Persicaria barbata (PROSEA)
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Introduction |
Persicaria barbata (L.) H. Hara
- Protologue: Fl. E. Himal.: 70 (1966).
- Family: Polygonaceae
Persicaria barbata (L.) H. Hara - 1, flowering stem; 2, flower; 3, pistil; 4, ocrea; 5, fruit in perianth; 6, fruit
Synonyms
- Polygonum barbatum L. (1753).
Vernacular names
- Indonesia: salah nyowo, mengkrengan (Javanese), jukut carang (Sundanese)
- Malaysia: tebok seludang, johong beraleh, panchis-panchis
- Cambodia: kating he
- Vietnam: ngể trắng, ngể râu.
Distribution
Widely distributed in the tropics and subtropics of Africa, extending to India, South-East Asia, Australia and Micronesia.
Uses
In Java, the whole plant is used as a fish poison. In northern India, the dried rhizome is employed as an astringent and cooling medicine. In Vietnam, the seeds are used against dysentery and cholera.
Observations
- A robust, rhizomatous, perennial herb, 40-80 cm tall, stems creeping to ascending to erect, loosely branched, glabrous or appressed pubescent.
- Leaves oblong to lanceolate, 8-15 cm × 1.5-3 cm, base acute, rarely rounded or cordate, apex acuminate, often with a brown blotch, appressed pubescent on either surface, at least on the veins, or glabrous above, petiole short, ocrea tubular, appressed pubescent, bristles on upper margin 1.3-2 cm long.
- Pseudo-spikes 2-8 at the top of the stems, long cylindrical, dense or lax, at least the longer ones 3 times longer than thick, 2-6 cm long, older ones 7-8 mm thick, at least lower ones peduncled, bracts obconical, ciliate, appressed pubescent or glabrous, 3-5-flowered.
- Flowers 2-3.3 mm long, white, greenish white or pink, not accrescent after anthesis, stamens 6-7, styles 3.
- Nutlet trigonous, 1.7 mm long, black, shining.
P. barbata is common in soggy sunny localities along rivers and ditches, from sea-level up to 1200 m altitude.
Selected sources
- [74] Backer, C.A. & Bakhuizen van den Brink Jr, R.C., 1964—1968. Flora of Java. 3 volumes. Noordhoff, Groningen, the Netherlands. Vol. 1 (1964) 647 pp., Vol. 2 (1965) 641 pp., Vol. 3 (1968) 761 pp.
- [237] de Guzman, C.C. & Siemonsma, J.S. (Editors), 1999. Plant Resources of South-East Asia No 13. Spices. Backhuys Publishers, Leiden, the Netherlands. 400 pp.
- [455] Huang, T.-C. (Editor), 1993—. Flora of Taiwan. 2nd Edition. Editorial Committee of the Flora of Taiwan, Taipei, Taiwan, Republic of China.
- [602] Lemmens, R.H.M.J. & Wulijarni-Soetjipto, N. (Editors), 1991. Plant Resources of South-East Asia No 3. Dye and tannin-producing plants. Pudoc, Wageningen, the Netherlands. 196 pp.
- [788] Pételot, A., 1952—1954. Les plantes médicinales du Cambodge, du Laos et du Vietnam [The medicinal plants of Cambodia, Laos and Vietnam]. 4 volumes. Centre National de Recherches Scientifiques et Techniques, Saigon, Vietnam.
- [914] Siemonsma, J.S. & Kasem Piluek (Editors), 1993. Plant Resources of South-East Asia No 8. Vegetables. Pudoc Scientific Publishers, Wageningen, the Netherlands. 412 pp.
- [951] Soerjani, M., Kostermans, A.J.G.H. & Tjitrosoepomo, G. (Editors), 1987. Weeds of rice in Indonesia. Balai Pustaka, Jakarta, Indonesia. 716 pp.
Main genus page
Authors
- Nguyen Thi Do