Definition of tulip trees:
(n) :
(botany) A North American tree, Liriodendron tulipifera, that has squarish leaves, cone-shaped fruit and an aromatic odor, of the family Magnoliaceae.
(n) :
(botany) Indian tulip tree, a tropical tree (Thespesia populnea, family Malvaceae).
(n) :
(botany) African tulip tree (Spathodea campanulata, of family Bignoniaceae).
(n) :
(botany) Nile tulip tree (Markhamia lutea, family Bignoniaceae).