Monilophytes (ferns): Leptosporangiate Ferns (true ferns): Salviniales
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Aquatic weeds can clog irrigation channels and cover lakes, threatening crops and wildlife. Read more -- Outlawed! Federal Noxious Weeds: The Aquatics.
The genus Azolla contains the smallest ferns in the world. This species was likely introduced by someone emptying their aquarium into a natural waterbody, per Center for Aquatic & Invasive Plants.
Check out EDDMapS.org to see where this has been reported.
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2015)
Azolla pinnata ssp. asiatica
Pinnate Mosquito-fern, Asian Mosquito-fern, Feathered Mosquito-fern
NameThatPlant has no pictures at this time. You might try this link: Flora of the Southeastern United States
Fern/Fern ally; Floating aquatic (the roots floating)
Habitat: Still waters, per Weakley's Flora
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
This plant is causing problems in natural areas outside its native range, according to authorities such as:
- SC Department of Natural Resources Aquatic Nuisance Species List, 2003
- SC List of Regulated Pest Plant Species, 2017
- USDA Federal Noxious Weeds, 091820
Regularly 2(3)-pinnately compound (tiny), generally equilaterally triangular in outline
TO LEARN MORE about this plant, look it up in a good book!
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".