What kind of poplar belongs to Populus simonii?

Populus simonii is also known as white, wax gourd poplar, poplar, paulownia, poplar and Nanjing poplar. Character: Character identification shows that the bark is tubular, with a thickness of1-3mm ... The tender bark is gray-green, with round lenticels and longitudinal stripes on the surface, and occasionally branch marks; Old leather has a dark color, rough surface and thick wrinkles. The inner surface is yellow and white with longitudinal fine lines. Hard and not easy to break, the section is fibrous. Slight breath and bitter taste. Microscopic identification of Populus simonii, cross section of bark: cork layer is 10 multi-row cork cells. There are scattered stone cell groups in the cortex, with thick stone cell walls and inconspicuous pits. The phloem fiber bundles are alternately discharged into discontinuous rings with sieve tubes and phloem parenchyma cells; The cells around the fiber bundle contain calcium oxalate square crystals, forming long sheath fibers, with a small number of stone cells, which are square, triangular, round and long, with a diameter of 29-59μm, and some are as long as 176μm, with thin walls and obvious striations and grooves.