1. Extrafloral nectaries are often found on the leaves or stems of some plants.
一些植物的叶子或茎上常有额外的花序蜜腺。
2. The presence of extrafloral nectaries on certain plants can attract predatory insects for protection against herbivores.
某些植物存在额外的花序蜜腺可以吸引捕食性昆虫,以保护自己免受食草动物的侵害。