Observation 13470: Peltigera membranacea (Ach.) Nyl.
When: 2008-11-01
No herbarium specimen

Notes: Broadly lobular brownish lichen with black rhizines on the underside, which also has many brown veins as well (see upper right-hand of photo). Edge of lobes have yellowish to reddish-orange fruiting structures. Lobes are up to 5cm wide.

Proposed Names

-11% (3)
Recognized by sight
35% (2)
Used references: provisional keys for Ways: shiny, smooth, broadly blistered, margin not crisped, brown apothecia, pointed rhizines
70% (1)
Recognized by sight: The soil-dwelling habit, the color, and the ecorticate, rhizinate lower surface all make it clear that this is Peltigera. The pattern of the upper surface, the lobe tips that fold over, and the lower surface (that does not have a white naked zone before the veination/rhizines begin) indicate that this is probably P. membranacea.
Used references: ‘Lichens of North America’ has a pretty good overview of NA Peltigera species (there are more being defined all the time, and there is certainly much more taxonomic work to be done to sort out this genus). Take a look at the Peltigera section of the North American Lichen Checklist to find some of the sources that describe the taxa not treated by Brodo et al. (2001): http://www.ndsu.edu/instruct/esslinge/chcklst/chcklst7.htm

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
An LBM, too
By: Paul Derbyshire (Twizzler)
2008-11-03 00:03:33 PST (-0800)
By: Jason Hollinger (jason)
2008-11-02 23:52:59 PST (-0800)

The bright green one on the left covered with black dots.

Created: 2008-11-02 22:29:18 PST (-0800)
Last modified: 2008-11-02 22:29:18 PST (-0800)
Viewed: 49 times, last viewed: 2016-10-21 20:47:08 PDT (-0700)