The pinyin of Huang Huan is: huáng lú.

Cotinus coggygria? Scop. is a deciduous small tree or shrub of the Cotinus genus in the Anacardiaceae family. The crown is round, the xylem is yellow, and the sap has a peculiar smell; the petioles are thin, there are no stipules, and the leaves are Obovate or oval.

The anthers are oval and purple-brown; the drupe is small and dry, kidney-shaped, flat and green; the flowering period is from May to June, and the fruiting period is from July to August. The cotinus gets its name from the bright yellow color of its wood.

Cognat is native to China, western Asia and southern Europe, and is distributed in North China, Central China and Southwest China; it is also distributed in Southern Europe. Cotinus prefers light, but is also tolerant of semi-shade, cold-tolerant, drought-resistant, infertile and alkaline soil, and intolerant of water and moisture. It should be planted in sandy loam with deep, fertile and well-drained soil. The propagation methods of cotinus are sowing, root cutting and division.

According to "Guizhou Herbal Medicine", the roots, stems and leaves of Cotinus cotinus can be used as medicine; they are cool in nature and pungent in taste; they are effective in dispersing blood stasis and relieving pain, clearing away heat and detoxifying; they are mainly used to treat falls, measles, and erysipelas pain. Cotinus cogitata is an important ornamental red-leafed tree species. Its leaves turn red in autumn and are bright and eye-catching. After blooming in early summer, there are lavender feathery pedicels that persist for a long time. They are suitable for cluster planting on lawns, mounds or hillsides in gardens.

Morphological characteristics:

Deciduous small trees or shrubs with round crowns, up to 3-8 meters high and 2.5-6 meters wide, with yellow xylem and odorous sap; single The leaves are alternate, the leaves are entire or toothed, the petioles are thin, there are no stipules, and the leaves are obovate or oval.

The panicles are loose and terminal, and the flowers are small and mixed, with only a few developing; the pedicels of sterile flowers are elongated after the flowering, and are pinnately villous and persistent; the bracts are lanceolate, Fall early; the calyx has 5 lobes, persists, and the lobes are lanceolate: the petals are 5, long oval or ovate-lanceolate, and the length is twice the size of the calyx.

There are 5 stamens, inserted in the lower part of the annular flower disc, the anthers are oval, as long as the filaments, the flower disc is 5-lobed, purple-brown; the ovary is nearly spherical, deflected, with 1 cell and 1 ovule; Styles 3, separated, lateral and short, stigma small and vestigial.

The drupe is small, dry, kidney-shaped, flat, green, with remaining styles in the middle of the sides; the exocarp is thin, veined, and indehiscent; the endocarp is horny; the seeds are kidney-shaped and have no endosperm. The flowering period is from May to June, and the fruiting period is from July to August.