Cladonia bellidiflora, one of several conspicuous cladonia lichens observed during a recent Northwest Lichenologist foray to a coastal dune ecosystem in Lane County, Oregon.
April 9, 2025 at 4:53 AM
Cladonia bellidiflora, one of several conspicuous cladonia lichens observed during a recent Northwest Lichenologist foray to a coastal dune ecosystem in Lane County, Oregon.
A grey form of Evernia prunastri seen today, which could be forma herinii, which is deficient in usnic acid. Growing alongside the normal greenish version.
January 29, 2026 at 7:32 PM
A grey form of Evernia prunastri seen today, which could be forma herinii, which is deficient in usnic acid. Growing alongside the normal greenish version.
Cetraria sphaerosporella is a species unique to Northwest North America where it commonly grows on whitebark pine, as seen here near Sunrise in Washington’s Mt. Rainier National Park.
March 31, 2025 at 2:56 AM
Cetraria sphaerosporella is a species unique to Northwest North America where it commonly grows on whitebark pine, as seen here near Sunrise in Washington’s Mt. Rainier National Park.
🎵 On the fifth day of December, what Cryptogam do I see?
Five Old Man's Beard 🎶
Beard lichens (Usnea spp.) are one of the most commercially important lichens owing to a chemical component (usnic acid) which has antibiotic capabilities.
Five Old Man's Beard 🎶
Beard lichens (Usnea spp.) are one of the most commercially important lichens owing to a chemical component (usnic acid) which has antibiotic capabilities.
December 5, 2025 at 8:05 PM
🎵 On the fifth day of December, what Cryptogam do I see?
Five Old Man's Beard 🎶
Beard lichens (Usnea spp.) are one of the most commercially important lichens owing to a chemical component (usnic acid) which has antibiotic capabilities.
Five Old Man's Beard 🎶
Beard lichens (Usnea spp.) are one of the most commercially important lichens owing to a chemical component (usnic acid) which has antibiotic capabilities.
Cisco usNICでlibfabric使ってましたという歴史の話を聞いている。
January 21, 2025 at 12:27 AM
Cisco usNICでlibfabric使ってましたという歴史の話を聞いている。
Lichen look innoccuous, but some species produce a compound called usnic acid that could have health benefits – if its toxicity can be neutralised.
Exploring the potential uses of usnic acid
As well as protecting lichen, this compound could have medical and cosmetic applications - if toxicity concerns can be overcome
www.chemistryworld.com
August 20, 2025 at 2:13 PM
Lichen look innoccuous, but some species produce a compound called usnic acid that could have health benefits – if its toxicity can be neutralised.
It’s a lichen, traditionally used for its antimicrobial properties, particularly against bacterial infections. Contains usnic acid, believed to have antibiotic effects, useful for treating respiratory and urinary tract infections but more research is needed to confirm its efficacy and safety.
April 6, 2026 at 1:35 AM
It’s a lichen, traditionally used for its antimicrobial properties, particularly against bacterial infections. Contains usnic acid, believed to have antibiotic effects, useful for treating respiratory and urinary tract infections but more research is needed to confirm its efficacy and safety.
Today i noticed a thallus of Hypogymnia with yellow patches.I presumed a fungal attack, however a friend has suggested Usnic acid leachate 🤔🤔
September 4, 2025 at 9:05 PM
Today i noticed a thallus of Hypogymnia with yellow patches.I presumed a fungal attack, however a friend has suggested Usnic acid leachate 🤔🤔
Orange/yellow colors in lichens indicate it contains usnic acid, a molecule supposedly used by the human body to convert consumed protein into muscle mass. Info in alt
Foraging Texas: Lichen www.foragingtexas.com/2007/07/lich...
#TheOutpost 🌱🌿🚶♂️🍄
#FungiFriends
Foraging Texas: Lichen www.foragingtexas.com/2007/07/lich...
#TheOutpost 🌱🌿🚶♂️🍄
#FungiFriends
March 9, 2026 at 5:05 PM
Orange/yellow colors in lichens indicate it contains usnic acid, a molecule supposedly used by the human body to convert consumed protein into muscle mass. Info in alt
Foraging Texas: Lichen www.foragingtexas.com/2007/07/lich...
#TheOutpost 🌱🌿🚶♂️🍄
#FungiFriends
Foraging Texas: Lichen www.foragingtexas.com/2007/07/lich...
