Green dunce cap (Orostachys malacophylla)

Dmitry Poltavsky - Orostachys malacophylla

Orostachys malacophylla is a small succulent plant with rosettes up to 15 cm (6 inches) across at maturity. It is native to Siberia, Mongolia, China, Korea, Japan. The leaves are green, oblong to elliptic, entire, without apical spine. In summer, the rosettes rise like an erupting volcano as they burst into flower.