Ixeris dentata; a species of wild lettuce
A perennial herb in the daisy family, native to East Asia. The name literally means 'bitter greens' and it is sometimes used as a wild edible plant.
In spring, the yellow flowers of Ixeris dentata bloom along the roadside.
Ixeris dentata is sometimes made into tempura as a wild vegetable.
creeping lettuce; Ixeris stolonifera
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling; rarely used in modern writing.
Alternate kanji spelling; very rare.
The name にがな (苦菜) literally means 'bitter greens', from にがい (bitter) and な (greens/vegetable). The plant is named for its bitter taste.