Yang Xu's poems are as follows:
1. The heartbroken spring river is coming to an end, and the vine is standing in Fangzhou. Walking on crutches with a walking stick, standing on the fangzhou, only see Catkin like crazy, wanton flying in the wind, light and light of the peach chase running water. -Du Fu's "Nine Poems Manxing"
2. In the suburbs, the west is full of ice and snow, and the donkey's back is endless. Search for the bright moon and pear flowers, and enjoy the spring breeze catkins. -Tang Yanqian's "Remembering Meng Haoran"
3. Being a member of the Chinese army has little to return to, and magnolia has lost its spring. Steal with catkins outside the city, cross the water and smell the rules. -Li shangyin's
The Flowing Cup Pavilion on March 1th. 4. The wild fox springs fly with willows, but they will never return after being chased by water to the east. Flowers and water are long and unintentional, because the wind blows down and I am dependent. -Bai Juyi's
Information expansion:
Catkin, that is, the seeds of willow, with white fluff on it, is called catkin. Willow: a tree, up to 18m high, with a canopy for evacuation. Bark is grayish black and irregularly cracked; The branches are thin, drooping and hairless.
the buds are linear and the apex is acute. Leaves narrowly lanceolate, 9-16cm long, .5-1.5cm wide, long tapering at the apex, wedge-shaped at the base and serrated at the edge; Petiole 5-1mm long, pubescent; Stipules are only born on budding branches.
Meteorologists say that the weather with dry, high temperature, sufficient sunlight, low humidity and certain wind speed is easy to cause catkins to drift. In sunny weather, it is generally the high incidence period of catkins flying from 1 am to 16 pm. In the morning and evening, with the decrease of temperature and wind, the catkin flying is reduced. Catkin flying all over the sky is a season of high incidence of various allergic symptoms.