Frozen green thorn

Frozen green thorn

(Hunan medical records)

[synonym] yashishu, Melia azedarach, dongpi tree, smelly plum, laoheyan.

[source] the stem, leaf and root bark of Rhamnus rotundifolia.

[plant morphology] Rhamnus rotundifolia

Deciduous shrub, up to 2 m high. The branches are grayish brown, with many branches. The branchlets are slender, with white pubescence and sharp spines at the ends. Leaves alternate or nearly opposite, papery, obovate or suborbicular, 2-4 cm long and 1-2.5 cm wide, apex acute to acuminate, base broadly cuneate, margin obtuse serrate, green above and light green below, with short Tricholoma on both sides, 3-5 pairs of main veins and lateral veins protruding below, with dense Tricholoma on veins; petiole 0.3-1 cm long, with dense Tricholoma and shallow furrow. Florets in leaf axils, cymes; petals and stamens in the edge of disk; ovary superior, style 2-lobed. The fruit is nearly spherical. Seeds oblate, black: glossy, with yellowish brown oblique groove at the base. The flowering period is spring and summer.

Wild in the hillside jungle. It is distributed in Northeast China and the lower reaches of the Yangtze River.

[collection] harvest in summer and autumn. Dry in the sun.

[flavor] bitter, slightly cold, non-toxic.

Functions and indications: kill insects, lower Qi, expel phlegm and eliminate food.

[formula selection] 1. To cure cunbaichong: four coins on the stem and leaf of Acanthopanax viridis, three coins on the root of persimmon, one coin on lime, and take it in water.

② Treatment of asthma: eight liang of frozen green thorn root skin, two liang of turtle dove stone, two liang of Sea Sands. Nine eggs, cooked, three days in the morning after eating, each medication juice a small cup.

③ Treatment of scrofula: freeze one or two stems and branches of Nitraria viridis, decoct in water.