Sun Point, Saint Mary Lake, Glacier NP, Montana, USA’ to ‘Sun Point, Saint Mary Lake, Glacier National Park, Montana, USA

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Used references: McCune and Geiser, 2009, pp.336-354

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plot thickens
By: Jason Hollinger (jason)
2010-08-11 11:11:34 PDT (-0700)

Thanks! I just located my specimens from Wellmore (around 54 degrees north) and found both species. :) U. proboscidea was most common and at higher elevation.

(By the way, we should probably ignore the adnate / stalked business from Brodo; I have proboscidea that is clearly well-stalked. But the fissuring is now starting to make sense.)

krascheninnikovii vs. proboscidea
By: Chris Parrish (kitparrish)
2010-08-11 11:00:02 PDT (-0700)

I had the same question. McCune and Geiser have a few more words of explanation in their field guide (2009, p348): “U. proboscidea is similar [to krascheninnikovii ] but has disks with concentric fissures and a more northern distribution, to some extent replacing U. krascheninnikovii north of Montana. From Montana southward in the RM [=Rocky Mountains] U. krascheninnikovii is abundant on subalpine and alpine ridges and peaks.”

What about U. proboscidea?
By: Jason Hollinger (jason)
2010-08-11 10:43:52 PDT (-0700)

According to Lichens of N Amer and notes for Ways of Enlichenment, the difference is that U. proboscidea has fissured (“gyrose”) apothecia, and U. krascheninnikovii has smooth apothecia (maybe with a central bump). (Brodo also says the former has adnate apothecia, the latter raised.) Looking at the close-up of your image, yours clearly has fissured apothecia.

I found a bunch of the same thing farther north (Wellmore Wilderness). I was absolutely sure they were proboscidea. But if McCune doesn’t even mention that species, it makes me wonder…

Ahh, now that I look more closely at Brodo’s pictures, I see I was interpreting the keys incorrectly: krascheninnikovii apothecia can be weakly fissured with at most a single prominant central fissure, while proboscidea is entirely prominently fissured. The Sharnoff photo clearly shows something identical to both yours and my specimens.

Glad that was cleared up! Please ignore this comment. :)

By: Robert Sasata (Sasata)
2010-08-10 20:44:40 PDT (-0700)

That is one cool-looking organism.

Created: 2010-08-10 20:18:19 PDT (-0700)
Last modified: 2010-08-14 06:56:06 PDT (-0700)
Viewed: 193 times, last viewed: 2018-11-06 16:32:32 PST (-0800)
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