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Kidney Lichen

Nephroma helveticum subsp. sipeanum


Dark brown to black thallus, with some white to black underside. Reddish brown apothecia with white apothecia rims. All members of this genus contain Nostoc sp. (Star Jelly is a Nostoc sp.) as the photobiont, and some species also contain green algae. I have only seen this species on sticks from recent windfall, so I suspect they grow higher up in the trees.


On Sitka Spruce twigs that fell on the ground.

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Mark Ridgway
Mark Ridgway a year ago

Well done. A very attractive species.

Machi a year ago

Thanks Mark for your suggestion! After getting an ID on this, I read that this genus is often mixed up with Peltigera, but I think the formation of the apothecia in this genus helps distinguish it from Peltigera as well as a few other subtle factors.

Mark Ridgway
Mark Ridgway a year ago

Fabulous colors. Maybe it's a young dog-lichen like Peltigera horizontalis?

Spotted by

Alaska, USA

Spotted on Sep 8, 2019
Submitted on Oct 5, 2019

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