Any of various deciduous shade trees of the genus tilia having heart-shaped leaves , drooping cymose clusters of yellowish , often fragrant flowers , and peduncles united into a large lingulate bract .

椴树一种落叶遮荫树木椴树属，长有心形叶，浅黄色聚伞状下垂花序，通常花朵芳香，花梗下端有巨大舌状苞片。