✵The TCM herbalism is also known as pharmaceutics of Traditional Chinese Medicine, or Chinese pharmaceutics, is the branch of health science dealing with the preparation, dispensing, and proper utilization of Chinese herbs. It is majorly composed of Introduction of Chinese Medicinals, Classification of Chinese Herbs, Formulas, and Patent medicines.
Classifications of Herbs:Purgatives Herbs.
Introduction: Purgatives herbs: an agent or substance herbs that promotes defecation or even causes diarrhea, not only for relieving constipation, but also for driving stagnant matter, excessive heat and retained fluid out of the body.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species,  kinds of related insect species, are recorded in this category. These purgatives herbs are briefly introduced separately:
Brief Introduction: The herb Aloe is the dried leaf juice of Aloe barbadensis Mill., Aloe ferox Mill., or related species(family Liliaceae), used (1).as a purgative for constipation, (2).to clear the liver for treating liver fire with dizziness, headache and irritability, and (3).to kill intestinal parasitic worms. The herb is commonly known as Aloe, Lú Huì.
✵Common herbal classics defined the herb Aloes(Lu Hui) as the dried juice of the plant species (1).Aloe vera L.， or (2).Aloe vera L. var. chinensis (Haw.) Berg., or (3).Aloe ferox Mill. They are plant species of the Aloe L. genus, the Liliaceae family of the Liliflorae order. Some other classification systems classified them into the Xanthorrhoeaceae family. These 3 commonly used species are introduced as:
(1).Aloe vera L.: The Aloe vera L., is a plant of the Liliaceae family and Aloe genus, it is commonly known as "Aloe barbadensis miller, or Curacao aloe", a perennial herb. Very short stems. Leaves clustered on top of the stem, erect or nearly erect, hypertrophic and juicy; narrowly lanceolate, 15~36 cm long, 2~6 cm wide, apex long acuminate, base broad, pinkish green, with spiny teeth on the edge. Flowering stems are solitary or slightly branched, 60~90 cm tall; racemes evacuated; flower sinuate, ca. 2.5 cm, yellow or with red spots; perianth tube, 6-lobed, lobes slightly curved outward; 6 stamens, anther t Live; 1 pistil, 3 rooms, each room has a majority of ovules. Capsule, triangular, cracking at the back of the chamber. Its flowering period is from February to March.
Ecological environment: The Aloe vera L., grows in the forest edge, thickets, or sparse forest, also found in the hillside meadow or meadow, bush wood, sandy land. Geographical distribution: This species was native to the northern part of africa and is currently widely cultivated in the west indies islands of South America, it now grows wild in tropical climates around the world and is cultivated in many countries for agricultural and medicinal uses, also cultivated in China. There are 2 varietas of Aloe Vera L. in China, one is Aloe chinensis Baker, another is Shangnong Big-leaf Aloe.
The species is also used for decorative purposes and grows successfully indoors as a potted plant. It is found in many consumer products including beverages, skin lotion, cosmetics, or ointments for minor burns and sunburns.
Trait identification: It is an irregular block of various sizes. Old aloe vera herb shows yellow-brown, red-brown or brown-black; Hard, not easy to break, section wax, dull, not easy to melt when heated. New aloe herb shows brown-black and green, shiny, sticky, easy to melt when heated; Quality crisp, easy to break, broken surface is smooth and glass-like luster; There is a noticeable sour smell, taste extremely bitter.
(2).Aloe vera L. var. chinensis (Haw.) Berg.: The Aloe vera L.var.chinensis(Haw.) Berg., is a plant of the Liliaceae family and Aloe genus, it is commonly known as "Aloe chinensis Baker, or Aloe chinensis Berger", or "Zebra Aloe", it is one varietas of Aloe vera L., perennial herb. Root segmental. Stems are short or stemless. Leaves clustered, spirally arranged, erect, hypertrophy; leaf blade narrowly lanceolate, 10~20 cm long, 1.5~2.5 cm wide, 5-8 mm thick, apex acuminate, base broadly phimosis, margins spicular-dentate, there are markings. Flowering stems are solitary or branched, height 60~90 cm; racemes evacuated; pedicels ca. 2.5 cm; flowers are yellow or purple, with membranous bracts; perianth tube, 6-lobed, lobes slightly curved outward; 6 stamens, sometimes prominent, anthers 2-locule, dorsifixed; ovary superior, 3-locule, style linear. Capsule triangle, about 8 mm long. Its flowering period is from July to August.
Ecological environment: The Aloe vera L.var.chinensis(Haw.) Berg., grows in the sunny grass and wild sunny hillside. Geographical distribution: It is mainly cultivated in Yuanjiang of Yunnan province, the Zhujiang river area, and the southwest area of China, also cultivated in Southeast Asian countries, mainly in areas with more overseas Chinese.
Aloe chinensis Baker grows in well-drained soils that are well-drained and hard to compact. In general, some gravel ash can be added to the soil. It is better to add turfgrass ash. Drainage poor permeability of the soil will block the roots to breathe, rot, and necrosis, but too much sandy soil often causes the loss of water and nutrients, making the aloe poor growth.
Temperature: Aloe chinensis Baker is afraid of the cold. It grows in a frost-free environment throughout the year. The growth is stopped at about 5 °C. At 0 °C, the life process was disturbed. If the temperature is below 0 °C, it would cause frostbite. The most suitable temperature for growth is 15~35 °C and the humidity is 45-85%.
Moisture: Like all plants, Aloe chinensis Baker also needs water, but it is most afraid of stagnant water. In the rainy and humid season or when the drainage is not good, the leaves will easily shrink and the roots will rot and die.
Sunshine: Aloe chinensis Baker needs sufficient sunlight to grow. It should be noted that the newly planted aloe is not suitable for the sun. It is best to see the sun only in the morning. The plant will slowly adapt to thrive in the sun in the next ten days and a half months.
Fertilizer: Fertilizer is indispensable for any plant. Aloe chinensis Baker not only needs NPK(Nitrogen, Phosphorus and Potassium) but also some trace elements. To ensure that aloe vera is a green natural plant, it is necessary to use fermented organic fertilizer as much as possible. Cake, chicken manure and compost can all be used. Manure is more suitable for planting aloe vera.
(3).Aloe ferox Mill.: The Aloe ferox Mill., is a plant of the Liliaceae family and Aloe genus, it is commonly known as "Aloe ferox", "bitter aloe", or "Cape Aloe", "Giant Aloe", "Spiny Aloe", stems are erect, 3~6 meters high, 30~50 leaves, clustered on stem top; leaf blade lanceolate, up to 60~80 cm, width 12 cm, spiny, dark green to blue-green, covered with white powder. Cone-like inflorescences are about 60 cm long; peduncles are about 3 cm long; 6 tepals are tubular, basally commissure, upper part separate, slightly revolute, pale red to yellow-green, with green stripes; 6 stamens, anthers and styles exposed. Fruit.
Ecological environment: The Aloe ferox Mill., grows in rocky areas-on hills, in grassy fynbos, and on the edges of the Karoo. Geographical distribution: This species mainly distributes in Southern Africa, across the southern Cape, from Swellendam and the Overberg District in the west, throughout almost the whole extent of the Eastern Cape Province, eastwards as far as southern KwaZulu-Natal, and northwards into the southern parts of the Free State and Lesotho.
The Aloe ferox Mill., prefer to warm environment, afraid of cold, should be planted throughout the frost-free areas, if frosted, winter cultivation temperature of not less than 5 °C. Aloes are happy and drought-tolerant, requiring soil moisture, fertility, loose air, taboo, avoid clay.