Fungi › Placynthiaceae
Blackthread Lichen
Placynthium nigrum
28 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Dark brown speck lichenVerrucaria nigrescensStudy checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 7,424 |
|---|---|
| Alaska | 6,423 |
| Canada | 448 |
| Ontario | 288 |
| Missouri | 105 |
| New York | 102 |
| France | 97 |
| Switzerland | 87 |
| Michigan | 86 |
| Wisconsin | 67 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Lichen growth formListed by a harvested source as belonging to the lichen plant group.USDA PLANTS Characteristics
Classification
| Kingdom | Fungi Including Lichens · Fungi |
|---|---|
| Phylum | Ascomycete Fungi · Ascomycota |
| Class | Common Lichens · Lecanoromycetes |
| Order | Peltigerales |
| Family | Placynthiaceae |
| Genus | Blackthread Lichens · Placynthium |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- Traits: USDA PLANTS Characteristics (U.S. Government work / public domain)
- How much to rely on each source
Remember the name next time.
Practise Blackthread Lichen with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.