Osmunda japonica

Osmunda japonica

RhizomaOsmundae

Japanese flowering fern rhizome

[alias] daguancong, weiguanzhong, Daye Langyi.

[source] the rhizome and petiole base of Osmunda japonica Thunb.

[plant morphology] perennial herb, 50-100cm high. The rhizome is short and massive. The vegetative leaves are triangular broad ovate, 30-50cm long and 25-40cm wide, with two pinnae below the top. The pinnules are lanceolate, the apex is slightly obtuse, the base is round cuneate, the edge is serrate, and the veins are forked. The pinnules of the sporophyll are very narrow, curled into a linear shape, and the sporangia grow densely along both sides of the main vein, and wither after maturity, sometimes on the same leaf There are vegetative and spore feathers.

Born in the hillside forest, stream side, the foot of the road. It occurs in warm temperate zone and subtropical zone south of Qinling Mountains.

[harvesting] harvest all year round, cut off the aboveground parts and dry them in the sun.

[character] the product is slightly cylindrical, slightly curved, 10-17cm in length and 3-6cm in diameter. The rhizome has no scales, with dense petiole residues on the upper side and many brown black curved fine roots on the lower side. Petiole base is oblate cylindrical, curved. It is 4-6cm long, 3-5mm in diameter, with stipular wings, but most of them have fallen off; its surface is brown or brown black, its cross section is crescent or oblate, its vascular bundle is U-shaped, and it is often separated from the outer layer. The taste is slightly astringent.

[chemical constituents] it contains ponasterone a, custecdy sone and ecdysone.

Cold in nature and bitter in taste.

[indications] clearing away heat and toxin, hemostasis. It is used to prevent cold, epistaxis, dizziness, dysentery, metrorrhagia.