In winter, hemp is full and good in quality; In summer, the loose skin of hemp is poor in quality. Gastrodia elata is moist but not dry, and it mainly enters the liver meridian, and it is better at calming the liver and calming the wind. All the symptoms of liver wind moving and dizziness, regardless of deficiency or excess, are important drugs. The efficacy is to stop wind and spasm, calm the liver and suppress yang, and dispel wind and dredge collaterals. Both winter hemp and summer hemp have this effect, but winter hemp has a good effect.
Morphology of winter hemp
The plant is short, 2-5 cm high, but the fruit period can exceed 50 cm due to the extension of the fruit stalk; Rhizomes are nearly cylindrical, more or less tuberous, 3-5 cm long or sometimes up to 10 cm. The stem is erect, without green leaves, dark brown, with several nodes. Racemes with1-3 flowers; Bracts broadly ovoid, 3-4 mm long; Pedicels and ovaries are10-12 mm long, dark brown with small wart spots; Flowers semi-erect, bell-shaped, dark brown, about1.5 cm long; The perianth tube formed by sepals and petals is about 1 cm long; The outer lobe (sepal free part) spreads out, which is obviously larger than the inner lobe (petal free part); The base of the lip is attached to the foot of the pistil column with broad short claws, and the upper part is nearly wide oval rhombus, about 5 mm long and 6.5 mm wide, with two small keel-like protrusions near the top; There are two spherical calluses on the claw; The lip disc is covered with white hair; The pistil is about 6 mm long, with two small arms at the top and 5.2 mm wide in the middle. It has obvious pistil feet and two spherical calluses on the pistil feet. Both the pedicel and ovary are prolonged in the flower and fruit period. Flowering1feb. The plant is as high as 60 cm; Rhizomes are thick, more or less tuberous, with many coral roots at one end.
The difference between winter hemp and spring hemp
Growth habit of spring hemp: the altitude of the suitable growth area ranges from 600 to 2500 meters. Vertical distribution is related to climatic conditions. Alpine areas are cold and humid in summer, with thick snow in winter, lush trees, thick litter layer and high ground coverage, which are not easy to be frozen. It likes cool climate and humid environment. Growth habit of winter hemp: the root and leaves of gastrodia elata are degenerated and can not engage in photosynthesis, so the tuber growth of gastrodia elata does not need light. Light not only provides heat, but also plays a certain role in the process of flowering, fruiting and seed maturity. Like to grow in loose soil, it needs to contain more humus, good air permeability, good soil structure and drainage performance.
Morphological characteristics are different, and the morphological characteristics of spring hemp are as follows: the plant of spring hemp is short, 7- 12 cm high; Rhizomes are slender, cylindrical, slightly curved, horizontal or sometimes nearly straight. The stems are erect, green and leafless, light brown, with 3-4 amphibian sheaths in the middle and lower parts; The sheath is 6-7 mm long. Morphological characteristics of winter hemp: the plant is short, 2-5 cm high, but the fruit period can exceed 50 cm due to the extension of pedicel; The rhizome is nearly cylindrical, and there are many tubers, 3-5 cm long, sometimes up to 10 cm. The stem is erect, without green leaves, dark brown, with several nodes.