I thought it was something. Isn't this an acorn! Oak, also known as oak, is the general name of Quercus plants in FAGACEAE. Acorn is a general term for its fruit, because there are too many kinds of oak, and the fruits vary in size, but this is indeed one of them. I picked it myself in the mountains. We use it here to extract starch, and in summer it is used to make jelly to clear away heat and relieve summer heat.

I really don't know the effect of relieving cough, but I know it has astringent effect, and the effect of treating diarrhea is excellent (personally, taking a lot of antidiarrheal drugs is useless, and the last spoonful of acorn powder solves the problem).