Thousand-head chrysanthemum planting base tells that Thousand-head chrysanthemum is a deciduous tree with a height of about 30 meters, with many branches, small angles, balanced growth, and thick branches arranged in clusters, without obvious main trunk. The crown is funnel-shaped, egg-shaped or nearly spherical. The leaves are odd-numbered pinnate compound leaves, alternate, and even-numbered pinnate compound leaves. Some odd-numbered leaves are very small and linear, and the young leaves are slightly smelly. There are 13-25 leaflets, ovate-lanceolate to elliptic-lanceolate. Entire, the flowers are pale yellow, unisexual, without pistils, and the panicles are terminal.
As the flowers fall off, the entire inflorescence gradually disappears. The general flowering period is about 20 days, and some are as long as more than a month, that is, from mid-May to early June, and the blooming period is mid-May. The samara is flat, brownish-yellow, slightly flushed before maturity, with no or few seeds.
The old bark of A. chinensis is grayish brown, shallow longitudinally split, the outer skin is 1-3 cm thick, and the texture is brittle. The inner bark is 5-7 cm, easy to twist into light yellow sand grain; the young bark is gray-white, the inner bark is green and smooth; the pith is large, Oval shape, with yellowish white and reddish sponges, ring-porous wood; the heart and sapwood are not very obvious, the sapwood is light yellow, easy to blue, the heartwood is light yellow brown; the annual rings are obvious, the width is not even, early The material tube has a large hole with a width of 1-4 cracks, containing orange-yellow gum. The late wood tube has a small hole, scattered or concentrated at the end of the annual ring, and is often connected with the parenchyma in a short string or oblique line, and the axial parenchyma Compensation tube, wood rays are obvious.