What leaves can we whistle with in spring?

The leaves we can whistle with in spring are willow leaves.

Willow leaves are weeping willow leaves, and weeping willow is also a symbol plant of spring.

Weeping willow (scientific name: willow? Babylonica? Tall deciduous trees are widely distributed and have strong vitality. Is one of the common tree species, weeping willow is also a common street tree in landscaping, with high ornamental value and low cost, which is deeply loved by greening everywhere.

Mainly distributed in Zhejiang, Hunan, Jiangsu and Anhui. Branchlets slender and pendulous, yellow-brown. Leaves alternate, lanceolate or strip-lanceolate, 8 ~ 16 cm long, tapering at the top, wedge-shaped at the base, young leaves hairless or slightly hairy, serrate, stipules lanceolate. Stamens 2, filaments separated, anthers yellow, glands 2. Female flower ovary sessile, gland 1. Flowering in March-April; The fruit ripens from April to June.

Growth habits of weeping willows:

I like sunshine, warm and humid climate and deep wet acid and neutral soil. Cold-resistant, especially resistant to water and humidity, but it can also be born in high drought areas with deep soil layers. The germination is vigorous, the root system is developed and the growth is rapid. The annual tree of 15 is as high as 13m and has a diameter of 24cm. But some pests are more serious, life span is shorter, and the trunk is easy to age. Gradually aging after 30 years. The root system is developed, which has certain resistance to toxic gases and can absorb sulfur dioxide.

Baidu encyclopedia-weeping willow