Caryopsis (grain) (pl.caryopses) A dry indehiscent fruit, typical of the grasses. It is similar to an ACHENE except that颖果：一种不开裂的干果，是禾本科植物特有的果实类型。与瘦果相似，不同点在于颖果的果皮和种皮紧密愈合不易分离。
Caryopsis Micromorphology of Eleusine Gaertn. (Poaceae) and Its Systematic Implications穇属颖果微形态及其系统学意义