Dendrobium (scientific name: Dendrobium nobile Lindl), also known as ten thousand zhangshu, hanging orchid, Linlan, hairpin Hua and so on. Stem erect, fleshy fat, slightly compressed cylindrical, 10 ~ 60 cm long, thick up to 1.3 cm. Medicinal plant, sweet, light, slightly salty, cold, to the stomach, kidney, lung meridian. Benefiting the stomach and generating fluid, nourishing yin and clearing heat. Used for yin injury and fluid deficiency, dry mouth and thirst, dry vomiting with little food, deficiency heat after illness, dark and unclear eyes. Dendrobium is an elegant, delicate and lovely flower with bright color and fragrant smell, which is regarded as one of the "four ornamental flowers".
Stem erect, fleshy and fertile, slightly compressed cylindrical, 10~60 centimeters long, up to 1.3 centimeters thick, upper more or less reflexive bending, the base is obviously narrowed, unbranched, with many nodes, nodes sometimes slightly swollen; more or less inverted conical nodes, 2~4 centimeters long, drying golden yellow. Leaves leathery, oblong, 6-11 centimeters long, 1-3 centimeters wide, apex obtuse and unequally 2-lobed laterally, base with clasping sheaths.
Racemes from above middle of leafy or deciduous old stems, 2-4 cm long, with 1-4 flowers; peduncle 5-15 mm long, basally sheathed by several tubular sheaths; floral bracts membranous, ovate-lanceolate, 6-13 mm long, acuminate at the apex; pedicel and ovary lilac, 3-6 mm long; flowers large, white with a lilac apex, sometimes pale purplish-red all over or with 1 purplish-red patch on the disk or in addition to the lip. middle sepal oblong, 2.5-3.5 cm long, 1-1.4 cm wide, apex obtuse, with 5 veins; lateral sepals similar to middle sepal, apex acute, base oblique, with 5 veins; calyx capsule conical, 6 mm long; petals ± obliquely broadly ovate, 2.5-3.5 cm long, 1.8-2.5 cm wide, apex obtuse, base shortly clawed, entire, with 3 main claws, apex obtuse. Petals more or less obliquely broadly ovate, 2.5-3.5 cm long, 1.8-2.5 cm wide, apex obtuse, base with purplish-red stripes on both sides and narrowed to a short claw, sides enclosing gynostegium below center, margin with short eyelashes, both surfaces densely covered with short tomentum, labellum with a large purplish-red patch in center of disk; gynostegium green, 5 mm long, slightly enlarged at base with green gynostegium peduncle; Cap purple-red, conical, densely covered with fine papillae, anterior margin with irregularly pointed teeth. Flowering period April to May.