稻田鸭舌草（Minwhoria。ginallk）是近年来发生日趋严重的杂草之一，一般情况下植株矮小，处于水稻的中下层，但是当田间条件适宜时（水稻缺穴，干湿交替）也可长至水稻中上层。目前有关鸭舌草的专题报道甚少。为了弄清鸭舌草在田间的分布状况，我们于1997年进行了鸭舌草空间 Minwhoria.ginallk is one of the most serious weeds in recent years. Generally, it is short in the middle and lower layers of rice, but when the field conditions are right Grow to the rice in the upper. At present, the topic of Monochoria rarely reported. In order to understand the distribution of Monochoria in the field, we conducted the Monochoria space in 1997