Verbena has the functions of clearing away heat and toxic materials, promoting blood circulation, removing blood stasis, inducing diuresis and reducing swelling. Treat exogenous fever, damp-heat jaundice, edema, dysentery, malaria, diphtheria, laryngitis, gonorrhea, amenorrhea, abscess, carbuncle and toothache.

The powder of this product is green and brown. Stem epidermal cells are long polygons or rectangles with flat and porous longitudinal walls. The epidermis of the lower leaf has 3 ~ 5 accessory cells, the vertical wall is wavy and curved, and the stomata are infinite or unequal. There are 4 cells in the head of glandular scale, with a diameter of 23 ~ 58 microns; A single cell with a stalk. Non-glandular hairy single cell. Pollen grains are round or triangular, with a diameter of 24 ~ 35 microns, a smooth surface and three germination holes.

Extended data:

Morphological characteristics of verbena officinalis;

Perennial herbs. Height is 30~ 120 cm. The stem is square, and the nodes and edges are covered with bristles. Leaves opposite, subsessile, ovoid to obovate or oblong-lanceolate, basal leaves usually have coarse serrations and notches, most cauline leaves are 3-parted, lobes have inconspicuous coarse jagged edge, and both sides are covered with bristles, especially on the inferior veins.

Spikes are slender, terminal or axillary; There are l ovule-shaped subulate bracts under each flower; Calyx tubular, membranous, 5-toothed; Corolla tubular, lavender to blue, 5-lobed, nearly 2-lipped; There are four stamens.

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