A hybrid, M. arvensis × M. spicata.
Variable perennial herb to 0.5 m or more tall and often suffused with red, sometimes slightly hairy. Leaves 3-6 cm long, 2-4 cm wide, ovate-lanceolate to elliptic, margin entire or with a few saw teeth. Flower clusters in well-spaced whorls. Flowers lilac. Stamens enclosed. [M. ×gentilis L.]
Source: (2002). Lavandula. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.