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Free Images of Lichens
Umbilicaria mammulata

Note on large files:  Very large files may be bigger than your screen.  
Right click on any portion of the image showing and chose "save as". 

 

 

 

*** Warning ***

Although there aren't many lichen that are poisonous, there are some that are high in vulpinic or usnic acid and they are toxic. 

While I have tried to link images with lichen names, I am not a specialist in this field.  I have used books and images to try to look up, categorize and name the various species.  My identification should in no way be relied upon as accurate. YOU alone are responsible for properly identifying any lichen that you may be interested in.  I have attached names to images which I merely THINK resemble the species.

I am grateful for corrections to taxonomic determinations, please contact me at FreeTiiuPix

 

Umbilicaria mammulata is commonly known as "Rock Tripe" or "Smooth Rock Tripe".  It is a foliose lichen found on boulders and rock walls.  

This species of lichen is circular and looks somewhat like a leaf.  It can grow to be up to 30 cm in diameter.  When wet, it has a leathery appearance, but becomes brittle when dry.  The "leaves" of this lichen may be flat or undulating and have smooth margins.  They may appear as brown or green with the lower surface looking black.

Rock Tripe, as the name implies, can be found on rocks attaching itself to rock cliffs and boulders of granite or sandstone by a central stalk.

 

Umbilicaria mammulata Rock Tripe lichen

Rock Tripe - 1 
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

Did you know....

that Rock Tripe is also known as "rock guts" after the Canadian French term "tripe de roche"? It is a lichen of the Umbilicaria genus.  These specimens were photographed in the boreal forest of the Canadian Shield in Northern Ontario.

 

Umbilicaria mammulata Rock Tripe lichen Ontario

Rock Tripe - 2
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

leaf like apperance lichen leather Rock Tripe

Rock Tripe - 3
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 2448 x 3264  -  For the full-size resolution of this image click here.


Rock tripe on side of granite rock.

Rock Tripe - 4
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

Lichen Umbilicaria mammulata

Rock Tripe - 5
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 3080 x 4107  -  For the full-size resolution of this image click here.

 

 

Rock Tripe Umbilicaria mammulata

Rock Tripe - 6
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Leaves of Umbilicaria mammulata.

Rock Tripe - 7
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4202 x 3150  -  For the full-size resolution of this image click here.

 

 

Rock Tripe lichen on granite cliff.

Rock Tripe - 8
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Hand holding Rock Tripe Lichen.

Rock Tripe - 9
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Rock Tripe leaf lichen on rock cliff.

Rock Tripe - 10
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Foliose lichen Rock Tripe.

Rock Tripe - 11
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4247 x 3183  -  For the full-size resolution of this image click here.

 

 

Umbilicaria mammulata

Rock Tripe - 12
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Rock Tripe in northern Ontario granite rocks.

Rock Tripe - 13
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

Take note of the change in appearance to the leaf lichen when I poured water onto the above specimens.  The lichen on the left of the image below remains dark brown in colour, while the leaves on the right absorbed the water and almost immediately turned a bright green.

 

Green Rock Tripe

Rock Tripe - 14
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 2493 x 1871  -  For the full-size resolution of this image click here.

 

 

Wet green Rock Tripe lichen.

Rock Tripe - 15
This specimen had just absorbed water.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Wet Umbilicaria mammulata.

Rock Tripe - 16
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

 

Dried Umbilicaria mammulata.

Rock Tripe - 17
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

Above & below.  Shortly after being hydrated, the lichen again becomes dry.  It should be noted that these images were taken on a particularly hot summer day.

 

Rock Tripe - 18
Photographed in Northern Ontario - Grundy Lake Provincial Park - on granite rock.

Medium - 640 x 480  Right click on above image and chose "save as".

 Large - 4608 x 3456  -  For the full-size resolution of this image click here.

 

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If you'd like to drop me a note to let me know if any of these images have been useful, I'd love to hear from you. I'm curious to see if my snapshots have been of benefit to you in some way.  Also, I'd like to hear what kind of images you'd like to see more of. 

 

 



 

 

Lovely Lichens &
Magnificent Mosses

 

 

 

 

 

 

 

Lichens - Two types of organisms living together - a fungus and an alga.  The fungus makes the body that protects the alga, and the alga provides the food for the fungus.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thoreau once wrote:  "I find myself inspecting little granules as it were on the bark of trees - little shields or apothecia springing from a thallus - such is the mood of my mind - and I call it studying.

 

 

 

 

 

 

 

 

 

 

Classification - 

Lichens were problematic for biological classification but are now classified as fungi under the genus and species of the host fungus.

 

 

 

 

 

 

 

 

 

 

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