the goldenrain tree

3-angled 4-6 6-8 august bark beautiful black blooming brown capsule conical cracks dark deciduous diameter flower flowering fruit fruiting goldenr goldenrain gradually gray grayish green june koelreuteria long longitudinal millimeters name network october old outside ovoid paniculata pattern period petals pointed pores rain scientific seeds september shiny shrub skin small smooth spherical surface thick tip tree yellow