Pentaphragma horsfieldii is a species of flowering plant in the family Pentaphragmataceae. It is a perennial plant with white flowers, and is native to south-east Asia. The species was described in 1858.
Taxonomy The species was described by Friedrich Anton Wilhelm Miquel in 1858, and placed in the genus Cyrtandra. In 1953, Herbert Kenneth Airy Shaw moved it to the genus Pentaphragma.
Distribution Pentaphragma horsfieldii is native to the wet tropical biome of Peninsular Malaysia, Sarawak, Sumatra, and peninsular Thailand. The species grows in moist, shady areas in evergreen forests. It is found near streams, at elevations of up to .
Description Pentaphragma horsfieldii is a perennial. The stem is long. The leaves are ovate or elliptical, slightly asymmetrical, long, and wide. The edges are finely toothed or smooth, and often rolled downwards. The leaf stems are long.
The inflorescence is scorpioid, curved, hanging, and grows on a long stem. The inflorescence is long, and has six to forty florets. The calyx is a white tube measuring long, and wide. The calyx has lobes, which are long, and wide. The corolla is white or greenish white, spoon-shaped, long, and around wide. The plant flowers from April to December.
The fruits are obovoid, around long, and around wide. The plant fruits from April to December.
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