复合种 meaning in English

aggregate species
complex species

The differences between members of this complex are small indeed .
这个复合种成员间的差异确实很小。
Where species form apomictic clones that are very difficult to distinguish from each other , they are termed aggregate species , e . g . bramble ( rubus fruticosus agg . )
从单性生殖系产生的物种极为相似，几乎无法分辨，这被称为复合种。
Based on the comparative analysis of style , stigma size , pod length and width , pod surface area , seed diameter and dry weight between amphidiploids and their putative diploid ancestors , we observed that some accessions of amphidiploids revealed intermediate state between the two putative parents , others resembled only one of the parents
摘要通过比较分析薹属多倍体复合种与其祖先二倍体基本种在花柱、柱头大小、角果长度、宽度、种子直径及种子干重变化上的异同，发现多倍体复合种在这些发育性状上表现出处于两个祖先二倍体亲本之间，或只偏向于其中一个祖先亲本。