Sources

GBIF - Lychnis chalcedonica family classification — Plant family
NC State Extension Plant Toolbox - Silene chalcedonica — Plant family, Lifespan, Water needs, Sun needs, Soil notes, Height (cm), Spacing cm, Harvest start month, Harvest end month, Min. hardiness temp (°C), Insect types, Needs pollination
PFAF (Plants for a Future) — Plant family
PFAF (Plants For A Future) — Lifespan
PFAF (Plants for a Future) - Lychnis chalcedonica — Edible
Wikipedia - Silene chalcedonica — Plant family, Lifespan, Water needs, Sun needs, Soil notes, Height (cm)

Maltese cross

flower

Lychnis chalcedonica

Lychnis chalcedonica, commonly known as Maltese cross, is a perennial flowering plant in the Caryophyllaceae family, native to Russia and southeastern Europe. It is distinguished by its bright scarlet-red flowers arranged in dense, flat-topped clusters that resemble the Maltese cross symbol, blooming from June to August.