Introduction to Ash Tree

Ash trees are deciduous trees, 10-12 meters high, gray-brown bark, longitudinally split. The buds are broadly ovoid or conical, with brown pilose or glandular hairs. Branchlets are yellowish brown, coarse, 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 it is initially sparsely pilose and immediately 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 the sides of the midrib, the midrib 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, 4-6 mm wide, the upper and middle part is 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, approximately long 1.5 cm; persistent calyx is close to the base of the nut, often open on one side deeply. Flowering period from April to May, fruit period from July to September.