Observation 102942: Leptogium (Ach.) Gray
When: 2012-07-21
( 3200m)
Herbarium specimen reported

Notes: This lichen was rather common in this area. I am not sure if it is several species growing together or just one.

Herbarium specimen in the Oaxaca 2012 bag.

Images

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Maria Toledo
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Etelvina Gandara

Proposed Names

0% (2)
Recognized by sight
56% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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(One of them) could be
By: Jason Hollinger (jason)
2012-08-31 12:59:33 CDT (-0500)

But there is definitely an isidiate, broad-lobed, tomentose species in there.

I think one of the wrinkled ones is anastomosing, suggesting L. phyllocarpum. Look at photos of the two species, L. phyllocarpum and L. burgessii — the lobules on the apothecia margins look totally different. They stick out and are discrete lobules on L. burgessii, but they’re all stuck together and “wadded up” in L. phyllocarpum. L. phyllocarpum seems to swell up more when wet. Also, L. burgessii has tomentum below, and L. phyllocarpum does not. At least some of the material in these photos does not have tomentum below, while other material does. I think it’s entirely possible that both are present!

Can’t it be Leptogium burgessii?
By: zaca
2012-08-31 12:06:55 CDT (-0500)
Crazy
By: Jason Hollinger (jason)
2012-08-31 03:13:10 CDT (-0500)

The way I’m reading this, there are at least three species of Leptogium here, including at least L. phyllocarpum (the mounded one with the apothecia surrounded by “wadded up” thalline margins), something similar to L. saturninum (the smooth one with isidia and white tomentum underneath), and… something like L. platynum?? (smaller wrinkled lobes with apothecia and no(?) tomentum below).

I’ve never seen L. saturninum with apothecia, but the Sonoran Flora says it does have them (rarely) and they are sessile when it does. L. burnetiae has stipitate apothecia (also rare), so it is out.

(Also, there is a Heterodermia in the photo. H. erinacea maybe.)

Created: 2012-07-26 12:29:54 CDT (-0500)
Last modified: 2012-11-01 17:34:22 CDT (-0500)
Viewed: 66 times, last viewed: 2015-07-30 16:13:16 CDT (-0500)
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