Molinia altissima is a species of grass in the genus Molinia, one of the moor grasses. As a member of that genus it shares a heritage with grasses from damp moorland in Eurasia and northern Africa. It is an herbaceous perennial and flowers from July to September. Its season of blooms provides mid- to late-summer vertical emphasis in planting schemes.

Moor Grass (Molinia altissima) is a perennial grass in the genus Molinia, flowering in the UK from July to September.

Molinia, or moor grass, is a genus of two species of flowering plants in the grass family, native to damp moorland in Eurasia and northern Africa. They are both herbaceous perennial grasses.

Molinia altissima

Moor Grass | Molinia altissima

Molinia caerulea is a perennial grass native to Europe and Asia that tolerates moist, acidic ground. It prefers full sun or partial shade and will grow in sandy, loamy or peaty soils that remain moist or wet. Rated H7 (fully hardy) for the UK, it flowers from July to September. Suitable uses include borders, naturalistic plantings and wet meadows.

Purple moor-grass (Molinia caerulea) prefers moist, acidic to neutral soils in full sun or partial shade and flowers July to September.

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

Molinia caerulea

Purple moor-grass | Molinia caerulea

Molinia caerulea 'Black Arrows' is a cultivar of Molinia in the grass family Poaceae, forming upright tussocks of closely packed stems. It produces narrow purple flower spikelets on panicles and typically flowers from July to September. Plants can reach around 1.2 m where sheltered by neighbouring heathers or gorse. The dense tussock habit gives the plant resistance to surface fires.

Purple Moor-grass Molinia caerulea 'Black Arrows' is a tussock-forming grass with narrow purple spikelets that flower July to September.

Molinia caerulea 'Black Arrows'

Purple Moor-grass | Molinia caerulea 'Black Arrows'

Molinia caerulea 'Heidebraut' is a tussock-forming grass in the Poaceae notable for its upright panicles of purple spikelets. Flowering runs July to September, when narrow purple seedheads rise above the foliage. It favours moist, acidic ground and is commonly found on heath and moor in Britain and Ireland. The clumps retain their seedheads into autumn, offering structure and movement as foliage dies back.

Molinia caerulea 'Heidebraut' is a tussock-forming grass with purple spikelets that flower July to September and suits moist, acidic ground.

Molinia caerulea 'Heidebraut'

Purple Moor-grass | Molinia caerulea 'Heidebraut'

Molinia caerulea 'Karl Foerster' is a perennial, tussock-forming grass valued for its upright habit and narrow, purple flowering panicles. The blooms appear in the UK between July and September. It originates from the Molinia genus within the grass family Poaceae and suits moist, acidic ground. Plants form neat clumps that give vertical structure through summer and into autumn.

Molinia caerulea 'Karl Foerster' (Purple Moor-grass) produces narrow purple panicles July to September and forms upright tussocks for moist, acidic soils.

Molinia caerulea 'Karl Foerster'

Purple Moor-grass | Molinia caerulea 'Karl Foerster'

Molinia caerulea 'Moorhexe' is a perennial, tussock-forming grass in the Poaceae valued for its narrow, purple flower spikelets. It produces upright clumps that set blooms from July to September. Leaves are narrow and form the tussock from which the flower stems rise. The purple panicles are the main seasonally visible feature.

Molinia caerulea 'Moorhexe' is a tussock-forming grass with purple flower spikes that bloom July to September in moist, acidic sites.

Molinia caerulea 'Moorhexe'

Purple Moor-Grass | Molinia caerulea 'Moorhexe'

Molinia caerulea 'Poul Petersen' is a tussock-forming perennial grass in the Poaceae noted for its long, narrow purple spikelets. It flowers from July to September, producing open panicles. Dense tussocks give the plant structural presence and make it resistant to heath fires. The cultivar is associated with moist, acidic sites in its native range.

Purple Moor-grass Molinia caerulea 'Poul Petersen' produces purple panicles from July to September and favours moist, acidic sites.

Molinia caerulea 'Poul Petersen'

Purple Moor-grass | Molinia caerulea 'Poul Petersen'

Molinia caerulea 'Transparent' is a cultivated selection of the genus Molinia in the grass family Poaceae. It produces a defined flowering display in the UK between July and September. The cultivar name identifies this particular selection within Molinia. Use it where a clear mid-summer to early-autumn grass flowering period is required in planting plans.

Molinia caerulea 'Transparent' is a Molinia cultivar that flowers in the UK from July to September.

Molinia caerulea 'Transparent'

Molinia caerulea 'Variegata' is a grass notable for its variegated leaves and purple summer flowers. It produces purple blooms from July to September. The cultivar tolerates exposed and sheltered sites and prefers moist, acidic to neutral soil. Plant it where moist, well-drained conditions can be maintained.

Variegated Purple Moor Grass (Molinia caerulea 'Variegata') has variegated leaves and purple flowers July to September, suited to moist, acidic soils.