Anemone nikoensis; poppy anemone
A species of anemone native to Japan; the name literally means 'single-flower grass'. Used in botanical contexts.
The poppy anemone blooms white flowers in spring.
Katakana spelling is common for plant names; usually written in kana.
Kanji spelling exists but is rarely used; the word is usually written in kana.
From 一輪 (ichirin, 'one flower') + 草 (sō, 'grass, plant'), referring to the single flower on each stem.