櫟屬落葉喬木，臺灣原生，中國大陸、日本及韓國亦有分佈。樹皮暗灰色，具深溝。單葉互生，常叢生枝條頂端，闊倒卵形，葉緣波狀鋸齒緣，嫩葉兩面密被軟毛或星狀毛。雌雄同株異花；雄花序多抽自新枝條的基部，為細長下垂之柔荑花序；雌花序短，多生長於枝條先端；花期2~3月。殼斗杯狀，紅褐色，向外反曲，包被堅果1/2以上；堅果卵形；果期9~10月。

A deciduous tree in the genus Quercus, native to Taiwan, and also found in China, Japan and South Korea. Bark dark gray with deep grooves. Simple leaves alternate, often tufted near the tip of branches, broad obovate, leaf margin wavy and serrated, leaflets packed with soft or stellate pilose on both sides of tender leaves. Dioecious flowers; slender and drooping male catkins drawn from the base of new branches; female flowers short and mostly axillary; flowering from February to March. The cupule cup-shaped, reddish-brown, recurved outward, and covering over a half of the nut. Acorn ovate and produced from September to October.

喜全日照溫暖乾燥的環境，對土壤要求不高，但以砂質壤土富含有機質為佳，排水需良好。種子或扦插繁殖。

The plant grows well in warm, dry and full sun environment. Less demanding on soils, but sandy loam with rich organic matter and good drainage is preferred. Seed or cutting propagation.

可作庭園景觀樹。槲樹葉可養柞蠶，自古以槲樹葉養蠶所生產的絲叫"柞蠶絲"，比一般的蠶絲色澤更光滑。木材堅硬，耐磨損，但易翹裂，可供坑木、地板等用材。樹皮、種子可入藥作收斂劑。種子富含澱粉與單寧，可釀酒或作飼料。

Suitable to be a garden landscape tree. The leaves were used in early times to rear tussah silkworms to produce tussah silk which is glossier in color than others. The hardwood is abrasion-resistant, but prone to warp, suitable to be used as pit wood and flooring. The bark and seeds are the ingredients of astringents. The seeds are rich in starch and tannins, they can be used for wine-brewing or as feed.