Kentucky Coffeetree - Gymnocladus dioicus | Wirebasket Deciduous Tree // ABTreesKnown for having the largest leaf of any native tree (can get up to 90 cm long), which is compound and consisting of many small leaflets In Ontario, this tree is threatened by a change in habitat and land being cleared for agriculture They are also poor seed producers, must have both male and female trees present It gets its name from early settlers who may have roasted seeds as a coffee substitute (although many parts can be toxic to humans)