Tiger stick: a cool drink to relieve summer heat

At first, I heard the name of Polygonum cuspidatum I thought it was a tall tree, but I didn't think it was a shrubby herb of Polygonaceae Fallopia japonica (Houtt.) Ronse decr, also known as pseudochuanqi, tuchuanqi, hongsanqi, or Polygonum japonicum, is produced in East Asia and distributed in areas south of the west of Hokkaido, Korean Peninsula, Taiwan, Jiangsu, Sichuan and other places in China Tiger stick is not high, but it can also grow to 3-4m The stem is hollow with nodes, just like a walking stick, and has triangular leaves The structure is very similar to that of bamboo, but there is no relationship between the two The young leaves of the staff have red stripes Rhizome transverse, lignified, outer skin yellowish brown The leaves are oval or ovate in width, 6-12cm in length and 5-9cm in width, sharp at the top, round or broadly cuneate at the base; the stipules are brown and early set Flowers unisexual, dioecious, panicles axillary; pedicels slender, middle jointed, upper winged; perianth back winged; stamens 8; style 3-lobed, stigma cockscomb Achenes elliptic, 3-sided, dark brown, shiny The flowering period is from June to July, and the fruiting period is from September to October There is such a record in the book of tiger stick that "in June and July, flowers blossom like chrysanthemums, with four petals, and the petals are red like peach flowers They don't fade until the middle of September The root skin is black, and it is yellow after being cut, like willow root " Polygonum cuspidatum is not only for viewing, but also for food Its tender stem is used for vegetables, and its root is used for cold drinks It is named "cold drink" after "cooling in cold water" (better if it's refrigerated) It's a cool tea for summer Its juice can be dyed with rice flour, which has a unique flavor It is also called "sour soup stick" because of its sour taste Polygonum cuspidatum contains Polygonum glycosides, organic acids, glucosides, polysaccharides and other components It has the functions of clearing away heat and toxin, clearing away cold and resolving symptoms, strengthening stomach and clearing food Summer is coming, you can also try this "sour soup"! Tiger stick