New Begonia Species Discovered in Arunachal Pradesh

Researchers from the Mumbai-based Thackeray Wildlife Foundation discovered Begonia siangensis in Arunachal Pradesh’s Upper Siang district. S. Kishwan, T. U. Thackeray and N. V. Page conducted the botanical examinations that established it as a species new to science.

Habitat and identifying features

The species was found beside a shaded, moisture-rich mountain stream between Bomdo and Jengging, at about 600 metres above sea level. Fieldwork and specimens collected in 2024 informed its formal documentation in the Edinburgh Journal of Botany on 27 October 2026. It belongs to the genus Begonia, family Begoniaceae and section Platycentrum. Its distinguishing features include pale pink flowers, dark green leaves with corrugated undersides, drooping female flowers and nearly equal-sized ovary wings. It is currently known from one Upper Siang location and has been provisionally classified as Data Deficient by the International Union for Conservation of Nature; further surveys have been called for.

Important Facts for Exams

• Flower arrangement: Begonia plants are monoecious: separate male and female flowers occur on the same plant, and female flowers have an inferior ovary.
• Fruit and seeds: Most Begonia species produce winged capsules containing numerous minute seeds, though berry-like fruits are also known.
• Growth form: Wild Begonias are terrestrial herbs or undershrubs, sometimes epiphytic, and occur in subtropical and tropical moist climates.