Purpletop Vervain is a tall and slender-stemmed
perennial herb. It can grow to 6 ft tall and can spread up to 3 ft
wide. At maturity, it will develop a woody base. Fragrant lavender to
rose-purple flowers are borne in tight clusters located on at
branch-ends and in leaf-axil stems, blooming from mid-summer until fall
frost. The stem is square with very long internodes. Leaves are ovate
to ovate-lanceshaped with a toothed margin and grow up to 10 cm long.
Purpletop Vervain is native to tropical South America, naturalized in
Nilgiri Hills.
Identification credit: Siddarth Machado
Photographed in Nilgiri Hills, Tamil Nadu.
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The flower labeled Purpletop Vervain is ...