Adenostemma lavenia; swamp daisy
A species of flowering plant in the Asteraceae family, found in wetlands. The Japanese name literally means 'swamp radish'.
Adenostemma lavenia is a perennial herb that grows in wetlands.
In the marshes around here, you can see the white flowers of Adenostemma lavenia in summer.
Katakana spelling is the usual written form for this plant name.
Kanji spelling is rare; the plant is usually written in kana.
The name is a compound of 沼 (numa, 'swamp') and 大根 (daikon, 'radish'), referring to its habitat and possibly the shape of its leaves or roots. The exact derivation is uncertain.