Water hyacinth

Water hyacinth

(collection of herbs in Lingnan)

[synonym] shuiyonghua (Guangdong traditional Chinese Medicine) and dasheyao (Guangxi Medicinal Plant List).

[source] it is the flower bud of myrtle.

[plant morphology] shuiweng, also known as Shuirong.

Trees, up to 15 m high. Branchlets subcylindrite or quadrangular, glabrous. Leaves opposite, broad ovate, oblong or elliptic, 8-20 cm long, apex acuminate, base obtuse into gradually narrow, nearly leathery, bald, often with black spots below when dry, 8-12 pairs of lateral veins; petiole 1-1.5 cm long. Flowers small, greenish white, subsessile, widely divergent cymes; calyx campanulate, ca. 3 mm long, subamputated, calyx limb extended into a cap; petals 5, connate into a cap, apex, glandular punctate; stamens numerous, free; ovary 2-locular, style linear. Drupe like berry, globose, ca. 7 mm wide, purple black when ripe. It blooms in summer.

They like to grow near water and often grow near villages. Distributed in Guangdong, Guangxi and other places.

The bark (bark) and leaf (leaf) of this plant are also used for medicine. Please refer to the special section for details.

[collection] before and after the Dragon Boat Festival of the lunar calendar, the flower branches with flower buds were picked, soaked with water, stacked for 3-5 days to make the flower buds fall off naturally, and then dried up to 30% in the sun. After 1-2 days, they were dried up for one day, and then dried up for one day. After enough drying, the remaining branches were screened out.

[herbal medicine] the dried flower buds are oval or spherical with sharp ends, about 4-6 mm in length and 2-3 mm in diameter. The lower part is a brown black inverted bell shaped or cup-shaped calyx, and the upper part is cap shaped, with 5 connate petals, light brown yellow. Except the cap body, there are overlapping stamens, the filaments are brownish black, and there is a conical style in the center. The quality is dry and hard. It is slightly fragrant and bitter. It is better to be yellow, black and without branches.

It is produced in Guangdong, Guangxi and other places,

[chemical constituents] the flower contains flavonoid glycosides, phenols and amino acids.

[nature and taste] "Lingnan medicine collection record:" bitter in taste, cold in nature. "

[function indications] it is used to treat exogenous aversion to cold, fever, headache and food stagnation.

① Lingnan medicine collection records: "clearing away heat, dispersing poison, eliminating food and resolving stagnation. "

② "Guangdong traditional Chinese medicine": "treatment of exogenous fever, headache, cold and fever. "

③ "Guangxi medicine plant directory": "treat headache, contusion, snake injury. "

[usage and dosage] oral administration: decoction, 0.5-1 Liang.