polygonum

po·lyg·o·num

P0424600 (pə-lĭg′ə-nəm)n. Any of numerous plants of the genus Polygonum and several closely related genera of the family Polygonaceae, characterized by stems with knotlike joints and sheathing stipules.

[New Latin Polygonum, genus name, from Greek polugonon, knotgrass : polu-, poly- + gonu, knee; see genu- in Indo-European roots.]

polygonum

(pəˈlɪɡənəm) n (Plants) any polygonaceous plant of the genus Polygonum, having stems with knotlike joints and spikes of small white, green, or pink flowers. Also called (obsolete): polygony See also knotgrass, bistort, prince's feather²[C18: New Latin, from Greek polugonon knotgrass, from polu- poly- + -gonon, from gonu knee]

Thesaurus

Noun

Polygonum - diverse genus of herbs or woody subshrubs of north temperate regionsgenus Polygonumdicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germinationbuckwheat family, family Polygonaceae, Polygonaceae - a family of plants of order Polygonales chiefly of the north temperate zone; includes the buckwheatsChina fleece vine, Polygonum aubertii, Russian vine, silver lace vine - twining perennial vine having racemes of fragrant greenish flowers; western China to Russiabuckwheat, Fagopyrum esculentum, Polygonum fagopyrum - a member of the genus Fagopyrum; annual Asian plant with clusters of small pinkish white flowers and small edible triangular seeds which are used whole or ground into flourkiss-me-over-the-garden-gate, Polygonum orientale, prince's-feather, prince's-plume, princess feather - annual with broadly ovate leaves and slender drooping spikes of crimson flowers; southeastern Asia and Australia; naturalized in North America

Polygonum

knotweed, a genus of annual and perennial herbs, less frequently, semishrubs and shrubs, of the family Polygonaceae. Their stems are erect, prostrate, or sometimes twining. The perianth is usually a corolla of four to six small leaves: there are four to eight stamens and two to three styles. The fruit is triquetrous or lenticular, remaining more or less fully enclosed in the perianth. There are 300 species, mostly found in temperate and tropical regions. In the USSR there are more than 120 species.

From a biological point of view several species are particularly interesting. Willowgrass (Polygonum amphibium) is found in two forms, an aquatic one and one growing in moist places (one form is capable of transforming into the other); serpent grass (P. viviparum) has lower flowers that are mostly turned into bulblets and used for vegetative propagation. Many members of the genus have economic value. Bistort (P. bisunta), peachwort (P. persicaria), knotweed (P. aviculare), and several others are used in medicine. The extract or infusion of the dried terrestrial sterile and fertile stems of water pepper (P. hydropiper) is used as an an-tihemorrhagic substance, primarily in the case of uterine hemorrhages; it is also part of the composition of the antihemorrhoidal “anestezol” suppositories. Middle Asian representatives of the genus known by the name alpine knot-weed (P. alpinum, P. coriarium, and others) are used as tanning substances.

Knotweed. black bindweed (P. convolvulus), and copse knotweed (P. dumetorum), are weeds. The last two species, as well as the cultivated (as an ornamental) fleece flower (P. baldschuanicum), are often distinguished as a separate genus, Bilderdykia. Three species of Polygonum—Sakhalin knotweed. cuspidate knotweed. and Weirich knotweed, all with a large amount of greenery—are good fodder plants. Many members of the genus are good nectar plants. Some species—for example, P. tinctorium—can be used to obtain dyes.

REFERENCES

Atlas lekarstvennykh rastenii SSSR. Moscow, 1962.
Webb, D. A., and A. O. Chater. “Polygonum L.” In Flora Eu-ropaea, vol. 1. Cambridge, 1964.

M. E. KIRPICHNIKOV

polygonum

po·lyg·o·num

polygonum

Polygonum

Polygonum

REFERENCES

Polygonum

Synonyms for Polygonum

noun diverse genus of herbs or woody subshrubs of north temperate regions

Synonyms

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