Polygonum equisetiforme, Horsetail Knotweed,
Hebrew: ארכובית שבטבטית, Arabic: قضاب

Scientific name:  Polygonum equisetiforme Sm.
Common name:  Horsetail Knotweed
Hebrew name:   ארכובית שבטבטית
Arabic name:  قضاب
Family:  Polygonaceae, ארכוביתיים

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Life form:  Hemicryptophyte
Stems:  30-100 cm; procumbent or ascending, numerous, branched
Leaves:  Alternate, oblong to linear, acute, wrinkled margins entire
Inflorescence:  Axillary clusters of 2-3, forming long, usually lax, terminal spikes; herbaceous bracts
Flowers:  Pink, white, 2 - 4 mm in diameter; perianth with 5 partly fused tepals; 8 stamens, white filament, yellow anther; 2-3 styles
Fruits / pods:  Achenes, blackish, glossy, 2-5 mm
Flowering Period:  The whole year
Habitat:  Batha, Phrygana
Distribution:  Mediterranean Woodlands and Shrublands, Semi-steppe shrublands, Shrub-steppes, Deserts and extreme deserts, Montane vegetation of Mt. Hermon
Chorotype:   Med - Irano-Turanian
Summer shedding:  Perenating

Polygonum equisetiforme, Horsetail Knotweed, ארכובית שבטבטית


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.
equisetiforme, equus, a horse; seta, a bristle; Horsetail form.
  • The standard author abbreviation Sm. is used to indicate James Edward Smith (1759 – 1828,an English botanist and founder of the Linnean Society.

Polygonum equisetiforme, Horsetail Knotweed, ארכובית שבטבטית


Polygonum equisetiforme, Horsetail Knotweed, ארכובית שבטבטית
Location: Bene Zion Nature Reserve