苦草属中有五六个品种,我国已发现三个品种。现仅着重介绍其中优良品种的亚洲苦草:它是典型的沉水草本植物,具有纤细匍匐枝;叶基生,多为细带形,叶薄,叶长短可视水的深浅而定,长达２米左右,叶宽０．５～１厘米,顶端为钝形,有明显的疏细齿,中下部全缘,纵脉三或五条,有许多小横脉? Vallisneria in five or six varieties, China has found three varieties. Now, we only focus on the fine varieties of Asian bitter grass: it is a typical submerged herb plant with slender and stoloniferous branches; leaves basal, mostly faded, leaves thin, leaf length depending on the depth of water, as long as 2 Meters or so, the leaf width of 0.5 to 1 cm, the top is blunt, with obvious sparsely toothed teeth, the lower part of the entire, longitudinal veins three or five, there are many small veins?