1、 Blade

The winter resistant leaves are leathery, alternate, oval or oval, then obovate, 4-10 cm long, the apex is acuminate or acute, the base is wedge-shaped and then nearly semicircular, the edge is serrated, the front color is dark green, the back color is light, glabrous, the petiole is thick and short, pilose or glabrous

2、 Flower

Winter resistant flowers are solitary or have 2 to 3 flowers, which are born in leaf axils or at the top of branches. There are 5-7 petals, the color is pink or bright red, the apex is notched or concave, and the base is tubular. Stamens are relatively developed, with more than 100 stamens, white filaments and golden anthers

3、 Seed

Winter resistant is that the capsule is round and the shell is woody. After maturity, the capsule can naturally crack and scatter seeds. The seeds are dark brown or light brown, nearly spherical or extruded into polygons, and the cutin is hard