Tiger Balm is a perennial herb. Rhizome stout, transverse. Stem erect, 1-2 m tall, stout, hollow, with obvious longitudinal ribs, with small protuberances, glabrous, scattered red or purple-red spots. Leaves broadly ovate or ovate-elliptic, 5-12 cm long, 4-9 cm wide, subleathery, apically acuminate, base broadly cuneate, truncate, or subrounded, margins entire, sparsely raised, glabrous on both surfaces, raised along the nerves; petiole 1-2 cm long, raised; ocrea membranous, oblique, 3-5 mm long, brown, longitudinally veined, glabrous, truncate at the top, ciliate-free, often ruptured, falling early.
Flowers unisexual, dioecious, inflorescences paniculate, 3-8 cm long, axillary; bracts funnelform, 1.5-2 mm long, apically acuminate, unciliate, each bract with 2-4 flowers; pedicels 2-4 mm long, jointed in the middle and lower portion; perianth 5-parted, light green, male perianth segments with a green midvein, wingless, with 8 stamens, longer than the perianth; the outside 3 segments of female perianth segments dorsiventrally winged, with wings extending downward in fruit. Female perianth segments outside 3 dorsally winged, enlarged when fruiting, wings extended and decurrent, styles 3, stigmas fimbriate. Achenes ovate, 3-angled, 4-5 mm long, black-brown, glossy, enclosed in persistent perianth. Fl. [2]
Thujone like warm, humid climate, the soil requirements are not very strict, low-lying flood-prone land can not grow normally. Tiger Balm root system is very developed, drought tolerance, cold tolerance is strong, the stem grows rapidly after greening, grows to a certain height when it begins to branch, the leaves then unfolded, basically reach the annual growth height before flowering.