Cumin leaves or sukan (Plectranthus amboinicus) are herbs from the Lamiaceae family that are often used in herbal medicine. It also has other names such as acerang, acrang, ajiran, sukan, daun hati-hati, godong kucing, g.kambing, majha nereng, iwak, golong, and kunu etu. This herb is native to South and East Africa, originally distributed from KwaZulu-Natal and Swaziland to Angola, then to Mozambique, and northward to Kenya and Tanzania. It is widely cultivated and has also naturalized.

Cumin leaves are thought to have originated in India and spread throughout tropical and subtropical regions. Cumin leaves grow wild in mountainous areas and are planted in yards and gardens as a medicinal plant. Cumin leaves can be found in lowland areas up to 1,100 meters above sea level.

• The young roots and stems are coarsely hairy and green.

• The stems of cumin leaves are segmented; when the segments touch the ground, they sprout.

• The leaves are single, thick, fleshy, stalked, and arranged opposite but crisscrossed. Each cumin leaf is oval, with a pointed tip and base, and the edges are serrated to serrated except at the base. The leaf surface has thick, velvety white hairs. The leaves are 5-7 cm long and 4-6 cm wide. When crushed, the cumin leaves have a fragrant aroma.

• Flowers borne on short stalks (short-stalked), pale purple, in 10–20 (or more) densely flowered whorls (cymes), at widely spaced intervals, in long, slender, spike-like racemes. Rachis 10–20 cm (3.9–7.9 in) long, fleshy and hairy. Bracts broadly ovate, 3–4 cm (1.2–1.6 in) long, acute. Calyx bell-shaped, 2–4 mm (0.079–0.157 in) long, hairy and glandular, 5-toothed, the upper tooth broadly ovate-oblong, obtuse, abruptly pointed, the lateral and lower teeth acute. Corolla blue, curved and descending, 8–12 mm (0.31–0.47 in) long, tube 3–4 mm (0.12–0.16 in) long. Flanked trumpet-like; Limbs two-lipped, upper lip short, erect, pubescent, lower lip long, concave. The filaments fuse at the bottom to form a tube around the stylus.

• The seeds (nutlets) are smooth, pale brown, flattened, measuring about 0.7 by 0.5 mm (0.028 by 0.020 in).

• Plant propagation through seeds and cuttings

• Cumin leaves have many properties, including being a carminative, increasing breast milk production, relieving pain (analgesic), reducing fever (antipyretic), and being an antiseptic. Cumin leaves are also used to treat coughs, shortness of breath, mouth ulcers, toothaches, and flatulence.

• essential oil content 0.2%, consisting of carvacrol, isopropyl-0-cresol, phenol, cineole, and potassium.