Invasive Alien Species

Species Name: Gomphrena celosioides

Family Name:
Amaranthaceae
Synonym:
Origin:
South America
Description:
Erect or ascending annual herb, often branched from the base, up to 25 cm tall. Stem finely appressed white hairy, internodes between upper leaves long. Leaves opposite, shortly petioled to sub-sessile, spathulate to oblong-lanceolate, 2-4.5 x 0.5-1.3 cm. Inflorescence bisexual, in terminal, solitary, sessile heads above the top leaves, subtended by 2 bracteoles, initially globose, 1 cm in diameter, later spike- like, 4 cm long; receptacle long-white-woolly; bracts ovate, very acute 3-4 mm; bracteoles long  ovate, very acute, white, 6 mm; perianth 4.5-5.5 mm long, white on a minute knob; tepals narrowly lanceolate, acute, basically long, white, woolly hairy; stamens united   in a staminal tube, slightly shorter than the perianth; ovary compressed, style 0.8-1 mm long, much shorter than the staminal tube. Fruit compressed, indehiscent, 1-seeded, seed irregularly lenticulate, brown, glossy, 1.5 mm long
Invaded Habitat:
Grassy road sides, rail ways,  upland rice fields
Distribution:
Throughout Indonesia except Sumatra, Kalimantan and Sulawesi as far as known
Ecology:
Well adapted to hot, dry and dusty situations at low elevations
References:
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java Vol. I.  N.V. P. Noordhoff. Groningen, Netherlands. 
  2. Pancho, J.V. and S.R. Obien.  1983.  Manual of  Weeds of Tobacco Farms in the Philippines.  Philippine Tobacco Research and Training Center. Mariano Marcos State University.  Batac, Ilocos Norte. 
  3. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta