Paulownia
Keys in Flora of China are as below: 4 (1) Capsule oblong to oblong-ellipsoid, 6-10 cm; pericarp woody, 3-6 mm; inflorescences subcylindric; corolla ventral plaits inconspicuous; calyx 2-2.5 cm 4 Paulownia fortunei + Capsule ovoid, ovoid-ellipsoid, or ellipsoid, 3-5.5 cm; pericarp not woody, to 3 mm; inflorescences pyramidal or…