#TheOutpost 🌱🌿🚶♂️🍄
#FungiFriends
19) Usnea (beard lichens) is another favorite genus — they produce usnic acid that is antibacterial and also helps with wound healing. It is used in herbal medicine for those purposes
August 16, 2025 at 5:33 PM
19) Usnea (beard lichens) is another favorite genus — they produce usnic acid that is antibacterial and also helps with wound healing. It is used in herbal medicine for those purposes
The snow dance. #update adding December. A good amount of snow around Beijing and the Korean Peninsula during the last months of 2023. Data by the USNIC/SEDAC bit.ly/3R45vxg
January 3, 2024 at 8:24 PM
The snow dance. #update adding December. A good amount of snow around Beijing and the Korean Peninsula during the last months of 2023. Data by the USNIC/SEDAC bit.ly/3R45vxg
There's an acid that's everywhere, from city streets to rock faces. The chemical is usnic acid and it's found in lichen – but in order to benefit from its attributes, it's going to take some work to deal with the toxicity that comes with it.
Exploring the potential uses of usnic acid
As well as protecting lichen, this compound could have medical and cosmetic applications - if toxicity concerns can be overcome
www.chemistryworld.com
August 23, 2025 at 2:02 PM
There's an acid that's everywhere, from city streets to rock faces. The chemical is usnic acid and it's found in lichen – but in order to benefit from its attributes, it's going to take some work to deal with the toxicity that comes with it.
I'm reasonably convinced now that Iceberg A23a has completely collapsed. The USNIC is no longer tracking a berg of that name. But A23k (also not listed) does however lumber on, albeit in a disheveled state. This view is from Thursday (9 April) NOAA-21 VIIRS. usicecenter.gov/Products/Ant...
April 12, 2026 at 7:24 PM
I'm reasonably convinced now that Iceberg A23a has completely collapsed. The USNIC is no longer tracking a berg of that name. But A23k (also not listed) does however lumber on, albeit in a disheveled state. This view is from Thursday (9 April) NOAA-21 VIIRS. usicecenter.gov/Products/Ant...
Tonight I tried to replicate the "on-slide" test for usnic acid published by B. McCune 2024 with adaptations. Results look promising - further evaluation is necessary. #lichen
E. prunastri has a strong red reaction. Probably second compound reacting brown?
P. grisea is negative.
L. saligna + 1/
E. prunastri has a strong red reaction. Probably second compound reacting brown?
P. grisea is negative.
L. saligna + 1/
November 6, 2025 at 8:59 PM
Tonight I tried to replicate the "on-slide" test for usnic acid published by B. McCune 2024 with adaptations. Results look promising - further evaluation is necessary. #lichen
E. prunastri has a strong red reaction. Probably second compound reacting brown?
P. grisea is negative.
L. saligna + 1/
E. prunastri has a strong red reaction. Probably second compound reacting brown?
P. grisea is negative.
L. saligna + 1/
Former USNIC represent! 👊
October 21, 2024 at 2:23 AM
Former USNIC represent! 👊
#lichen #newfoundland #naturephotography #amateurphotography #nature
Some photos of old man’s beard (Usnea) I took on a walk.
Usnea has a long history of use in things like dye and herbal medicine depending on the species, but it also contains usnic acid, which can damage your liver.
Some photos of old man’s beard (Usnea) I took on a walk.
Usnea has a long history of use in things like dye and herbal medicine depending on the species, but it also contains usnic acid, which can damage your liver.
April 7, 2026 at 5:03 PM
#lichen #newfoundland #naturephotography #amateurphotography #nature
Some photos of old man’s beard (Usnea) I took on a walk.
Usnea has a long history of use in things like dye and herbal medicine depending on the species, but it also contains usnic acid, which can damage your liver.
Some photos of old man’s beard (Usnea) I took on a walk.
Usnea has a long history of use in things like dye and herbal medicine depending on the species, but it also contains usnic acid, which can damage your liver.
Continuing theme of #lichens I see on Scottish holidays, but which aren't found at home in Suffolk: Ophioparma ventosa, a most attractive lichen with pale thallus and blood-red apothecia. Thallus can appear yellowish (with usnic acid) or greyish (without). On siliceous boulder, Bracora, Loch Morar.
September 28, 2025 at 10:43 AM
Continuing theme of #lichens I see on Scottish holidays, but which aren't found at home in Suffolk: Ophioparma ventosa, a most attractive lichen with pale thallus and blood-red apothecia. Thallus can appear yellowish (with usnic acid) or greyish (without). On siliceous boulder, Bracora, Loch Morar.
www.wildblueberrymedia.net/store/lichen...
this beautiful lichen color chart poster is giving "do you love the color of the sky?" Tumblr post
this beautiful lichen color chart poster is giving "do you love the color of the sky?" Tumblr post
Lichen Color Chart Poster — Wild Blueberry Media LLC
Colors of lichens are very important for their identification, but beginners often struggle with color terms as applied by lichenologists in descriptions and keys. For example, usnic acid gives a dist...
www.wildblueberrymedia.net
October 5, 2025 at 3:27 AM
www.wildblueberrymedia.net/store/lichen...
this beautiful lichen color chart poster is giving "do you love the color of the sky?" Tumblr post
this beautiful lichen color chart poster is giving "do you love the color of the sky?" Tumblr post
Great photo. Suprised to see this assigned to Polycauliona in the Teloschistaceae. Species Fungorum and CLH and both show the current name as Polycauliona. But blasting the existing mtSSU in GB comes out to other usnic-containing Lecanora, such as L. symmicta. Does anyone know why Polycauliona?
