Ageratum conyzoides (PROSEA)

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Plant Resources of South-East Asia
List of species

Ageratum conyzoides L.

Protologue: Sp. pl. 2: 839 (1753).

Vernacular names

  • Goatweed (En). Eupatoire bleue (Fr)
  • Indonesia: babadotan (Sundanese), wedusan (Javanese), dus-bedusan (Madurese)
  • Malaysia: tahi anjing, rumput pereh jarang, rumput sekedok (Peninsular)
  • Philippines: bulak-manok (Tagalog), singilan (Iloko), bahug-bahug (Panay Bisaya)
  • Thailand: thiam mae haang (Loei), saapraeng saapkaa (Chiang Mai), ya saap raeng (Ratchaburi)
  • Vietnam: cây bông cứt heo, cây hoa cứt lợn, cây bông thúi.


Originating from Central and South America, but now a pantropical weed that is very common throughout India, Burma (Myanmar), Indo-China, southern China, Thailand and Malesia.


The most widespread medicinal uses are externally to heal wounds and to treat skin diseases, and internally to treat diarrhoea, as a febrifuge and as an anti-allergenic agent. The plant yields an insecticide. It is sometimes planted as a ground cover in plantations, e.g. of rubber and citrus.


An annual erect herb, at the base sometimes decumbent and rooting, up to 120(-150) cm tall, stems with rather long hairs on the nodes and younger parts; leaves ovate, triangular-ovate or rhomboid-ovate, (0.5-)1-10 cm × 0.5-7 cm, with obtuse or rounded base; head 4-6 mm long, 60-75-flowered, outermost involucral bracts beset with only simple eglandular hairs, inner involucral bracts with abruptly contracted apex; corolla 1-2.5 mm long; fruit glabrous or very sparingly hairy. A. conyzoides is very common in fields, roadsides and waste places up to 2500 m altitude.

Selected sources

18, 96, 156, 202, 332, 350, 383, 495,496, 549, 580, 597, 614, 616, 685, 713, 876, 928, 929, 996, 1034, 1035, 1090, 1126, 1131, 1178, 1246, 1268, 1294, 1324, 1386, 1408, 1517, 1570, 1593, 1659.


Slamet Sutanti Budi Rahayu, Rina Ratnasih Irwanto & L.J.G. van der Maesen