Observation 81596: Lichen P. Micheli

When: 2011-11-06

Collection location: Stebbins Cold Canyon Reserve, Solano Co., California, USA [Click for map]

Who: Byrain

No specimen available

Growing on a mossy rock with layer of soil. The 3rd and 4th picture where growing right next to the first two, I think they are the same. Growing on the same rock as obs – 81597. I have a piece of the specimen for additional work when I have time.



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Try a couple spots if in doubt
By: Jason Hollinger (jason)
2011-11-07 08:17:04 GMT (+0000)

KC has to be done on cortex, but K can sometimes be best seen under squamules. Tips of stems sometimes have the highest concentrations, too, like the tips of reindeer lichens. For cupped species, probably best to do both sides of a squamule.

By: Byrain
2011-11-07 07:48:59 GMT (+0000)

Thanks for the comment, what part should I test? I will be a bit busy for a week or so, but will hopefully get around to it shortly after I get back.

By: Jason Hollinger (jason)
2011-11-07 06:13:16 GMT (+0000)

It’s hard to tell the color, if it’s yellowish enough to have usnic acid. C. chlorophaea could be this vivid when wet, maybe. But the erose cup margins and large squamules that are sorediate below and the corticate bases of the cups all tend to suggest C. carnola. You can try doing a K and KC test: if usnic acid is present you expect no change or just becoming more vivid in K, then adding a distinct golden hue when you add C. If no usnic, you would expect it to turn dingy brownish with K after several seconds, and just bleach whitish after you add C.

About the black apothecium: are you referring to the little black spot just a little 1 o’clock of center? Maybe a parasite? I assume you’ve ruled out dirt and bugs? :)

Black apothecia?
By: Byrain
2011-11-07 04:56:50 GMT (+0000)

In the first picture you can see a small black apothecia on the thallus, any ideas what this is? Another species growing on the lichen?

Created: 2011-11-07 04:43:58 GMT (+0000)
Last modified: 2011-11-07 05:00:42 GMT (+0000)
Viewed: 32 times, last viewed: 2017-06-10 08:41:27 BST (+0100)
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