Because of its similarity to the verdant russula, phalloid amanitis is responsible for 90% of severe poisoning cases. It is quite common and may be found in many types of woodlands. Its cap is yellowish green, slightly sticky, and covered with thin white lamellae (3 to 15 cm). The foot is whitish, with a ring at the top and a volva (= membrane that envelops the mushrooms when they are young). The spring amanita is similar to the phalloid, with the exception that its cap is white and smooth. The virose amanita has a longer foot and a less conical crown than the spring amanita (5 to 10 cm in diameter). Furthermore, its volva is thicker.