A cross made by Dr. August Kehr (USA in 1992), cultivated and selected by Philippe de Spoelberch at the Arboretum. This healthy floriferous tree, created from the cross 'Yellow Bird' x 'Sundance', is frost resistant. The yellow flowers stand upright on the end of its branches. When opening, the flower looks like a cup, hence the name 'Butterbowl'. The flowers appear before the leaves and spread a soft sweet smell somewhat reminiscent of papaya. On warm days, the flowers can open completely, reaching a diameter of 17 cm. The tree has no central leader and therefore has a nice perfectly round shape.