Bracken

Bracken

(manual of plateau Chinese herbal medicine treatment)

[synonym] kejiahawu (Tibetan name).

[source] the whole plant of Dryopteris brownii.

[plant morphology] bracken, also known as Dryopteris brownii.

Perennial herbs, 40-60 cm high. Rhizome massive, recumbent. Petiole short, 6-8 cm long, furrowed, brownish brown, densely scaly with axis; scales light brown or even yellowish brown; leaves oblanceolate, 40-60 cm long, 10-15 cm wide, lower pinnae gradually shortened, twice pinnate; pinnae oblanceolate, 5-8 cm long, 2 cm wide; base widest; pinnules oblong ovate, slightly auricular, closely connected, margin sparsely spiny dentate, teeth soft The lower part of the leaf, its axis and middle rib are covered with scaly hairs; the lower part of the leaf is gray green. The sporangia are small, unconnected, located near the middle rib, with entire ascospore cap, glabrous.

It grows in the shady wetland and rock crevice under the alpine forest. Distributed in Shaanxi, Sichuan, Yunnan and other places.

[collection] from August to September, it was excavated, cut into sections and dried in the sun.

It is astringent and cold.

[meridian tropism] entering lung and spleen meridians.

[function indications] clearing away heat and toxin. Cure virus eruption.

[usage and dosage] oral: decoction, 3-5 yuan.

[selection] treatment of fever and toxin eruption: bracken with Cimicifuga, Schizonepeta tenuifolia, Saposhnikovia, decoction.