Fagus sylvatica include flower buds. The leaves of beech are often not abscissed in the autumn and instead remain on the tree until the spring. This process is called marcescence. This particularly occurs when trees are saplings or when plants are clipped as a hedge (making beech hedges attractive screens, even in winter), but it also often continues to occur on the lower branches when the tree is mature. Small quantities of seeds may be produced around 10 years of age, but not a heavy crop until the tree is at least 30 years old. "F. sylvatica" male flowers are borne in
Hylorina sylvatica Hylorina sylvatica Hylorina sylvatica (also known as the Emerald forest frog, or in Spanish, sapo arboreo) is a species of frog in the family Batrachylidae. It is monotypic within the genus Hylorina. It is found in Argentina and Chile. This species is endemic to the austral "Nothofagus" forests of Chile and Argentina with a narrow distribution along the eastern slopes of the Andes. Male "Hylorina sylvatica" grow to snout-vent length of and females to . They are emerald-green during the day while they turn dark green at night. Adults can be found in permanent and temporary pools, swamps, and marshes.