Agrostis monostachya Poir.
Hymenachne acutigluma (Steud.) Gilliland
Hymenachne calamitosa J.R.Clarkson
Hymenachne gouinii E.Fourn.
Hymenachne monostachya (Poir.) P.Beauv.
Hymenachne pseudointerrupta Müll.Hal.
Panicum acuminatum Salzm. ex Döll
Panicum acutiglume Steud.
Panicum amplexicaule Rudge
Panicum auritum Hassk.
Panicum caudatum Willd. ex Steud.
Panicum grisebachianum Mez
Panicum hasskarlii Steud. ex Zoll.
Panicum hymenachne Desv.
Panicum myurum G.Mey.
Panicum perdensum Steud.
Sporobolus villosus Hochst. ex Döll
Hymenachne amplexicaulis is a perennial, evergreen grass with robust, decumbent stems 200 - 350cm long that root and form new growth at the lower nodes. Plants can spread freely to form large clumps.
The plant is sometimes harvsted from the wild for local use as a wick. It has potential as a nutrient sink and sediment trap in situations polluted by habitation and cultivation.
S. America - All countries other than Chile; C. America - Panama to Mexico; Caribbean.
A semi-aquatic plant in open swamps and ditches from sea-level up to 1,200 metres[
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A plant of moister areas of the tropics and subtropics, growing in areas of high rainfall at elevations up to 1,200 metres[
Requires a sunny position, being intolerant of shade[
]. The plant is adapted to acid soils in peat swamps having a pH in the range 4 - 4.8[
]. It can tolerate water up to 1 metre deep, but is better adapted to seasonal immersion than to permanent water[
Sometimes the plant becomes a troublesome weed, especially in Asia and Australia, where it can be found in wetlands, flood plains, irrigation systems, water storage facilities, irrigated rice and sugar cane crops[
]. It spreads by means of by seed and broken stem fragments. Each flower head can produce over 4000 viable seeds - these can survive in water and are spread during annual flooding events and in mud attached to the fur or hooves of animals. Waterbirds may also be responsible for spreading seed. Broken stem fragments can be carried to new locations by floodwaters, and then take root in moist soil.
The plant has been proposed as a nutrient sink and sediment trap in situations polluted by habitation and cultivation[
The pith of the culms is used for making lamp wicks[
Seed - best sown in situ as soon as it is ripe. Seed viability declines fairly quickly under ambient storage conditions in the tropics (20 - 30°c), from an initial 98% to 10% over a period of 16 months[
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