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280 days of Urbpandemonium #223

 photo P1070474_zpscfbylpny.jpg
The edges of the thallus of this fungus suggest hammered metal, or at least they did back when such things were common, and lichen common names were up for grabs. Anyway, this is called "hammered shield lichen," Parmelia sulcata*

 photo P1070475_zpsibnolkce.jpg
Most of the visible part of it, and the part that we call Parmelia sulcata, is a fungus. The color comes from a green alga called Trebouxia, which is safely cared for within the flesh of the fungus, protected from drying out and blowing away. Or perhaps it is a prisoner, prohibited from living a free life apart from it's symbiont (there are free-living Trebouxia out there, apart from the lichen symbiosis).

 photo P1070476_zpsclcjetut.jpg
The fungus depends entirely on the algae living inside it, to photosynthesize and make food for both organisms.


* Little shield with grooves

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darkest_diary
Jan. 3rd, 2016 01:34 pm (UTC)
I love the colour!
( 2 comments — Leave a comment )

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