''Quercus serrata'', the jolcham oak, (, ) is an East Asian species of tree in the beech family. It is native to China, Taiwan, Japan, and Korea.

Description

''Quercus serrata'' is a

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, a ...

oak

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

reaching a height of occupying elevations from . The bark is gray or reddish-brown with longitudinal furrows. The leaves are up to long by wide, leathery, elliptical in shape, with serrated margins; they are densely covered with

trichome Trichomes (); ) are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a pl ...

s when young, becoming

glabrous Glabrousness (from the Latin '' glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part o ...

with age. The petioles are short (3 cm). The flowers are pistillate

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed ...

s from long, occurring in March to April. The seeds are oval-shaped

acorn The acorn, or oaknut, is the nut of the oaks and their close relatives (genera '' Quercus'' and ''Lithocarpus'', in the family Fagaceae). It usually contains one seed (occasionally two seeds), enclosed in a tough, leathery shell, and bo ...

s long and take one year to mature. A cup with trichomes and triangular shaped scales covers to of the acorn. The plant frequently attracts

stinkbugs Pentatomidae is a family of insects belonging to the order Hemiptera, generally called shield bugs or stink bugs. Pentatomidae is the largest family in the superfamily Pentatomoidea, and contains around 900 genera and over 4700 species.Robert G ...

which lay their eggs inside them.

References

External links

line drawing, Flora of China Illustrations vol. 4, fig. 364, 1-11
{{Taxonbar, from=Q847209 serrata Plants described in 1784 Flora of Eastern Asia Trees of China Trees of Korea