聚类群Ⅱ的样点都是农田隔离带如田埂以及农田中的沟壑，以波斯婆婆纳、碎米莎草、野塘蒿和铁苋菜为优势种；
Group ⅱ, consisting of the samples located on ridges and furrows in the fields , was dominated with weed species , like Veronica persica , Conyza bonariensis and Acalypha australis .
碎米莎草