Chaenomeles (possibly japonica or speciosa)
The leaves are alternately arranged, simple, and have a serrated margin. The flowers are 3–4.5 cm diameter, with five petals, and are usually bright orange-red, but can be white or pink; flowering is in late winter or early spring. The fruits are suitable for making liqueurs, as well as marmalade and preserves.
Originary from Asia.
Is a cultivated bush that grows in our front door at my workplace. It flowers in the winter.