Introduction of Ya Zhi Cao:Common Dayflower Herb or Herba Commelinae.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Common Dayflower Herb, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Commelina communis L., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Common Dayflower Herb, its pharmacological actions, medicinal efficacy, and administration guide.

Herba Commelinae(Common Dayflower Herb).

Commelina communis:flower Pin Yin Name: Yā Zhí Cǎo.
 English Name: Common Dayflower Herb.
 Latin Name: Herba Commelinae.
 Property and flavor: cold, sweet, tasteless.

 Brief introduction: The herb Herba Commelinae is the dried aerial part of Commelina communis L.(family Commelianceae), used (1).to clear heat and counteract toxins for treating warm diseases, boils, sores, and painful swelling of the throat, and (2).to induce diuresis in cases of edema and heat stranguria. The herb is commonly known as Herba Commelinae, Common Dayflower Herb, Yā Zhí Cǎo.

 Botanical source: Common herbal classics and official herbal classics defined the herb Herba Commelinae(Common Dayflower Herb) as the dried aerial part of (1). Commelina communis L. It is a plant of the Commelina L. genus, Commelinaceae family, Farinosae order plant. This commonly used species is introduced as:

(1).Commelina communis L.

 Commelina communis L.:flowering plant Botanical description: It is commonly known as Yā Zhí Cǎo(literally it means Duck Foot Sole Grass) or Common Dayflower Herb, annual herb. 15~60 cm high. Many roots. Stem much branched, with longitudinal ribs, base prostrate, upper erect, leaf sheath and upper part of stem covered with short hairs. Leaves alternate, sessile or subsessile; Leaf blade ovoid lanceolate or lanceolate, 4~10 cm long, 1~3 cm wide, apex acuminate, base deciduous into a membranous sheath, clasped, entire involucre flaccid, stalk 1.5~4 cm long, opposite leaves, cordate, slightly sickle curved, apex short acute, 1.5~2.4 cm long, margin often hirsute. Cymes on upper branches, 3~4 flowers, with short pedicels, bearing the lowest part of branches, 1 flower, pedicels ca. 8 mm; 3 sepals, ovate, ca. 5 mm long, ca. 3 mm wide, membranous; 3 petals, dark blue, 1 smaller ovate, ca. 9 mm long, 2 larger subcircular, clawed, ca. 15 mm long; 6 stamens, can breed 3, filament length about 13 mm, 3 steriles, filament shorter, glabrous, apex butterfly shape; 1 pistil, ovary subequal, ovate, style filiform and long. Capsule elliptic, 5~7 mm long, 2-locule, 2-lobed, 2 seeds per loculus. Seeds are 2~3 mm long, surface uneven, with a white dot. Its flowering period is from July to September, fruiting from September to October.

 Commelina communis L.:flowering Ecological environment: The plant grows in the humid shade area at an altitude of 100~2,400 meters above sea level, it grows in a gully, roadside, field ridge, wasteland, house side corner, hillside, and forest edge grass. The plant distributes in most of the north and south areas of China.

 Growth characteristics: The plant commelina communis prefers a warm and humid climate, cold resistance, it can be planted in the damp field, stream, near the village and back of the house.

 Common Dayflower Herb:herb photo Characters of herbs: The whole plant grows to 60 cm long, yellow-green or yellow-white, the old stem is slightly square, the surface is smooth, it has several longitudinal edges, the diameter is about 2 mm, the nodes are slightly enlarged, there are many branches or fibrous roots in the basal nodes, and the internodes are 3 ~ 9 cm long. The fracture surface is solid, with pith in the center. Leaves are alternate, crumpled, thin and fragile; After flattening, the intact leaves are ovate-lanceolate or lanceolate, 3~9 cm long and 1~3 cm wide, with sharp apex, entire edge, the base grows downward and form the membranous sheath, clasping stems and leaf veins are parallel. Cymes, involucres are heart-shaped, ovate, folded, edges are not mutually marginal; Flowers mostly fall off, sepals are membranous, petals are blue-black. The herb has a slight odor, it tastes sweet and mild. The herb which is yellow-green is better.

 Pharmacological actions: ①.obvious antipyretic effect; ②.inhibitory effect on Staphylococcus aureus in vitro.

 Commelina communis L.:flowering Medicinal efficacy: Clear heat and detoxify, alleviate water retention and detumescence(reduce swelling). It is indicated for wind-fever cold, persistent fever, febrile disease and fever, sore throat and swelling, edema, oliguria, pyretic stranguria with pain, carbuncle and malignant boil, etc.

 Administration of Herba Commelinae(Yā Zhí Cǎo): 
Reference: Administration Guide of Herba Commelinae(Yā Zhí Cǎo)
TCM Books: ①.Internally:15~30 grams,fresh herb 60~90 grams.Externally:proper amount;②.Internally:water decoction, 3~5 qian(about 9~15 grams),fresh herb 2~3 liang(about 60~90 grams),big dosage could be up to 5~7 liang(about 150~210 grams), or extract juice.Externally:mashed and apply stick,or extract juice and drip to the throat;③.Internally:water decoction, 15~30 grams, fresh herb 60~90 grams, or extract juice.Externally:proper amount, mashed and apply stick.

Herbs Clearing Heat and Counteracting Toxins.

 Introduction: Herbs Clearing Heat and Counteracting Toxins: an agent or substance herbs that counteracts heat toxins or fire toxins, mainly indicated in the treatment of boils, sores, abscess, erysipelas, epidemic infectious diseases, mumps, dysentery, insect or snake bite, and burns.
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