What is the word "Cao Tian"?

The day of the old grass is: rudder. Shh.

Yarrow is a perennial herb with angular stems, lanceolate leaves, deep plumage, white flowers and flat achenes. The whole plant is used as medicine, and the stems and leaves contain aromatic oil, which can be used as spices. In ancient China, its stem was used for divination.

Stem solitary, 35 ~ 50 cm high, white pilose. Rooting petiole is short, stem leaves sessile, alternate, oblong to oblong linear, up to 15 cm long and 3 cm wide, with 2-3 pinnate lobes, micro-lobes and sharp tips. The flower heads are arranged in an umbrella shape, and the involucre is obovate, 4 ~ 5 mm long and 3 ~ 4 mm wide; Involucral bracts oblong, scarious, in many rows.

There are 5 (even 4 or 6) marginal flowers around each flower, with a tongue-shaped corolla, corolla pieces pink or thin white, oval to oval, 3-lobed apex and about 3 mm in length and width; The capitate flower heart is tubular, bisexual, with 5-lobed apex, lower ovary and stipules in receptacle. Achenes are oblate with wings at the edges. The flowering period is from June to August.