Dendrobium candidum, upright stem, cylindrical, 9-35 cm long, 2-4 mm thick, unbranched, segmented; Leaves in 2 rows, papery, oblong-lanceolate, with edges and edges usually pale purple. Racemes are usually produced on the upper part of old stems that fall leaves every year and have 2-3 flowers.
Bracts are dry and membranous, pale white, oval, 5-7 mm long, sepals and petals are yellowish green, nearly similar, oblong-lanceolate, lip white, green or yellow callose at the base, oval-lanceolate, slightly shorter than sepals, and inverted in the middle. Stamens are yellow-green, about 3 mm long, with 1 purple spots on both sides of the top; The cap is white, rectangular and triangular, about 2.3 mm long, with a subapical tip and 2-lobed. Flowering from March to June.
It occurs on semi-humid rocks in mountainous areas above 1600 meters above sea level. Mainly distributed in Anhui, Zhejiang, Fujian and other provinces. Its stem can be used as medicine.
Extended data:
Amino acids, polysaccharides, alkaloids and other components in Dendrobium candidum have the functions of improving immunity and delaying aging. Since 1987, the wild Dendrobium candidum has been a national third-class rare and endangered protected plant because of its low natural reproduction rate.
At present, many local organizations in China are developing middle-aged seedlings. The polysaccharide content of cultivated Dendrobium candidum is similar to that of wild Dendrobium candidum, the composition and content of various amino acids are consistent, and the content of trace elements is similar.
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