Definition of wig tree in English:

wig tree

noun

  • The smoke tree.

    • ‘The plant's nickname ‘wig tree’ is derived from the silky skin of the leaves.’
    • ‘Forest steppe is situated either on the hills summits where they are represented by oak grooves with wig trees, or in the valleys where they are represented by oak and maple forests.’

Origin

Mid 19th century: so named because of its hair-like arrangement of flowers.