Dendrobium primulinum Lindl.

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Morphological characteristics:
Dendrobium primulinum Lindl. drooping, thick fleshy, cylindrical, usually 20-35 cm long, 8-13 mm thick, unbranched, with most nodes, internode length 2-2.5 cm. Leaves papery, two-row, alternate throughout the entire stem, lanceolate or ovate-lanceolate, 8-10.5 cm long, 2-3 cm wide, apex obtuse and unequal 2-lobed, base with papery or membranous Quality of leaf sheaths.
Racemes with 1-3 flowers, usually from the fallen leaves of the upper stem on the section issued; Inflorescence stalk with stem nodes at the boat was concave, 2 mm long, the base is 3-4 long 2- 3 mm membranous sheath; bract pale white, membranous, ovate, 5-9 mm long, apex obtuse; pedicel and ovary yellow-green, 2-2.5 cm long; flowers spreading, drooping, sepals and petals pale rosy ; Sepals narrowly lanceolate, 3 cm long, 6-8 mm wide, apex acute, with 3-5 veins; lateral sepals and sepals of the same shape and large, apex near acute, base askew, with 3 -5-veins; calyx sac narrowly conical, ca. 5 mm, obtuse.
Petals narrowly oblong, 3 cm long, 7-9 cm wide, apex obtuse, with 3-5 veins, entire; lip pale yellow with pale rosy apex, broadly obovate, longer than wide, 3.5 cm wide, Middle and lower sides of the pistils, both sides covered with dense pubescent, margin with irregular serrated, lip disk with purple veins; column white, about 3 mm; cap purple, oval-shaped conical, The top of the number of concave, dense papillary hair, the front edge of the wide concave. Flowering from March to April.
Habitat of origin:
Born in an altitude of 700-1800 meters in the mountain forests in the woods. Production of southeastern Yunnan to the southwest (Wenshan, Simao, Mengla, Menghai, Longling, Zhenkang). Distribution from northwestern India via Nepal, Sikkim, northeastern India, Myanmar, Thailand, Laos, Vietnam. Specimens collected from northeastern India.
Growth Habits:
Dendrobium primulinum Lindl. is a kind of hi-perennial grass herb, like in the warm, humid, annual rainfall of more than 1000 mm, half-shade half-sun environment, the average January temperature above 8 ℃ in the subtropical forests grow deep forest is better , Suitable for growing temperature of 15 to 28 degrees, suitable for growing air humidity above 60%, less demanding on soil fertility, wild and more in the loose and thick bark or trunk growth, and some also grow in the crevice. Is an aerial root, the main requirements of the root permeability is good, the best substrate to breathe air ventilation, in the appropriate temperature and humidity, fast growth, survivability is very strong. Spring and early summer each year, perennial stems on the section of the inflorescence, after flowering stems grow into new stems into stems, autumn and winter into the dormant period