Erianthus hostii is a grass in the Poaceae family native to Southeast Asia. It belongs to the genus Erianthus and is of interest where gardeners and collections include less common ornamental grasses. Plants should be treated as a clump-forming grass when planning a site. Observe specimens in a planted setting to understand their seasonality and scale before permanent placement.

Erianthus hostii is a grass from Southeast Asia and is suited to trial plantings and specialist grass collections.

Erianthus hostii

Erianthus ravennae is an ornamental grass grown for use in screens and borders. It prefers full sun and full exposure and suits loamy or sandy, moist yet well-drained soils. In the UK it is classed H5, meaning it is hardy in most parts of the country.

Ravennagrass (Erianthus ravennae) prefers full sun and moist, well-drained loamy or sandy soil and is hardy (H5) in the UK.

https://en.wikipedia.org/wiki/Tripidium_ravennae

Tripidium is a genus of flowering plant in the Poaceae family of plants. The genus is native to southern Europe, North Africa, and parts of Asia with the native distribution of genus extending from the western parts of Mediterranean and Western Sahara, to the Korean peninsula and the island of New Guinea at the eastern-most extent of its distribution.