Perennial herb to 1 m or more tall, hairy at first; stems sharply 4-angled in section. Leaves more or less ovate, to about 12 cm long, 6 cm wide, hairy below, margin saw-toothed. Flower clusters terminal in dense whorled heads. Flowers with corolla to about 5 cm long, tube 2-3 cm; summer.
N America
Bergamot has a range of flower colour variants:
The annual M. citriodora Lagasca is a generally smaller plant with white or pale creamy flowers.
M. fistulosa L. is also occasionally offered.
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.
Flowers white.