noun
mignonette (Reseda odorata)
Refers to the flowering plant Reseda odorata, known for its fragrant flowers. Botanical term.
庭に木犀草を植えて、その香りを楽しんでいる。
I planted mignonette in the garden and enjoy its fragrance.
From 木犀 (もくせい, 'fragrant olive') + 草 (そう, 'grass/herb'), referring to a plant with fragrant flowers reminiscent of the fragrant olive. The exact historical derivation is uncertain.