| Country or region name |
Thailand |
| Organism group |
plant |
| Order name |
Cyperales |
| Family name |
Poaceae |
| Species name |
Acrachne racemosa |
| English common name |
goosegrass |
| Substantially same species (synonym) |
|
| Year of invasion or detection |
1985 |
| Native region |
|
| Situation of establishment |
Category 4: Settled after 1951, but not distributed all over the
country |
| Taxonomic description |
| Morphological feature: Culms tufted, erect or geniculately ascending.
Leaf sheaths glabrous, compressed; leaf blades narrowly lanceolate, adaxial
surface tuberculate-pilose at base, tapering to a setaceous apex. Inflorescence
subdigitate or racemes arranged along a central axis; racemes mainly grouped
in pseudo-whorls or pairs, ascending. Spikelets densely imbricate, oblong
with serrate outline, florets 6-20, stramineous at maturity; glumes chartaceous-membranous;
lower glume narrowly oblong, apex acute, mucronate; upper glume lanceolate,
acuminate, awn-pointed; lemmas broadly ovate, keel scabrid, shallowly concave
above middle and excurrent into a stout awn-point, lateral veins fractionally
excurrent. |
| Expansion of distribution area |
There is no record of introduction. The plant was found in Kanchanaburi
province, western Thailand, about 20 years ago.
Today, this plant is abund ant in many upland crops, such as maize, cassava,
sunflower, as well as along roads in Kanchanaburi province. This plant
is also found in other areas not densely populated. |
| Environmental impact |
| |
| Economic damage |
| |
| Reproduction |
| The goosegrass is an annual weed. |
| Growth |
| |
| Countermeasure |
| |
| Writer's name and affiliation |
| © Siriporn Zungsontiporn. Plant Protection Research and Development
Office, Department of Agriculture, Thailand. (Written in May 2005) |
