Winter Worm Summer Grass

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Yartsa gunbu (winter worm, summer grass) Does anyone know any kind of living thing which is both animal- and plant-like conformation? Today, I will introduce such kind of living thing. We call it dongchong xiacao (winter worm, summer grass)in mandarine. In Tibet, it’s called Yartsa gunbu. Its scientific name is Cordyceps sinensis. It’s also named caterpillar fungus, or Aweto. “Winter worm, summer grass” gets its name from its unique life form of both animal- and plant-like conformation, which is a kind of worm in winter, while it turns into a kind of grass in summer. It mainly grows in highland pastures at the heights of between 3000m to 5000m above sea level in the Himalayan regions. In china, it lives in Qinghai-Tibet Plateau which is in northwest of China. Yartsa gunbu is composed of a larva and sporophore growing on the top of its head. Larvae of moth genus spend up to 5 years underground before pupating. (The fungus attacks the caterpillar, filling the larva’s body and eventually killing and mummifying it). The worm comes from a fungus that spends its whole life living off a moth. It stays with the moth while it lives underground in winter, then breaks through the soil in summer to grow. The larva is 3-5 cm long, 0.3-0.8 cm thick with yellowish brown and coarse surface, have segments with several ring marks and eight pairs of feet present at the abdomen with the middle four pairs more prominent. The sporophore is slender, longer than the larva, deep brown to black, and its top is elliptical. Yartsa gunbu is rich in various microelements, lukewarm in nature and sweet in taste. It has been a very precious component in traditional Chinese medicine. It is thought to improve people’s immunity to all illnesses, such as invigorating lung, liver and kidney functions, improving inspiration to relieve dyspnea, eliminating phlegm, and stopping bleeding. It is

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