Begonia samhaensis is a species in the family Begoniaceae. Similar to Begonia socotrana but separated by the asymmetrically ovate leaves and the unequal tepals in the male flowers; outer tepals broadly orbicular, 1.5–2.2 × 1.7–2.5 cm; inner obovate elliptic, 1.4–2.0 × 0.8 × 1.4 cm.