Invasive Alien Species

Species Name: Borreria repens

Family Name:
Rubiaceae
Synonym:
Origin:
Tropical America
Description:
Annual or perennial, erect or ascending, 5-40 cm tall.  Stem 4-angled, long haired; stipules interpetiolar, forming a thin sheath, apically divided into very narrow lobes. Leaves opposite, very shortly petioled, elliptic to oblong-elliptic or ovate, 0.8-3.5 x 0.3-1.5 cm, bright green, the 2 or 3 upper pairs of leaves usually close together. Inflorescences small, bisexual, actinomorphic, in many-flowered, axillary and terminal bundles; calyx-lobes 2; inserted on the two narrow sides of the compressed ovary, glabrous; corolla 0.75mm long; lobes with not very numerous hairs; stamens inserted slightly above the base of the corolla; filaments and anthers minute, enclosed; fruit 1-2 mm long, sparsely covered with short, thick hairs; seeds with a narrow groove.
Invaded Habitat:
Oil palm plantations, upland and tidal rice fields, grassland, grassy roadsides, under bamboo, sulphate acid soil, tidal areas,  village grooves, particularly in damp shaded sites, nowhere widespread.
Distribution:
Throughout Indonesia, except Sulawesi and the Moluccas, as far as known.
Ecology:
In Java grow well up to 1000 m alt. Flowers throughout the year.
References:
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java Vol. II.  N.V. P. Noordhoff. Groningen, Netherlands
  2. Budiman, A., M. Thamrin and S. Asikin.  1988.   Beberapa Jenis Gulma di Lahan Pasang Surut Kalimantan Selatan dan Tengah dengan Tingkat Kemasaman Tanah Yang Berbeda.  Prosiding Konferensi HIGI IX.
  3. Budiman, A., S. Asikin and N. Jahab.  1992.  Aplikasi Herbisida Pratumbuh dan Jarak Tanam untuk Mengendalikan Gulma pada Kacang Tanah di Lahan Kering.  Prosiding Konferensi HIGI XI.  Ujung Pandang.
  4. Muditha, I.G., H. Simbolon and Roemantyo.  1988.  Komunitas Gulma Pada Berbagai Keadaan Lingkungan III. Komposisi Jenis Gulma Pada Berbagai Tipe Lapangan Rumput dan Jalan Gicok.  Dalam Prosiding Konferensi HIGI IX.
  5. Soekarmi, H., I.H. Utomo, J.H. Sardjono.  1992.  Inventarisasi dan Identifikasi Berbagai Jenis Gulma Dominan pada Berbagai Komoditas Andalan Perkebunan di Sulawesi Selatan.  Prosiding Konferensi HIGI XI.  Ujung Pandang.
  6. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta
  7. Supriyo, A., B. Prayudi, S. Zulaikha.  Pengaruh Cara pengendalian Gulma terhadap Pertumbuhan Gulma dan Hasil Kedelai pada Tanah Sulfat Masam.  Prosiding Konferensi HIGI XI.  Ujung Pandang.