Articles

Persicaria barbata (L.) H. Hara

Persicaria barbata (L.) H. Hara

Family

Polygonaceae

Synonyms

Polygonum barbatum L.

Vernacular Names

Malaysia

Tebok seludang, johong beraleh, panchis-panchis.

Indonesia Salah nyowo, mengkrengan (Javanese), jukut carang (Sundanese).
Cambodia

Kating he.

Vietnam Ng[eer] tr[aws]ng, ng[eer] r[aa]u.

Geographical Distributions

Persicaria barbata is widely distributed in the tropics and subtropics of Africa, extending to India, Southeast Asia, Australia and Micronesia.

Description

Persicaria barbata is a robust, rhizomatous and perennial herb that can reach up to 40-80 cm tall. The stems are creeping, ascending to erect, loosely branched, smooth or appressed pubescent.

The leaves are oblong to lance-shaped, measuring 8-15 cm x 1.5-3 cm, with acute base and rarely rounded or cordate, acuminate at apex, often with a brown blotch, appressed pubescent on either surface, at least on the veins, or hairless above, with short petiole, with tubular ocrea which is  appressed pubescent and with bristles 1.3-2 cm long on the upper margin. There are 2-8 pseudo-spikes at the top of the stems.  They are long cylindrical, dense or lax, with the longer ones measuring 2-6 cm long which is 3 times longer than the thickness while the older ones are 7-8 mm thick. The lower ones are peduncled with obconical bracts, ciliate, appressed pubescent or hairless and 3-5-flowered.

The flowers are 2-3.3 mm long, white, greenish white or pink, not accrescent after anthesis, with 6-7 stamens and 3 styles.

The nutlet is 1.7 mm long, trigonous, black and shining.

Ecology / Cultivation

Persicaria barbata is common in soggy sunny localities along rivers and ditches, from sea level up to 1200 m altitude.

Line Drawing / Photograph

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References

  1. Plant Resources of South-East Asia No. 12(2): Medicinal and poisonous plants 2.