Lychnis chalcedonica (Hessenhof Form) is a perennial herbaceous plant in the Caryophyllaceae, grown for its clustered bright red flowers. Stems are unbranched and typically 35–100 cm tall, bearing opposite, broadly lanceolate leaves. Flower clusters hold 10–50 individual blooms, each 1–3 cm across with a deeply five-lobed corolla. The fruit is a dry capsule that contains numerous seeds.

Maltese Cross (Lychnis chalcedonica (Hessenhof Form)) produces clusters of bright red flowers from June to September and holds the RHS Award of Garden.

Lychnis chalcedonica (Hessenhof Form)

Maltese Cross | Lychnis chalcedonica (Hessenhof Form)

Lychnis coronaria 'Alba' is the white-flowering form of rose campion, a perennial in the Caryophyllaceae. It produces single white flowers in succession and carries grey, felted leaves, growing to about 80 cm tall by 45 cm wide. In the UK it flowers from June to September. Plants are typically short-lived but readily self-seed and are sometimes grown as biennials.

Lychnis coronaria 'Alba' (rose campion) bears white, single flowers and grey felted leaves and flowers in the UK from June to September.

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 coronaria 'Alba'

Rose Campion | Lychnis coronaria 'Alba'

Silene aomorensis is a clump-forming herbaceous perennial in the Caryophyllaceae that carries its flowers through the summer months. It has deciduous foliage and suits south-facing, exposed positions in full sun. Plant it into a well-drained neutral loam to avoid waterlogging. Flowering runs from June to September, providing extended summer interest.

Silene aomorensis is a clump-forming herbaceous perennial flowering June to September, best in full sun on well-drained neutral loam in exposed.

Silene aomorensis

A herbaceous perennial bearing pink to red summer flowers, Melandrium rubrum (Red Campion) offers a summer display in partly shaded places. It is native to Europe and produces its blooms from June to August. The plant prefers moist soils of loam, sand or clay and tolerates neutral to slightly acidic conditions. Fully hardy in the UK (H7), it suits woodland margins and wildlife-friendly borders.

Red Campion (Melandrium rubrum) is a European herbaceous perennial that flowers from June to August and suits woodland and wildlife gardens.

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

Silene dioica

Red Campion | Melandrium rubrum

Silene dioica 'Flore Pleno' is a perennial in the Caryophyllaceae, selected as a double-flowered form of Red Campion. It typically reaches about 0.5 m and suits sheltered, wind-protected sites. In the UK it flowers from June to September.

Red Campion Double (Silene dioica 'Flore Pleno') is a perennial that flowers in the UK from June to September and suits sheltered border positions.

Silene dioica 'Flore Pleno'

Red Campion Double | Silene dioica 'Flore Pleno'

Silene dioica 'Richmond' is a herbaceous perennial in the Caryophyllaceae that produces dark pink to red flowers from June to September. It reaches about 0.5 m and suits positions in full sun or partial shade. The cultivar tolerates sandy, loamy and clay soils provided they remain moist but well-drained. Native to regions of Belgium, it is commonly used in borders, wildflower areas and for naturalising.

Red Campion (Silene dioica 'Richmond') bears pink-red flowers June to September and suits borders, wildflower and naturalising plantings.

Silene dioica 'Richmond'

Red Campion | Silene dioica 'Richmond'

Silene fimbriata is a perennial in the Caryophyllaceae, named for its fringed flowers. It originates from the Caucasus and flowers from June to September. It prefers full sun to partial shade and well-drained soil with a moderate moisture level. Use it in rock gardens or at the front of borders where drainage is good.

Fringed-flowered campion (Silene fimbriata) is a Caucasus perennial that flowers June to September and suits well-drained positions in sun or part shade.