Utricularia microcalyx
A small annual terrestrial bladderwort from wet, seepy grassland on the plateaus of Zambia, western Tanzania and neighbouring countries. It lives only as long as its seepage stays wet, roughly February to July, flowering in that time before it dies and survives as seed. Peter Taylor first described it as a variety of U. welwitschii and later raised it to a species.
Where it grows wild
Specimen labels describe large seepage areas in Loudetia grassland on sandy-peaty soil over rock, wet grassland with small pools and rocky outcrops, waterfall spray zones, and the rocky banks of small streams. Wikipedia describes damp sandy or peaty soils in grassland.
Wikipedia gives 1,200-1,650 m. Labelled specimens run from 1,100 m (Ugalla River road, Tanzania) to 1,675 m (Uzondo Plateau).
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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. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.