Begonia melanobullata
A limestone-karst begonia from Cao Bang Province in northern Vietnam, described in 2015 and named for the dark maroon, cone-shaped bumps topped with long hairs that cover its emerald leaves. It grows on semi-shaded wet cliffs and steep limestone slopes in evergreen forest at 300–400 m, where summers are hot and wet and winters are cool and dry. Grow it warm and humid in summer, a little cooler and drier in winter, in a free-draining mineral mix.
Where it grows wild
Lithophytic or rooted in pockets of soil on semi-shaded, wet limestone cliffs and steep limestone slopes in evergreen broad-leaved forest. It is a rhizomatous member of section Coelocentrum, the group of begonias that lives in the Sino-Vietnamese limestone karst.
Known from 300–400 m at the type locality in Thach An District. The single measured wild site sits in the same area, so the grid climate is a reasonable match for elevation.
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.