A variable hybrid, M. spicata × M. suaveolens, with characters of either parent dominating.
var. alopecuroides (Hull) Briq., Woolly Mint (Bowles Mint). This is often confused with M. suaveolens but is more robust and has a sweet scent like M. spicata. The leaves are sharply toothed and the stamens are no longer than the pink petals. This is the mint popular for peas and new potatoes and said to make the best mint sauce.
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.