Panicum miliaceum. The stems are erect, multi-branched, with opposite branches, nearly quadrangular, grooved and short hairs along the grooves. The leaves are ovate or ovate-lanceolate, the apex is long and tapering, the base is wedge-shaped or nearly round, the whole leaf is entire, and both sides are sparsely short hairs along the veins. A terminal branch of a raceme; Bract leaves have the same shape as leaves, and gradually decrease upward, with 1-2 sharp teeth on both sides of the base; Calyx bell-shaped, sparsely short-haired, calyx teeth 4, unequal; Corolla blue-purple to purple-red, crown brim 2, lip-shaped, upper lip helmet-shaped, with dense hair inside, lower lip tip 3-lobed; Stamens 4, 2 strong, anther base with 2 conical processes. Flowers bloom in July. ?