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

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.