Polygonum aviculare, Polygonum arenastrum,
Common knotweed, Prostrate knotweed, Doorweed, Knotgrass,
Wiregrass, Yard knotweed,
Hebrew: ארכובית הציפורים, Arabic: بطباط الطيور

Scientific name:  Polygonum aviculare L.
Synonym name:  Polygonum arenastrum Boreau
Common name:  Common knotweed, Prostrate knotweed, doorweed, knotgrass, wiregrass, yard knotweed
Hebrew name:   ארכובית הציפורים
Arabic name:   بطباط الطيور
Family:  Polygonaceae, ארכוביתיים

Polygonum aviculare, Polygonum arenastrum, Common knotweed,بطباط الطيور, ארכובית הציפורים

Life form:  Annual, therophyte
Stems:  Mat-forming, 10-122 cm in diameter; prostate to erect, 5-200 cm long, many-branched
Leaves:  Alternate, entire
Inflorescence:  Axillary fascicle of small flowers, inconspicuous, 1-6 flowered, on upper part of plant; pedicels jointed, 1-4 mm long; bracts with well-developed blades
Flowers:  Bisexual, pink, white
Fruits / pods:  Achenes, 1.7-4.0 mm long
Flowering Period:   March, April, May, June, July, August, September, October
Habitat:   Disturbed habitats
Distribution:  Mediterranean Woodlands and Shrublands, Semi-steppe shrublands, Shrub-steppes, Deserts and extreme deserts, Montane vegetation of Mt. Hermon
Chorotype:   Plurireginalbor-trop
Summer shedding:  Ephemeral

Polygonum aviculare, Polygonum arenastrum, Common knotweed, ארכובית הציפורים


Derivation of the botanical name:
Polygonum, polys, πολυϛ, πολλη, πολυ, much, many, frequent; large; heavy; gonu, a knee-joint; from the many joints in the stem.
aviculare, avisbird; relating to small birds.
arenastrum, resembling the genus Arenaria.
ארכובית הציפורים, arkovit ha’tsiporim (Hebrew), 'bird’s polygonum', because of its seeds, much loved by birds.
  • The standard author abbreviation L. is used to indicate Carl Linnaeus (1707 – 1778), a Swedish botanist, physician, and zoologist, the father of modern taxonomy.
  • The standard author abbreviation Boreau is used to indicate Alexandre Boreau (1803 – 1875), a French pharmacist and botanist.