service tree
noun
1- a Eurasian tree of the rose family, closely related to the rowan花楸。
1.1
- Genus Sorbus, family Rosaceae: the southern European true service tree (S. domestica), with compound leaves and green-brown fruits that are edible when overripe, and the wild service tree (S. torminalis), with lobed leaves and brown berries.花楸属, 蔷薇科：包括花楸（拉丁名S. domestica）和治疝花楸（拉丁名S. torminalis）。
词源
mid 16th cent.: service from an alteration of the plural of obsolete serve, from Old English syrfe, based on Latin sorbus.