1. Stems up to 200 cm, glabrous at base, bracts without membranous margin, stylopodium depressed; plant of salt marshes and salt steppes......................................................................................................................................................................... S. salsugineum
– Stems up to 150 cm, pubescent at base, bracts with membranous margin, stylopodium conical; plant of forests, alpine meadows, and rocky slopes.................................................................................................................................................................................2
2. Terminal leaf segments 15–26 mm long; umbels up to 14 cm in diameter; bracts 8–19 mm long................................... S. libanotis
– Terminal leaf segments 1–6 mm long; umbels at most 3–3.5 cm in diameter; bracts 4–7 mm long.................. S. transcaucasicum