櫸木屬落葉喬木，原產東亞溫帶至亞熱帶地區。樹型高壯，樹冠圓形開展，高度可達30m。樹皮灰白色或褐灰色，不規則的雲片形剝落。互生紙質葉，卵形、橢圓形或卵狀披針形，葉長3~10cm，葉寬1.5~5cm，幼葉疏生糙毛後脫落變平滑，葉緣有圓鋸齒。雌雄同株異花，花微小。核果淡綠色，歪斜的卵狀圓錐形。開花期春季，結果期秋季。

A deciduous tree in the genus Zelkova, native to temperate regions of East Asia and subtropical regions. Tree shape sturdy and tall, up to 30 m in height, with a round-topped head. Bark grayish white or brownish gray, with irregular flakes. Leaves alternate, papery shaped ovate, oval or ovate-lanceolate, 3-10 cm long and 1.5-5 cm wide; young leaves with sparse bristles and turning smooth with time, margin crenate. Monoecious, flowers tiny. Drupes pale green, obliquely ovate conical. Flowering in spring and fruiting in autumn.

適合全日照溫暖與冷涼環境，乾旱容易生長不良，在濕潤肥沃土壤生長勢良好。修剪以不良枝為主。繁殖使用播種、空中壓條與嫁接法。

It suitably grows in full-sun, warm and cold environments and thrives best in moist and fertile soils, but it grows poorly in drought conditions. Perform pruning mainly for the inferior branches. Propagated by seeds, air layering and grafting.

天然樹冠圓整，適合空間較寬敞的公園、校園等處種植，或列植為行道樹。木材堅實耐磨，刨光後富有光澤，如同塗雞油一樣，因此俗稱「雞油」，適合建材、裝潢使用。

With a round natural canopy, it’s suitable for planting in a spacious environment like parks and campus, or in rows as street trees. The wood is solid and resistant to abrasion; after planing, the surface becomes as smooth and shiny as chicken oil, so it’s commonly known as "chicken oil", suitable for the use as material of construction and interior decoration.