Basionym : Gomphrena sessilis L.
Synonym : Amaranthus viridis L.
Common name : sessile joyweed.
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Reproduced by seeds and vegetative. Many branched and stolons from the node creep on the ground; fruits are dispersed myrmecochorously.
|Description : ||Terrestrial, annual or perennial, prostrate herb, up to 1 m long, rooting at nodes. Taproot white or brown. Stem rounded, solid, hairy. Stipules absent. Leaves simple, not divided or lobed, opposite, stalked or sessile, elliptic, margin entire, apex acute, base acute, pinnately veined. Flowers bisexual, grouped together in few-flowered glomerules, sessile, white. Fruit nut-like.|
Flowering May to December: fruiting June to January.
Preferably wet soil, along ditches, fallow lands. The plant grows in wet soil in lakes, marshes, irrigation canals and rice field levees and in waterways, up to 1,250 m altitude.
Cultivation favours A. sessilis emergence, and is a useful means of killing seedlings before sowing rice.
Amitrole is very effective. Reasonably effective are 2,4-D for broadleaved weeds (1-1.5kg a.i./ha in 200 liters of water) and MCPA (0.5-1 kg a.i./ha in 200 liters of water ), but repeated applications are necessary.
A. gracilis is used as vegetable. Pig's food.
- Lavit Kham, 2004. Medicinal plants of Cambodia.
- Soerjani M., Kostermans A. J. G. H., Tjitrosoepomo G. 1987. Weeds of rice in Indonesia. Balai Pustaka. Jakarta.
- Tavatchai Radanachaless, J.F.Maxwell. 1994. Weeds of soybean fields in Thailand. Multiple Cropping, Center Publications. Thailand.
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