Common persicaria. Pepper plant herb

Common persicaria. Pepper plant herb

Common persicaria. Pepper plant herb

Specification & Spread

Common persicaria herb — herba polygoni persicariae
Common persicaria — persicaria maculata (rafin.) S.f. gray ( = polygonum persicaria l.)
Buckwheat family — polygonaceae
Other names: lady’s thumb, lover’s-pride, redweed, spotted knot-weed.

It is an annual herb 30-60 cm tall.
The stem is erect or ascending, knotted.
The leaves are alternate, lanceolate, entire, bare, narrowed into a short petiole. In the middle of the leaf blade is often a reddish-brown spot, disappearing during drying.
The ratruba is narrow, tightly covering the stem, pubescent, on the edge with long cilia. The flowers are gathered in dense erect dense spike inflorescences.
The perianth is simple, often pink, less often whitish.
The fruit is a broadly oily black shiny nut.

Spreading. It is widely spread in the European part of the country and in the Caucasus. In Siberia, Central Asia and the Far East is rare.

Habitat. On damp lowland meadows, along river banks and in ditches, on wet arable land, in gardens and in vegetable gardens. It is a widespread weed.


The chemical composition of common persicaria herb

The main active ingredients of the herb of common persicaria are flavonoids:

  • avkulyarin,
  • hyperoside,
  • quercitrin and
  • isoquercitrin.

There are also found:

  • tannins,
  • vitamin K1,
  • ascorbic acid.

Harvesting and storage of raw materials

Harvesting.The herb is harvested in the flowering phase, cutting off with a sickle or shears leafy flowering tops of shoots up to 40 cm long, without coarse lower parts. In dense thickets, the herb is mowed with a scythe. The harvested herb is cleaned from the earth, impurities, yellowed, affected by pests and diseases of the plant parts.

Security measures. For renewal of thickets it is necessary to leave several well-developed plants for every 2-3 m2 of thickets.

Drying. It is dried in attics under an iron roof or under sheds, spreading out a thin layer (no thicker than 5 cm) on paper or cloth and often turning it over. With slow drying, the raw materials turn black. It is preferable to carry out drying in dryers with artificial heating at a temperature not higher than 40-50 ºС.

Storage. It is stored in dry, well-ventilated areas, packed in bales or bags.

Whole raw materials

Solid or partially crushed flowering leafy shoots up to 40 cm long without coarse lower parts, with fruits of different degrees of maturity.
The stems are branched or simple, longitudinally striated, with swollen nodes.
The leaves are alternate, short-petiolate, lanceolate, long-pointed with a wedge-shaped base, on the upper side with a dark spot or without it, entire, up to 16 cm long, up to 2.5 cm wide. , on the upper edge with cilia length from 0.2 to 4.5 mm. The inflorescences are dense apical spiciform racemes.
The flowers are small, with a simple deeply 4-5-dissected perianth, about 2-3 (5) mm long. The perianth segments and peduncle are with single glands (under a magnifying glass).
The fruits are triangular, lenticular or flat on one or both sides, nuts 2.2-2.9 mm long, 1.6-2 mm wide, shiny, black or dark brown.
The colour of the stems is green, sometimes with a brownish tinge; the leaves from the upper side are green, from the bottom – greyish-green; the perianth – pink, less white, greenish at base.
The smell is absent. The taste is bitter.

Milled raw materials

The pieces of stems, leaves, inflorescences of various shapes, passing through a sieve with holes of 7 mm in diameter.
The colour is green and brownish green.
The smell is absent. The taste is bitter.


When harvesting the raw materials, it is necessary to be able to distinguish common persicaria from the closely related species, the herb of which is not to be harvested.

Dock-leaved persicaria (Persicaria scabra (Moench) Mold. = Polygonum scabrum (Moench) is distinguished by wide, not tightly fitting to the stalk, bare or pubescent sockets, on the edge without cilia or with occasional short cilia. The inflorescences are short, dull, erect spiciform racemes; the perianth is greenish white; the fruit is rounded, usually protrudes from the perianth.

Spreading persicaria(city of oxaluliac) (Persicaria lapathifolia (L.) S.F. Grey = Polygonum lapathifolium L.) is characterized by wide, bare, less often pubescent bells, on the edge without eyelashes or with rare short cilia. The inflorescences are elongated, drooping spiciform racemes; the perianth is pink or whitish; the fruit is ovoid, usually completely hidden in the perianth.

Properties and application

The pharmacological properties of common persicaria

The infusion and liquid extract of common persicaria herb:

  • narrow vessels
  • increase blood clotting and viscosity
  • strengthen the contractions of the uterus,
  • increase the minute volume and
  • strengthen the contraction of the heart.

Common persicaria possesses:

  • diuretic and
  • laxative effect.

Application of common persicaria

The infusion of common persicaria herb is prescribed:

  • patients suffering from proctogenic constipation,
  • hemorrhoids,
  • fissures of the rectum with frequent hemorrhoidal bleeding.

Under the influence of common persicaria:

  • normal physiological functions,
  • blood discharge from the rectum decreases or disappears,
  • inflammation in it.

Microclysters from the infusion of herbs are applied.
The infusion is used in gynecological practice:

  • patients with uterine bleeding on the basis of hormonal dysfunctions,
  • with fibromatosis of the uterus. When algomenorrhea common persicaria has some analgesic effect.

The infusion is used for douching with colpitis.

Individual intolerance to the components. Common persicaria is contraindicated in pregnancy.

Increased blood clotting; tendency to thrombosis.