Pentarhizidium orientale, the Oriental ostrich fern, is a fern native to China, Japan, and the Himalayas.

It grows to about 0.6 m (2 ft) in height by 0.6 m (2 ft) wide.

It was formerly included in the genus Matteuccia, but phylogenetic studies mandated that it and Pentarhizidium intermedium be moved to a new genus.

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