椴树属（学名：Tilia）植物统称椴树，属于锦葵目 (Malvales)锦葵科 (Malvaceae)，或者与另外几属分出另作椴树科 (Tiliaceae)，又或称作田麻科。

椴树是落叶乔木，高可达30米，直径可达1米；单叶互生，常有星状毛或单毛，有锯齿或缺齿，通常基部斜歪；两性花，复聚伞花序；明显的特征是在总柄之基部与膜质、舌状的苞片合生；坚果或浆果。

Tilia is a genus of about 30 species of trees native throughout most of the temperate Northern Hemisphere. Commonly called lime trees in the British Isles, they are not closely related to the lime fruit. Other names include basswood and linden. The genus occurs in Europe and eastern North America, but the greatest species diversity is found in Asia. Under the Cronquist classification system, this genus was placed in the family Tiliaceae, but genetic research summarised by the Angiosperm Phylogeny Group has resulted in the incorporation of this genus, and of most of the previous family, into the Malvaceae.