Morphological characteristics:
Deciduous tree, 10-12 meters high; bark gray-brown, longitudinally split.
Shaped or conical, brown pilose or glandular hairs. Branchlets are yellowish brown, rough, glabrous or sparsely pilose, bald immediately, with small lenticels and inconspicuous.
The pinnate compound leaf is 15-25 cm long; the petiole is 4-6 cm long, the base is not thickened; the leaf shaft is straight, the upper surface is shallow, and the first is sparsely pilose, and then bald; 5-7 small leaves, hard paper Quality, ovate, obovate oblong to lanceolate, 3-10 cm long, 2-4 cm wide, terminal lobules and lateral lobules approximately equal or slightly larger, apex acute to acuminate, base Obtuse or wedge-shaped, with neatly serrated leaf margins, glabrous on the top, glabrous on the bottom or sometimes white pilose along both sides of the midvein, the midvein is flat on the top, 8-10 pairs of lateral veins, convex underneath, and fine veins on both sides Convex, with obvious net knots; petiole 3-5 mm long.
Panicles terminal or axillary branch tips, 8-10 cm long; peduncle 2-4 cm long, glabrous or pilose, smooth, without lenticels; flowers are dioecious; male flowers are dense, calyx is small, campanulate , about 1 mm long, without a corolla, anthers and filaments nearly as long; female flowers sparse, large calyx, barrel-shaped, 2-3 mm long, 4-lobed, style slender, stigma 2-lobed.
Samaras are spoon-shaped, 3-4 cm long and 4-6 mm wide. The upper and middle part is the widest, the tip is sharp, often plow-shaped, the base is tapered, the wings are flat, extending down to the middle of the nut, the nut is cylindrical, about 1.5 cm; persistent calyx close to the base of the nut, often open on one side and deeply split.
Flowering period: April to May, fruiting period: July to September.
Ash trees are mostly cultivated, and China has a long history of cultivation and is widely distributed. It is also seen in the forest of mixed trees in the mountains at an altitude of 800-1600 meters. The plant has strong germination ability, straight material, rapid growth, soft and tough, for weaving various utensils; the bark is also used for medicinal purposes.
Growth environment:
Ash tree is a positive tree species. It is light-loving and has strong adaptability to soil. It can grow on acid soil, neutral soil and calcareous soil. It can tolerate mild saline and alkali, and it likes moist, fertile and sandy and sandy loam soils. . Born in the forest of mixed trees in the mountains at an altitude of 800-1600 meters.
