Begonia arunachalensis - Arunachal Begonia

Arunachal Begonia is a newly discovered (2021) Begonia, a monoecious, tuberous, perennial herb, 3-20 cm tall. Stem is 4-17 cm long, 2-5 mm thick. Leaf-stalks are whitish green, round, 0.5-10.5 cm long, 1-3 mm thick, velvet-hairy. Blade is green, broadly ovate to round, 4-11 x 3.5-10 cm, asymmetric, densely hairy on both surfaces; venation palmate, 7-9 veined; slightly heart-shaped at base, lobes not overlapping, margin irregularly toothed, tip tapering. Flowers are borne in leaf-axils, in 2.5-15 cm long, 1-3 branched clusters, carried on flower-cluster-stalks reddish green. Bracts are ovate, 1.8-2 x 0.8-1 mm. Flowers are 2-10 per cluster. Male flowers: flower-stalk light green to reddish green, velvet-hairy, flowers 1-3 cm in diameter; tepals 4; outer 2 larger, ovate, 8-11 mm long, whitish pink; inner 2 smaller, obovate, 4-7 mm long, white; stamens 25+, filaments 1-2 mm long. Female flowers: flower-stalk pink, 2-4.5 cm long; flowers 0.8-1 cm in diameter; tepals (3-)4, pinkish white, outer 2 broadly ovate to round, 4-6 mm long; inner tepals broadly obovate, 2.5-5 mm long; styles fused, 1-3 mm long; stigma 3-4, yellow; ovary 4-5 mm long, pinkish green, densely velvet-hairy, 2-5 winged. Capsule is 0.7-1.1 cm long, pendent, lateral wings up to 3 cm; locules 3-4. Arunachal Begonia is endemic to Arunachal Pradesh.