Discovery of Aconitum haridasanii (Ranunculaceae), a new species from Arunachal Pradesh, India

Aconitum haridasanii, a new species from Tawang, India, is described and illustrated. This new species differs from its allied species Aconitum spicatum in having a taller and flexuous stem, pale yellow to whitish flowers in a shorter few-flowered inflorescence, densely pubescent shorter pedicels, bract shorter than pedicel, shorter sepals, longer petals, and only 3 carpels. Threat assessment was undertaken for the species following IUCN criteria (IUCN 2017 version 13) and the species was classified as Critically Endangered.