Poplars usually bloom in April and May, and some of them bloom at the end of March.The climate environment of different area is different, temperature of some places rises quickly, if the temperature is on the high side, blossom time slants early, the blossom time of some areas can be a few later, blossom time gets the effect of local climate environment, can appear sometimes the phenomenon that autumn winter season blossoms.Poplar flowers belong to catkin, dioecious, no petals, male inflorescence length of about 10-14 cm, bracts on about 10 sharp, anther color is red, female inflorescence length of about 4-7 cm, bracts sharp crack, long hair on the edge, poplar flowers mature will crack, jump out of seeds, that is, our common poplar catkins, will float around by the wind.
1. Family and genus: Poplar is a deciduous tree of Salicaceae and Populus. It is a common street tree and grows very fast.It is distributed in Europe, Asia, North America and other regions, and is widely distributed in China.
2. Morphological characteristics: The height of poplar can reach about 30 meters, the color of bark is gray-green or gray-white, the shape of long branches and leaves is broad oval or triangular oval, and the short leaves are usually small, showing oval or triangular oval.
3. Propagation method: Poplar generally adopts the propagation method of cuttage seedling.
4. Variety classification: Populus varieties are divided into five schools, namely, Aigeiros, Populus euphratica, Populus, Tacamahaca, Albus.