The root and rhizome of Peucedanum praeruptorum Dunn and P decursivum
Maxim., family Umbelliferae.
P. praeruptorum: Axial root thick and short terete or conical, with 1-2
roots; 6-9 cm long, 1-2 cm in diameter. Surface brown, rhizome with dense
annular nodes. Prepared by crosscutting; section yellowish white, scattered
oil spots visible; cortex thick and loose. P decurivum: Axial root longer,
annular nodes in the rhizome inconspicuous, with 2-3 spreading branches;
cross section showing a narrower cortex with oil spots, while the xylem
with few or no oil spots. Bitter and acrid in taste, slightly cold in
nature, and attributive to lung channel.
Open the inhibited lung-energy, eliminate phlegm, lower the adverse-rising
energy and relieve cough: For wind-heat syndrome manifested as cough with
thick sputum and chest upset; for undescending of lung-energy
with cough and dyspnea.
1. Oral use of its decoction can increase secretion of respiratory tract
significantly and promote expectoration.
2. Its active component nodakenetin possesses antibacterial and antimycotic