In the pantropical mimosoid legume genus Parkia, taxonomic classification has remained controversial in Africa due to clinal phenotypic variations. Three species (P. biglobosa, P. bicolor, and P. filicoidea) are currently recognized, ranging from West to East Africa, with partially overlapping ranges across different floristic regions. However, additional taxa (species or varieties) have been suggested by different authors. To assess species boundaries of African Parkia and phylogeographic patterns within species, we genotyped 889 individuals using 10 microsatellite markers and compared our results with existing morphological descriptions. Bayesian genetic clustering confirmed the species boundaries assessed from morphological traits and did not reveal introgression but identified genetic discontinuities within each species. Six moderately differentiated genetic clusters were recovered in P. biglobosa (pairwise F_ST: 0.05–0.19), while P. bicolor and P. filicoidea, each, displayed four well-differentiated clusters (F_ST: 0.18–0.41 and 0.11–0.34, respectively). Within each species, genetic clusters occurred in parapatry. Parkia biglobosa clusters were congruent with the longitudinal clinal variation in leaflets sizes but 26% of individuals presented admixed genotypes. Genetic clusters in P. bicolor and P. filicoidea followed environmental gradients as well as phytogeographic subdivisions. They were also largely congruent with morphological discontinuities described in previous taxonomic studies and < 10% individuals showed admixed genotypes. We conclude that only one species (P. biglobosa) should be considered in the Guineo-Sudanian savanna. However, P. bicolor and P. filicoidea might each represent a complex of (sub)species. Thus, the hypotheses of cryptic species within P. bicolor and P. filicoidea should be further investigated by testing reproductive barriers.

在泛热带含羞草类豆科植物Parkia中，由于临床表型变异，分类学分类在非洲仍然引起争议。目前已识别出三个物种（大叶假单胞菌，双色假单胞菌和丝状假单胞菌），范围从西非到东非，在不同的植物区系部分重叠。但是，不同的作者提出了其他分类单元（物种或变种）的建议。评估非洲Parkia的物种边界和物种内的种系模式，我们使用10个微卫星标记对889个个体进行了基因分型，并将我们的结果与现有的形态学描述进行了比较。贝叶斯遗传聚类证实了从形态特征评估的物种边界，没有揭示出渗入性，但是确定了每个物种内的遗传不连续性。在大叶红球藻中检出了六个中等分化的遗传簇（成对的F _ST：0.05–0.19），而双色P. filicoidea和P. filicoidea分别显示四个分化良好的簇（F _ST：0.18–0.41和0.11-0.34，分别）。在每个物种内，遗传簇发生在副种群中。大叶Parkia聚簇与小叶的纵向枝条变化一致，但26％的个体表现出混合基因型。P. bicolor和P. filicoidea中的遗传簇遵循环境梯度以及植物地理分区。它们也与先前的分类学研究中描述的形态学不连续性完全一致，并且<10％的个体显示出混合的基因型。我们得出结论，在几内亚-苏丹大草原中应只考虑一种（P. biglobosa）。但是，双色假单胞菌和丝状假单胞菌可能各自代表（亚）物种的复合体。因此，双色假丝酵母和丝状假丝酵母中隐性物种的假设 应通过测试生殖障碍进一步调查。