Stipa is a clump-forming perennial grass in the Poaceae with linear leaves forming neat clumps. It favours full sun on neutral loam that is well drained and suits a south-facing, sheltered site. Flowering occurs from June to September. Commonly called feather grass (also corkscrew, needle and spear grass), it is used for texture in borders and prairie-style plantings.

Feather Grass (Stipa) prefers full sun on neutral, well-drained loam and flowers from June to September.

Stipa is a genus of about 140 species of large perennial hermaphroditic grasses collectively known as feather grass, needle grass, and spear grass. They are placed in the subfamily Pooideae and the tribe Stipeae, which also contains many species formerly assigned to Stipa, which have since been reclassified into new genera.

Stipa

Feather grass | Stipa

Stipa arundinacea is a perennial grass grown for its arching green leaves that often take on orange, copper and gold tones in drier soils. It typically forms foliage to about 0.9 m in favorable conditions and is widely cultivated as an ornamental. In milder winters it remains evergreen to semi-evergreen, but it is marginal and will go dormant and become deciduous after hard frosts. It flowers from June to September.

Pheasant's Tail Grass Stipa arundinacea has arching, bronze-tinted foliage and flowers from June to September.

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

Anemanthele is a genus of plants in the grass family native to New Zealand.

Stipa arundinacea

Pheasant's Tail Grass | Stipa arundinacea

Stipa capillata is a perennial bunching grass valued for its very slender, feather-like flowering stems. It is native to Europe and Asia and suits exposed, sunny sites. Plant in free-draining, sandy or rocky soils and allow a dry to medium soil moisture regime. Flowering runs from June to September, when the narrow inflorescences give a light, airy texture to the planting.

Very Slender Feather Grass (Stipa capillata) is a perennial ornamental grass that flowers June to September and suits dry, sunny, well-drained sites.

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

Stipa capillata

Very slender feather grass | Stipa capillata

Stipa pulcherimma is a grass in the family Poaceae and a member of the genus Stipa. It produces flowers from June to September. Identification should rely on the botanical name to avoid confusion with other Stipa species. Check supplier information for specific habit and size before planting.

Stipa pulcherimma is a grass in the genus Stipa that flowers from June to September.