Observation 208465: Xanthoria tenax L. Lindblom
When: 2015-06-30
(35.3892° -119.9794° 701m)
Who: J-Dar
Herbarium specimen reported

Notes: Small adnate thallus on ornamental fig tree bark, greenish-yellowish-orange appearance when dry, green when wet, viewed close-up the orange tissue is newer thallus or budding apothecia and older cortex tissue yellow-grey; variously pruinose throughout, thallus with a bumpy surface. Thallus lobate, described as fan-shaped which appears right, lower surface without cortex, white medulla visible. Thallus cortex K+P. Soredia and isidia absent, apothecia common, disc orange, thalline margin concolorous with thallus, pruinose when young.

This site is an old abandoned ranch house in an arid grassland setting, far from anywhere.

Images

537281
533757
Pruinose apothecia
533758
Thallus lobes
533759
Young thallus, <1cm diameter
533760
wet
533761
dry
533762
533763
Thallus lobe underside
533764
Thallus underside
533765
Thallus underside (bark at bottom)
533766
Abandoned ranch house
537280
537282

Proposed Names

61% (2)
Eye3 Eyes3
Used references: Nash Sonoran Flora

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
Nice, thanks!
By: Jason Hollinger (jason)
2015-07-12 05:42:50 MSK (+0300)
Added “in situ” Photos
By: J-Dar
2015-07-12 05:38:08 MSK (+0300)
Better hold on to this too
By: Jason Hollinger (jason)
2015-07-02 10:01:20 MSK (+0300)

It will add yet one more reason to visit some day! :)

I can send you some
By: J-Dar
2015-07-02 09:41:24 MSK (+0300)

It’s rather abundant on trees at this spot, and if I looked around I’m sure there are other locations in the vicinity. The thallus underside has dark areas that I couldn’t tell if it was cortex material or wood, but it seemed to be pretty much missing the lower cortex.

Exciting, I’ve never found this species
By: Jason Hollinger (jason)
2015-07-02 09:35:44 MSK (+0300)

Only thing I can think to worry about at all, since it’s so closely-adnate, is a normally-saxicolous Caloplaca sp., but I’m inclined to support your id.

Created: 2015-07-02 08:11:05 MSK (+0300)
Last modified: 2015-07-12 05:39:22 MSK (+0300)
Viewed: 54 times, last viewed: 2016-10-22 17:40:08 MSK (+0300)
Show Log