Posts Tagged ‘blister lichen’

A Foliose Lichen

I find all kinds of lichens when I pick up sticks in the yard.

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The larger lichen with the leafy appearance is a foliose lichen.


Blister lichen, with the dark disc-shaped fruiting bodies, is also a foliose lichen. The leafy part shows better in the upper right of the picture.

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The black “hairs” along the edges of the lichen are called “cilia.” I seldom see them on lichens.

A Small Snow Cave

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A small snow cave partially covers ed blister lichen (Physcia stellaris)  growing on a limb in our dawn redwood tree. It’s also called a star rosette lichen. It’s a foliose lichen — a leafy looking lichen (say that three times fast). They reproduce by spores, which is the black in each disc.

A New Lichen

One of my lichen books calls these blister lichens. The other one calls them star rosette lichens.

Their scientific name is Physcia stellaris.


Black is the most common blister lichen I find here in southern Illinois.


Some blister lichens have brown discs,

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and others have green.

The discs are called apothecia and are where the spores are produced.

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Then I found a blister lichen with gray discs in the backyard yesterday.

Now I wonder what other colors that I might find?

A Fungus and a Lichen

Before I get started on this blog, I want to say that I’m a highly visual person. I find photography quite frustrating! For some reason I just don’t understand or retain most of the information.


I was working in the yard this morning and took this picture of the mushroom and lichen with my Canon PowerShot. The sun hadn’t come around yet to hit the subjects.


I took this picture on January 9th and didn’t get around to starting the blog until this morning (14th). Obviously, this picture was taken in the sunlight. The colors in this and the above picture differ so much. I don’t use the automatic setting, because the pictures come out too light.


So, I took another picture after the hazy sunlight moved over to this side of the branch. All three of these pictures were cropped.


This shows the pores on the underneath side of the mushroom.

 I’ve had no luck identifying these mushrooms.

The lichen is a blister lichen (Physcia stellaris).

Ice Encrusted

Luckily, a recent ice storm didn’t produce the amount that was forecast.

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A thin layer of ice encrusted most surfaces.

While walking a loop around the backyard, a short dead tree with lots of lichens caught my attention. One of my lichen books calls this a blister lichen, and my other one calls it a star rosette lichen. It also goes by Physcia stellaris. It is commonly found on deciduous trees.

 A lichen is actually two plants living in a symbotic relationship — a  fungi and algae. The fungus provides a moist habitat for the algae to live in, and it also supplies the algae with nutrients as it decomposes the surface it’s growing on.

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Nature has such artistic abilities.

Learning Lichens

 My recent interest has included lichens.

I have two books on lichens — Walk Softly Upon the Earth, published by the Missouri DOC, and Lichens of the North Woods by Joe Walewski.

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The Missouri book has the name blister lichen for this common lichen. Walewski’s book calls it a star rosette lichen.

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 Both use the scientific name Physcia stellaris.

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Spores develop in the disc-shaped fruiting bodies. It commonly grows on deciduous trees.  It’s a foliose lichen, meaning it looks leaflike and has only a few points of attachment to the surface.

 Very few scientific names make it into my permanent memory. Images easily become a visual memory.

That being said, I plan to call this one blister lichen.