Silene chalcedonica, the Maltese-cross or scarlet lychnis, is a species of flowering plant in the family Caryophyllaceae, native to Eurasia. Other common names include flower of Bristol, Jerusalem cross and nonesuch.

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

Silene is a genus of flowering plants in the family Caryophyllaceae. Containing between 500 and 900 species, it is the largest genus in the family.

Lychnis chalcedonica

Lychnis coronaria 'Oculata' is a perennial suited to sunny, well-drained positions and neutral to alkaline soils. It tolerates a range of exposure from sheltered to exposed sites and performs on a south-facing aspect. The plant is classed as hardy (H5) and belongs to the Caryophyllaceae family, making it appropriate for borders, rock gardens and cottage schemes.

Rose Campion (Lychnis coronaria 'Oculata') is a perennial for full sun on well-drained, neutral to alkaline soils suited to south-facing borders and rock.

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

Lychnis coronaria 'Oculata'

Rose Campion (Lychnis coronaria 'Oculata') | Sun Perennial

Lychnis flos-jovis is a perennial in the Caryophyllaceae native to the central Alps, notable for its alpine provenance. It reaches about 0.2–0.6 metres in height and suits well-drained sites with moderate moisture. Plant where it receives full sun or partial shade. It is fully hardy in the UK (H7) and fits rock and alpine garden situations as well as borders.

Flower-of-Jove (Lychnis flos-jovis) is an alpine perennial for well-drained soil in full sun or partial shade and is fully hardy (H7) in the UK.

https://en.wikipedia.org/wiki/Silene_flos-jovis

Lychnis flos-jovis

Flower-of-Jove (Lychnis flos-jovis) | Alpine perennial

Silene flos-jovis, the flower-of-Jove, is a species of flowering plant in the family Caryophyllaceae, native to the central Alps and found at elevations of 1,000–2,400 m (3,281–7,874 ft). It is a mat-forming perennial growing to 20–60 cm (8–24 in) tall and 45 cm (18 in) wide, with hairy grey-green leaves and clusters of notched pink flowers throughout summer.

Lychnis flos-jovis 'Hort's Variety'

Lychnis × haageana is a member of the genus Lychnis in the family Caryophyllaceae. It carries the hybrid signifier in its botanical name and is recognised by that formal epithet. Gardeners and nurseries will list it under the botanical name to avoid confusion with related taxa. Confirm cultivar details with the supplier before planting.

Lychnis × haageana is a member of the Caryophyllaceae; check supplier notes for cultivar-specific light, soil and hardiness guidance.