also: るりはこべ
noun
scarlet pimpernel
A small annual plant with orange or blue flowers, often considered a weed. Scientific name: Anagallis arvensis. Usually written in katakana.
道端にルリハコベが咲いていた。
Scarlet pimpernels were blooming by the roadside.
From 瑠璃 (ruri, 'lapis lazuli, deep blue') + 繁縷 (hakobe, 'chickweed'), referring to the blue-flowered variety of the plant. The exact derivation is uncertain; the spelling is conventionally associated with the plant's appearance.