Dendrobium wardianum Warner

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Dendrobium wardianum Warner grows on the trunk of a sparse forest at an altitude of 1350-1900 m.Distribution China yunnan, Bhutan, northeast India, myanmar, Thailand, Vietnam.This flower is cultivated and has high horticultural value.
Morphological characteristics:
Stems oblique or pendulous, fleshy and fleshy, cylindrical, usually 16-46 cm long, 7-15 mm thick, unbranched, with nodes;Internodes somewhat swollen club-like, 2-4 cm long, yellowish and stained black after dry.Leaves thinly leathery, bilobal, narrowly oblong, 5.5-15 cm long, 1.7-2 cm wide, apex acute, base sheathed;Leaf sheaths cling to the stem, often open after dry mouth.
Racemes from upper middle part of old stems deciduous, with 1-3 flowers;Inflorescences petiole stout, 2-5 mm long, base with 3-4 broadly ovate sheaths;Bracts papery, large, broadly ovate, 2-3 cm long by 1.5 cm wide, apex nearly circular;Pedicel and ovary white with lilac red, ca. 5 mm;Flowers large, spreading, white with purple apex;Middle sepal oblong, 4.5 cm long, 1.8 cm wide, apex obtuse, with 8 — 9 main veins and many subtransverse branches;Lateral sepals to middle sepals subequal, apex obtuse, base slightly askew, with 8-9 main veins and many subtransverse branches;Calyx capsule subglobose, ca. 5 mm.
Petals broadly oblong, as long as middle sepals and wider, to 2.8 cm, apex obtuse, base with short claws, with 5 main veins and many branches;Lower sepal white with purplish apex, broadly ovate, ca. 3.5 cm long, 3.2 cm wide, surrounded by pistil on both sides below the middle, apex rounded, base golden and short clawed, densely covered with short hairs on both sides, one dark purple patch on each side of the labellum;Pistil ca. 5 mm, base dilated;Drug cap wide conical, glabrous, anterior margin with irregular teeth.Flowering from march to may.
Growth habit:
Dendrobium wardianum Warner is a perennial herbaceous plants, like a cool and pleasant in warm, wet, at more than 1000 mm annual rainfall, Yin and Yang, the environment of suitable growth temperature of 15 to 28 degrees, is suitable for growth of air humidity of 60% above, not very strict with techniques namely, wild in loose and thick bark or more trunk growth, and some also grown in the cleft.It is an aerial rooting system, which mainly requires good root permeability, and the substrate used should be able to ventilate and filter water. Under the appropriate temperature and humidity, the growth speed is fast and the survival ability is very strong.In late spring and early summer every year, inflorescence is extracted from the upper segment of biennial stem.