Invasive Alien Species

Species Name: Tridax procumbens

Family Name:
Asteraceae
Synonym:
Origin:
Tropical America
Description:
Perennial herb, with a firm tap root. Branches ascending from a creeping base, 20-75 cm long. Stem cylindrical, often purplish, hairy.  Leaves opposite, thick, ovate-elliptic,  with 2 lateral lobes near the base, 2.5-6 x 2-4 cm, deeply and irregularly serrate, hairy on both surfaces. Flower heads terminal and axillary, 1 2 cm, long- stalked; involucre bell-shaped;  ray flowers 5-6, female, corolla 8-9 mm long, 3-6 –lobed, pale yellow or white; dics flowers numerous, corolla lobes 5, corolla 6-7.5 mm long, bright yellow.  Achenes angular, dark brown to black, densely white long hairy, feathered, unequal in length, 1.8-2.3 mm long .
Invaded Habitat:
Pepper and cotton plantations, rain-fed and upland rice-fields.   Along roads, dikes, rail-roads, riverbanks, cultivated land, meadows, dunes, rain-fed and upland rice fields.
Distribution:
Long ago introduced in Java, collected there for the first time in 1875 and naturalized; introduced elsewhere in Indonesia.
Ecology:
Especially in drier areas, sunny or slightly wet substrata at the elevation of  0-1500 m alt.
References:
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands
  2. Ronoprawiro, S. and R. Rogomulyo.  1988.  Pengendalian Kimiawi Gulma Pada Pertanaman Kapas.  Dalam Prosiding Konferensi HIGI IX.
  3. Soejono, Endang, A. and S. Isniningsih.  1990.  Komunitas Tumbuhan Bawah di antara Tanaman Koleksi Pada Tiga Tingkat Pemeliharaan yang Berbeda.  Dalam Prosiding 1 Konferensi HIGI X. Malang, Indonesia.
  4. Soekarmi, H., I.H. Utomo, J.H. Sardjono.  1992.  Inventarisasi dan Identifikasi Berbagai Jenis Gulma Dominan pada Berbagai Komoditas Andalan Perkebunan di Sulawesi Selatan.  Dalam Prosiding Konferensi HIGI XI.  Ujung Pandang.
  5. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta
  6. Tjitrosoedirdjo, S.S.  2000.  The Asteraceae of  Sumatera. Disertation. Post Graduate Programme, Bogor Agricultural University. Bogor