✵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:Diuretics and Hydragogues Herbs:Herbs Diuretics.
Introduction: Herbs Diuretics: also known as damp-draining diuretic herbs,an agent or substance herbs that increases urine excretion and water discharge for treating internal retention of dampness.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species,  kinds of related fungus species,  kinds of related insect species,  kind of related mineral are recorded in this category. These Diuretics and Hydragogues Herbs:Herbs Diuretics are briefly introduced separately:
Medulla Junci(Common Rush).
Brief Introduction: The herb Medulla Junci is the dried pith of Juncus effusus L.(family Junaceae), used (1).to induce diuresis for treating heat stranguria, and (2).to calm the mind for relieving fidgetiness and insomnia. The herb is commonly known as Medulla Junci, Common Rush, Dēnɡ Xīn Cǎo.
✵Official herbal classics and other famous herbal classics defined the herb Medulla Junci(Common Rush) as the dried pith of the species (1).Juncus effusus L. It is a plant of the Juncus L. genus, the Juncaceae family of the Liliflorae order. This commonly used species is introduced as:
(1).Juncus effusus L.: It is commonly known as Dēnɡ Xīn Cǎo. Perennial herb, 40~100 cm tall. Rhizome horizontal walk, dense hair root. Stems clustered, erect, slender columnar, 1.5~4 mm in diameter, indumescent with milky pulp, a large part of the stem. Leaf-sheath reddish-brown or pale yellow, up to 15 cm long; Leaf degeneracy is spiny. Inflorescences pseudolateral, cymose, flowery, dense or diffuse; Bracts 5~20 cm long in connection with stem; Flowers pale green, with short stalks, 2~2.5 mm long; 6 perianth segments, striate lanceolate, arranged in 2-wheel, outer wheel slightly longer, margin membranous, abaxially pilose; 3 stamens or rarely 6, about 2/3 of perianth long, anthers slightly shorter than filaments; 1 pistil, ovary superior, 3-locule, style very short 3 stigmas. Capsule oblong, apex obtuse or concave, ca. As long as perianth or slightly longer, with 3 intact septa. Seeds numerous, ovoid oblong, brown, ca. 0.4 mm long. Its flowering period is from June to July, fruiting from July to October.
Ecological environment: The plant grows in wet places, such as water and field. It distributes in the lower reaches of the Yangtze river and northwest, southwest area of China.
Trait identification:The herb is thin cylindrical, up to 90 cm, 1~3 mm in diameter, white or yellowish-white surface. Under the magnifying glass, there are fine ridges and spongy pores. Slightly shiny. Light soft, elastic, easy to break, section uneven, white. The smell is not noticeable. Long, thick, white and elastic. Microscopic identification of stem pulp cross-section: all composed of aerenchyma. Each cell is square or rectangular, with several branches. The branches are 8~60 microns long, 7~20 microns in diameter, and 1.7 microns in wall thickness.