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About Hypogymnia imshaugii Krog | Google Images | Distribution Map
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Observation: Hypogymnia imshaugii Krog (7351)

When: 2008-04-15
Collection location: Slate Creek Rd, Humboldt Co., California, USA [Click for map]
Who: John Harlan (harlanx6)
No herbarium specimen

Notes: Notice the fruiting bodies, like little 1/4" mushrooms.

Proposed Names:   Propose Another Name

Proposed Name User Community Vote
  harlanx6   -73% (3)  
Recognized by sight
  nathan   -62% (2)  
Recognized by sight: Looks like the tube lichens I’ve seen before in Humboldt Co.
Used references: In Lichens of North America by Brodo, Sharnoff & Sharnoff the photo of this species seems like a pretty good match. It also discusses H. imshaugii. The only reliable difference is a chemical reaction (PD- for H. inactiva), but H. inactiva seems more delicate based on the photos and it tends to be more coastal.
  jason   91% (2)   Eyes
Recognized by sight: John tells me the medullary ceiling is white.

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Eye = Observer’s choice Eyes = Current consensus

Comments:   Add Comment

Created: 2008-04-25 10:36:07
By: Jason Hollinger (jason)
Summary: H. imshaugii group versus H. inactiva

These are notoriously hard to differentiate. Aside from the medullary PD reaction (nearly always PD+o/r in H. imshaugii group), the other difference is H.imshaugii group has a white interior throughout, while H. inactiva darkens toward the center. Trevor Goward assures me this is foolproof. Inland you can rule out H. inactiva with 90% confidence, but at the coast it can be either.

 15884

Observation Created: Mon Apr 21 14:32:38 -0700 2008
Last Modified: Mon Apr 21 14:51:53 -0700 2008 by John Harlan (harlanx6)
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Images:

12796
Hypogymnia imshaugii Krog (12796)

12797
Hypogymnia imshaugii Krog (12797)

12798
Hypogymnia imshaugii Krog (12798)