noun
garden stock; gillyflower
Refers to the flowering plant Matthiola incana, commonly called stock or gillyflower. The katakana form アラセイトウ is standard.
庭にアラセイトウが咲いている。
Garden stocks are blooming in the garden.
The reading あらせいとう is thought to derive from Portuguese 'alecrim' (rosemary) or Spanish 'alhelí' (wallflower), but the exact origin is uncertain. The ateji 紫羅欄花 is a phonetic rendering.