Habits of Populus davidiana

Populus davidiana likes light tree species, but it is resistant to water, humidity, cold and drought. The roots are deep, the main roots and lateral roots are developed, and the deep and fertile riverbed grows well on both sides. Fast growth, strong tillering ability and strong resistance to sulfur dioxide and chlorine. The leaves are poisonous and are not suitable for planting near fish ponds.

Poplar is a highly deciduous tree and an excellent garden plant with water resistance and cold resistance. Also known as "Fraxinus mandshurica", "Fraxinus mandshurica", "Fraxinus mandshurica" (Hubei) and "centipede willow" (Anhui), they belong to Pterocarya of Juglandaceae.

Big trees, up to 30 meters, DBH 1 meter; The bark of young trees is smooth and light gray, but it is deep longitudinally when it is old; Branchlets gray to dark brown, with gray-yellow lenticels; Buds stipitate, densely covered with rusty brown peltate glands. Most of the leaves are even or odd pinnate compound leaves, 8- 16 cm long (as thin as 25 cm), and the petiole is 2-5 cm long. Leaf rachis winged and undeveloped, covered with sparse or dense short hairs like petioles. Leaflets 10- 16 (sparse 6-25), petiole-free, opposite or sparsely subopposite, oblong to oblong-lanceolate, about 8-1 2cm long and 2-3cm wide, with the tip often blunt or sparse and sharp, the base askew, and the top/kloc-0. There are very short stellate hairs along the midvein and lateral veins, and there are scattered hairs below when they are young. After growing up, it falls off, leaving only very sparse glands and 1 cluster of stellate hairs in the axils of lateral veins. The male inflorescence is about 6- 10 cm long, which is born alone in the axils of leaf scars on the branches of last year, and the inflorescence axis often has sparse stellate hairs. Male flowers usually have 1 (sparse 2 or 3) developed perianth segments and 5- 12 stamens. The female inflorescence is terminal, about10-15cm long. Inflorescence rachis densely covered with stellate hairs and simple hairs, the lower part of which is 3 cm long and has two sterile bracts up to 5 mm long. Female flowers are almost sessile, and the bracts and bracteoles often have tiny stellate hairs at the base, which are densely covered with glands. Infructescence is 20-45 cm long, and the axis is often covered with persistent hairs. The fruit is oval, about 6-7 mm long, with persistent stellate hairs at the base; Fruit wings are narrow, strip-shaped or wide, long 12-20 mm, wide 3-6 mm, and veins are nearly parallel. The flowering period is April-May, and the fruit maturity is August-September.