As the result of surveying the relevant type specimens, together with macro‐ and micro‐morphological studies, chromosome counting and ITS sequencing, Astragalus trifoliastrum was found to be a species independent of A. laguriformis (with which it has peviously been synonymized). In contrast, A. wanensis , assumed to be a synonym of A. trifoliastrum , indeed appears to be identical with A. trifoliastrum . The diploid chromosome number of 2n = 16 is reported for the first time for A. trifoliastrum .
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Bagheri et al. (2015) studied this question.
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