Ongoing taxonomic studies on Manihot in Brazil based on field collections and herbarium consultations led us to describe a new species and to make other taxonomic and nomenclatural changes in the genus. Manihot minimiflora is described and illustrated as a new species from Tocantins state in northern Brazil. Along with M. sagittatopartita and M. acuminatissima, it has the smallest flowers in the genus. However, M. minimiflora can be easily differentiated from its closest relatives by its shrubby habit, androecium with eight stamens, 8-lobed staminate disc, differently shaped bracts and bracteoles of the staminate flowers, calyces of both sexes lacking any purplish or reddish pigmentation, and shorter seeds. A conservation assessment and data on the phenology, distribution, and morphology of the new species are provided. We also provide distribution maps, morphological characterization, and conservation status assessments for M. acuminatissima, M. longipetiolata, M. sagittatopartita, M. salicifolia, M. stricta, and M. weddelliana, as well as discuss their morphological relationships. Lectotypifications are provided for those six species and for two synonyms, M. riedeliana and M. mattogrossensis.

中文翻译：

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巴西野生木薯（木薯、大戟科）的新奇

基于实地收集和植物标本馆咨询，巴西马尼霍特正在进行的分类学研究使我们描述了一个新物种，并对该属进行了其他分类学和命名学的改变。Manihot minimiflora 被描述和说明为来自巴西北部托坎廷斯州的一个新物种。与 M. sagittatopartita 和 M. acuminatissima 一起，它拥有该属中最小的花。然而，M. minimiflora 可以很容易地通过其灌木习性与其近亲区分开来，雄蕊花有 8 个雄蕊，8 裂的雄蕊盘，雄花的不同形状的苞片和小苞片，两性的花萼都没有任何紫色或红色色素沉着，和较短的种子。提供了关于新物种的物候、分布和形态的保护评估和数据。我们还提供 M. acuminatissima、M. longipetiolata、M. sagittatopartita、M. salicifolia、M. stricta 和 M. weddelliana 的分布图、形态特征和保护状态评估，并讨论它们的形态关系。为这六个物种和两个同义词 M. riedeliana 和 M. mattogrossensis 提供了分类分类。