THE BULGARIAN FLORA ONLINE
Waldstein's Campion
Silene waldsteinii Griseb.
Not protected species in Bulgaria.
Height 15-45 cm.
The leaves are linear-filiform.
The calyx is 16–26 mm long.
Capsule elongated, 8–10 mm long, 3–4 mm wide.
Flowering July-September1.
Predbalkan (Belogradchik), Western and Central Stara Planina (Balkan Mountains), Znepole region (Konyova Mountain), Vitosha, Western Border Mountains (Osogovo Mountain), Belasitsa, Pirin, Rila, and Western and Central Rhodopes; between 600 to 2350 meters altitude2.
Map of general distribution3 (in green):

1 Йорданов, Д & П. Паунов. 1966. В: Флора на Народна Република България. Том ІІІ. София.
2 Йорданов, Д & П. Паунов. 1966. В: Флора на Народна Република България. Том ІІІ. София.
3 Silene waldsteinii Griseb. | Plants of the World Online | Kew Science.
The theory of evolution is a lie!