Herbs annual or biennial, glabrous or glandular, with a height of12-18cm. The stems are erect, branched at the base and clustered. The leaves are opposite, oblanceolate, 1.5-2 cm long and 2-4 mm wide. The lower leaf stems are short, and the upper leaves are sessile, entire or serrated. Flowers solitary in bud axils; Bracts linear oblanceolate; Calyx 4-parted and lobes narrowly lanceolate; Corolla white, slightly purplish red; Pedicel is short, about 65438±0mm long. Capsule oblate, glabrous, or sometimes sparsely short glandular hairs along the ridge, concave at the top, wider than long, short persistent flower branches, oblong, and flat and glabrous seeds. The ovary of this species is often swollen and peach-shaped due to insect parasitism. The flowering period is April-May. (I'm not sure if there are any graphs to compare)