January 29, 2025 at 11:03 PM
Great photo. Suprised to see this assigned to Polycauliona in the Teloschistaceae. Species Fungorum and CLH and both show the current name as Polycauliona. But blasting the existing mtSSU in GB comes out to other usnic-containing Lecanora, such as L. symmicta. Does anyone know why Polycauliona?
Was Usninsäure von synthetischen Entzündungshemmern unterscheidet: Sie hemmt nicht nur Entzündungsbotenstoffe, sondern steigert gleichzeitig schützende Faktoren wie Interleukin-10 und Hämoxygenase-1.
Usnic acid alleviates inflammatory responses and induces apoptotic signaling through inhibiting NF‐ĸB expressions in human oral carcinoma cells
Usnic acid (UA) is a unique bioactive substance in lichen with potential anticancer properties. Recently, we have reported that UA can reduce 7,12-dimethylbenz[a] anthracene-induced oral carcinogenes....
analyticalsciencejournals.onlinelibrary.wiley.com
March 28, 2026 at 8:17 AM
Was Usninsäure von synthetischen Entzündungshemmern unterscheidet: Sie hemmt nicht nur Entzündungsbotenstoffe, sondern steigert gleichzeitig schützende Faktoren wie Interleukin-10 und Hämoxygenase-1.
Usninsäure bindet übrigens an das Hauptprotease-Protein von SARS-CoV-2 und hemmt damit die Virusvermehrung. Bei Long Covid persistieren Virusfragmente im Gewebe – dieser Befund macht die Hemmkapazität von Usninsäure auch Monate nach der Infektion biologisch relevant.
(+)-Usnic acid and its salts, inhibitors of SARS‐CoV‐2, identified by using in silico methods and in vitro assay - Scientific Reports
Scientific Reports - (+)-Usnic acid and its salts, inhibitors of SARS‐CoV‐2, identified by using in silico methods and in vitro assay
www.nature.com
March 28, 2026 at 8:17 AM
Usninsäure bindet übrigens an das Hauptprotease-Protein von SARS-CoV-2 und hemmt damit die Virusvermehrung. Bei Long Covid persistieren Virusfragmente im Gewebe – dieser Befund macht die Hemmkapazität von Usninsäure auch Monate nach der Infektion biologisch relevant.
I have run a quick plate (in C, and not fully developed, only in 256+385nm. I interpret the results in the way that the lichen in question (here on lanes 4+5) contains lichen substances compatible with usnic acid.
3. Sy 4.+5. L. strobilinia? 6. E. prunastri
3. Sy 4.+5. L. strobilinia? 6. E. prunastri
June 26, 2025 at 8:40 PM
I have run a quick plate (in C, and not fully developed, only in 256+385nm. I interpret the results in the way that the lichen in question (here on lanes 4+5) contains lichen substances compatible with usnic acid.
3. Sy 4.+5. L. strobilinia? 6. E. prunastri
3. Sy 4.+5. L. strobilinia? 6. E. prunastri
From "Book and Dagger"—Quote: Robert Hutchings #USNIC ~ Authoritarian regimes are prey to "intellectual pathologies" or narrow thinking; intense conformity, resistance to contrary information... #Authoritarianism is a catastrophic intellectual handicap. #Resist #Knowthings #Takecare of each other.
February 2, 2025 at 7:12 PM
From "Book and Dagger"—Quote: Robert Hutchings #USNIC ~ Authoritarian regimes are prey to "intellectual pathologies" or narrow thinking; intense conformity, resistance to contrary information... #Authoritarianism is a catastrophic intellectual handicap. #Resist #Knowthings #Takecare of each other.
My first challenge coin for my tour in at the USNIC in Bosnia. Number 40 issued. The only one I kept.
That FBI one…yikes
That FBI one…yikes
October 3, 2025 at 4:09 PM
My first challenge coin for my tour in at the USNIC in Bosnia. Number 40 issued. The only one I kept.
That FBI one…yikes
That FBI one…yikes