Bearded Knotweed
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Bearded Knotweed
ative Photo: Gurcharan Singh
Common name: Bearded Knotweed, water milkwort • Adi: Rukji • Bengali: bekh-unjubaz • Kannada: konde malle, kondemalle • Malayalam: belutta-modela-mucca • Manipuri: ꯌꯦꯂꯥꯡ যেলাঙ Yelang • Marathi: dhaktasheral • Mizo: anbawng • Nepali: बिश Bish • Tamil: niralari, neer alari • Telugu: kondamalle, neeruganneru
Botanical name: Persicaria barbata    Family: Polygonaceae (Knotweed family)
Synonyms: Polygonum barbatum

Bearded Knotweed is an erect annual herb, 30-60 cm tall, sometimes prostrate simple-branched, annual, herb. Stem is hairless, lineolate-grooved. Leaves are 1.5-15 x 0.25-3.0 cm, elliptic-lanceshaped to lanceshaped, long-pointed, hairless except margin, Stalkless or leaf-stalk 2-4 mm long. Ochrea are 1.0-3.5 cm long, tubular, brownish, bristly, cilia equalling or larger than the ochreae. Inflorescence is 5-10 cm long, many flowered, branched raceme with 1-6 spikes in each raceme, flower-cluster-stalk 0.5-3.0 cm long, hairless. Flowers are white, 1.0-2.0 mm across, stalk 0.75-1.5 mm long. Ochreolae is 1.5-3.5 mm long, tubular, ovate, compact, not intrerrupted, fringed with hairs, ciliae almost the same size as that of ochreolae. Tepals are 5, 1.5-2.5 x 0.75-1.25 cm, inverted-lanceshaped-obovate, blunt, biseriate, unequal, eglandular. Bearded Knotweed is found in Bhutan, NE India, SE Asia, Sri Lanka and Western Ghats, from sea level to 1300 m.

Identification credit: Gurcharan Singh Photographed in Delhi & Arunachal Pradesh.

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