 The flowers of this entire genus are like, most mints, two-lipped forming a tube with five sepals and the stamens enclosed within the zygomorphic petals.The bracts in the inflorescence have marginal spines, thus the basis of the common name 'thornmints'.All "Acanthomintha" have the upper three lobes of its calyx acuminate and the lower two lobes oblong in shape; furthermore, all Acanthomintha corollae are funnel shaped and white with occasional tinting of purple.