There is insufficient evidence to support the use of St. John's wort, valerian or passionflower. Skullcap and valerian are plants containing GABAergic substances . It contains many species, including the garden valerian, "Valeriana officinalis". Lush herbaceous meadows are typified by Sitka valerian and showy sedge. It has been proposed that it is the anticonvulsant agent in valerian. There is insufficient evidence for efficacy and safety of valerian for anxiety disorders. Valerenic acid is a sesquiterpenoid constituent of the essential oil of the Valerian plant. The inscription refers to the Dionysian Mysteries and also mentions Roman Emperors Valerian and Gallienus. Balista was the praetorian prefect under Valerian. During the reign of the Roman Emperor Valerian, Christian persecution was particularly severe. Gallus was killed by his own troops, who joined Aemilianus before Valerian arrived. When the circle dissolved, Dostoevsky befriended Apollon Maykov and his brother Valerian. Webb rechristened himself "Valerian", Gardiner "Scarlett" and Lidyard "Rael". In 1935, Samara was renamed Kuybyshev in honour of the Bolshevik leader Valerian Kuybyshev. It was recaptured by the Roman emperor Valerian the following year.