In China the tea shrub is grown chiefly on the southern slopes of hills in poor, well watered soil, to which manure is applied. The seeds are dropped in holes at regular intervals, and during the third year the first crop is obtained. In from seven to ten years the shrubs are cut down and shoots spring up from the stumps, which continue to yield crops of leaves. A single plant produces on an average between three hundred and three hundred and fifty pounds of dried leaves. The leaves are picked three times a year, in April, May, and June or July. The young, tender leaves of the first gathering make the best tea, and this is very largely consumed in its native country. The older leaves of the second and third pickings make a poorer quality of tea which abounds in tannin,[8] and contains but a small per cent. of the best elements of superior tea. It was long supposed that black and green sorts of tea were made from distinct varieties, or even species of plants; in fact, there has been a great deal of mystery surrounding the culture and preparation of tea until within the past score of years. Authorities now state that there is only one species of plant yielding tea leaves, and from this all sorts are made. The differences are natural, being some of them due to climate and conditions of soil, etc., while others are the result of the manipulation of the leaves after they are gathered. Black and green tea may come from the same shrub, or even the same branch of a plant. The leaves forming black tea undergo a fermentation before they are dried, while those designed for green tea are at once submitted to a high heat in iron pans, and not copper pans, as generally supposed. After the leaves for black tea have been gathered they are placed in heaps, when they become flaccid and turn dark from incipient fermentation. The leaves are then rolled between the thumb and fingers or upon bamboo tables until the desired twist is obtained. They next pass to a drying room and are heated in an iron pan; again twisted, and afterward dried over a slow fire. The principal difference between the preparation of black and green tea is that in the latter the freshly gathered leaves go at once into the heated pans. The repeated twisting and heating is nearly the same with both classes. The green teas are sometimes artificially colored by using turmeric[9] with gypsum or Prussian blue. A flavor is frequently given to the tea by adding aromatic flowers, as those of the pekoe and caper.[10] Among the leading varieties of black tea are: Bohea, a small leaf, crisp and strong odor, with brackish taste; two sorts of Congous—the large leaf with fine flavor, and the small leaf with a burnt smell. The Souchong is the much prized “English Breakfast,” made from leaves of three-year-old trees. Only a small part of the so-called Souchong is genuine. Pekoe is made from the tenderest leaves gathered from three-year-old plants while in bloom.