Observation 131593: Leprocaulon microscopicum (Vill.) Gams

When: 2013-04-06

Collection location: Matinha de Queluz, Sintra, Portugal [Click for map]

Who: zaca

No specimen available

For the first time I could observe what is called the primary thallus of Leprocaulon microscopicum (in all my former observations of this species the secondary thallus with well developed pseudopodetia hid the primary thallus). At long distance it looked like a green Lepraria, but a closer observation revealed the pseudopodetia, maybe more sparse but even longer than observed before.
As in former observations the chemistry is not according to the negative spot tests mentioned by British Flora, since some yellowish reactions to K and KC are again present.


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By: zaca
2013-04-13 12:35:38 CDT (-0400)

Portugal is the producing leader of cork. A trivial application and that everyone knows is to seal the botles of wine, but that there are many others. For commercial purpose the cork is extracted every nine years. In the case of the trees from this location, they are protected by a special regime (since 1910), and there are no extraction of cork there. As a result the old trees have a great amount of cork and their thickness is very big. One of this days a will take a picture with a rule as reference and then you will see that I’m not exaggerating.

“Cork” oak!
By: Jason Hollinger (jason)
2013-04-13 10:39:29 CDT (-0400)

10 cm thick, wow! Would love to see that tree some day. :)

By: zaca
2013-04-13 04:47:51 CDT (-0400)

This was on bark as you can see in the 3rd photo. This location has very old trees, particularly of the species Quercus suber and these have very thick bark that easily can reach 10 cm.

Is this on bark??
By: Jason Hollinger (jason)
2013-04-12 21:47:59 CDT (-0400)

I thought Leprocaulon were only on rock! But now that I think about it, why not?

Created: 2013-04-09 16:30:17 CDT (-0400)
Last modified: 2013-04-09 16:30:20 CDT (-0400)
Viewed: 58 times, last viewed: 2018-11-02 14:49:34 CDT (-0400)
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