Observation 66326: Lunularia cruciata
When: 2011-04-19
Who: zaca
Herbarium specimen reported

Notes: Intriguing!
When I first saw the thallus of this lichen I thought it was a sterile species of Cladonia. But the size, shape and consistency of the lobes / squamules was totally different from what I’ve seen in that genus. After examining the photographs, I noticed that the lobes are actually very consistent, and each is divided into many sections each with a hole at the center, which can be an ostiole, or simply a hole (pseudocephalodia?). Also very intriguing is the existence in some lobes of a kind of bags that contain formations within a shimmering green, different from the rest of the thallus. Yet another strange thing can be seen at the bottom of the right side in the first picture: is this a preliminary stage of a fruit body?.
From the research I did, I found some species of Peltigera vaguely similar, and may even be a greenmorph of a Sticta, but again the resemblance is vague, since, in general, their lobes are not so consistent and are multiply bifurcated into branches.

Images

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143053
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Specimen collected
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Section of a lobe
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Rhizines
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Upper surface – magnification 40x
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Rhizines – magnification 40x

Proposed Names

-55% (5)
Recognized by sight
Based on chemical features: All chemical reactions negative.
58% (1)
Eye3 Eyes3
Recognized by sight: ID by else

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks, else, for the identification.
By: zaca
2011-04-26 18:24:46 BST (+0100)
Lunularia cruciata – a LIVERWORT
By: else
2011-04-26 18:18:41 BST (+0100)

not a lichen, but a liverwort – named after the shape of the structures on top of the thallus in which gemmae (vegetative propagules) are formed.

Created: 2011-04-26 17:57:34 BST (+0100)
Last modified: 2011-04-26 23:00:07 BST (+0100)
Viewed: 68 times, last viewed: 2016-10-25 00:42:08 BST (+0100)
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