When: 2017-05-26

Collection location: Braga, Portugal [Click for map]

Who: Elsa (pinknailsgirl)

No specimen available

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In the British Flora, the interpretation is that I mentioned.
By: zaca
2017-05-28 08:58:13 CST (+0800)

It may seem strange, but …
Edited: The description is due to F. Rose & O.W. Purvis.

I didn’t understand that from this description
By: Elsa (pinknailsgirl)
2017-05-28 08:40:49 CST (+0800)

“Thallus foliose, to 30-80 cm across, most often rosette-shaped, composed of long lobes, appressed on the substratum and with more or less carboard firmness, incised, apices round, upturned or erect, lobes sometimes loosely arranged, leaving windows on the substratum below, notably towards the margin. Upper surface smooth, except towards the center where it may be wrinkled, very pale grey when dry, pale grey-greenish when moist, pycnidia on top of small warts, up to 1 mm tall, lower surface very pale brown. Old and very well developed thalli are sometimes covered with coralloid-like small heaps (cephalodia) that harbour cyanobacteria (Nostoc), and in that case, the corresponding specimen are sometimes called Dendriscocaulon umhausense (Auersw.) Degel. Apothecia rare, minute volcano-shaped at first, then sessile, 0.5-8 mm diam., disc brown-red, brown-orange, exciple distinct, pale beige to grey-orange. Ascospores narrowly ellipsoid, apices gently pointed, 1-3-septate, 40-60 × 6-7 µm. Photobiont: green algae in the thallus and Nostoc in cephalodia. Medulla: C-, K+ pale yellow, KC- or KC+ dark pink, Pd-. Rare, on bark of trunks and main branches of deciduous trees, often together with Lobaria pulmonaria and Lobaria virens. This species is under severe decline and the rare specimen amenable to observation currently are rather small and poor in apothecia.*”

from http://www.lichensmaritimes.org/...

Read in this book about “mariage a trois”:

https://books.google.pt/...

Only receive that name whenever out of the usual host.
By: zaca
2017-05-28 07:14:10 CST (+0800)

Otherwise, is considered as making part of the lichen named Lobaria amplissima. If you see my observations, I found it several times associated to Physconia spp..

humm
By: Elsa (pinknailsgirl)
2017-05-28 06:34:36 CST (+0800)

Those cephalodia isn’t called Dendriscocaulon umhausense?

BRRR
By: Elsa (pinknailsgirl)
2017-05-28 05:44:30 CST (+0800)

It didn’t supposed to be these photos… thanks Zaca

I think you precipitated:
By: zaca
2017-05-27 07:27:16 CST (+0800)

It seems that these lichen live on rock. Therefore, a good candidate would be Polychidium. However, it seems that in this case could also be the isidia on the margins of a Lasallia pustulata, since some pustales are seen underneath.

Created: 2017-05-27 07:07:48 CST (+0800)
Last modified: 2017-05-28 06:12:48 CST (+0800)
Viewed: 75 times, last viewed: 2019-08-13 11:40:13 CST (+0800)
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