Temple Mint is a herbaceous aquatic plant that can
grow either emerged or fully submerged. The entire plant is covered
with glandular hairs. The stems are four-edged and are rooted in the
lower nodes. The leaves are opposite, with blades ovate-lanceshaped to
ovate-elliptic, 5-12 cm long and 2 to 5 cm wide, dark green in the
bundle (sometimes reddish in the submerged leaves) and whitish green on
the underside, the margin is whole to crenulated or wavy. The flowers
are arranged in corymbs in leaf-axils, and the flowers are purple with
small white spots on the lower lip. The fruit is an elongated capsule
of 7.5-11 mm long, with numerous discoid seeds. The plant is adaptable
to a variety of water conditions. It can be easily propagated by taking
cuttings and planting them in the substrate. Temple Mint is native to
Thailand, Philippines, cultivated worldwide. It has reportedly become
invasive in Mexico.
Identification credit: Kalyan Brata Santra
Photographed in cultivation in Malda, West Bengal.
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The flower labeled Temple Mint is ...