The older the stem, the more fibrous roots it produces. The annual stem is a uniaxial extension of the old stem, rising or nearly erect, covered with grass, angular, with sometimes narrow wings and green edges.

Leaves alternate, usually 2 times larger than the lower part of stem tip1-. The leaves are oval to oval in width, 4- 1 1 cm in length and 2-6 cm in width. The tip is sharp or slightly blunt, the sharp angle is short, the base gradually narrows or becomes wide wedge-shaped, and the edge is slightly wrinkled, which is grasslike. When it is dry, there are extremely inconspicuous depressions on both sides. The petiole is 5- 12 mm long and the wings are narrow.

Flowers solitary axillary; Pedicel slender, 2.5-4 cm long; Calyx is 7- 12 mm long, deeply divided near the base, lobes ovate-lanceolate or lanceolate, 2.5-5 mm wide, apex acuminate, sometimes subulate, grasslike, with brown sessile glands on both sides; Corolla yellow, long12-17mm, cracked at the base, oblong lobes, 6-9mm wide and obtuse at the top; Filaments and corolla base are about 0.5 mm, and the separation part is very short; The anther is 4-5 mm long, the base is heart-shaped, the width is about 65438 0.75 mm, and the apical pore is dehiscent; Pollen grains are spherical (15-16×13-15 micron) with three holes and slightly wrinkled surface. Style 5-7 mm long.

Capsule subglobose, grayish white, 6-7 mm in diameter, indehiscent or with a shallow tip. Flowering in May; Result period: August-September.