The twig of Cinnamomum cassia Presl (Fam. Lauraceae).
Mainly in Chinese provinces such as Guangxi, Guangdong and Fujian; also in Yunnan province and Hong Kong.
Harvest & Processing
Clip off twigs two years after field planting; remove foliage; dry twigs under the sun. Alternatively, collect branches clipped off or coppice shoots hacked off during trimming; dry under the sun.
Long and cylindrical, ramose (with many branches); 30-70 cm long, 0.3-1 cm in diameter at the thick end. Outer surface brownish-red or reddish-brown, marked with fine wrinkles and small verruciform (wart-shaped) scars of leaves, branches and buds; lenticels punctiform (dot-like) or elliptical-punctiform. Hard and brittle, breaks easily. When broken, surface shows reddish-brown cortex; xylem yellowish-white to light yellowish-brown; pith somewhat quadrate (square-shaped). Odour: with a distinctive fragrance; taste: sweet and slightly acrid, cortex with a stronger taste.
1. Common cold, cough, dizziness
2. Palpitation, precordial pain
4. Amenorrrhoea, dysmenorrhoea
5. Dysuria, oedema
Mainly contains essential oils with cinnamaldehyde as the main component.