The goal of this study was to better understand the origin and development of flowers and inflorescences in the newly established subfamily Dialioideae, an unusual and morphologically variable clade of Fabaceae due to its varied levels of floral reduction. We present here the complete ontogenetic series for two species characterizing different levels of floral reduction: Apuleia leiocarpa, an andromonoecious species with trimerous flowers; and Martiodendron fluminense, a species lacking the inner whorl of stamens. We also performed a literature review and herbarium specimen survey of the inflorescence and floral morphology of the other 15 genera in Dialioideae. Among the exclusive traits of Apuleia found here are the absence of two sepals and petals from initiation, the simultaneous initiation of the sepals (never before documented for Dialioideae), the absence of carpel initiation in staminate flowers and the formation of the carpel in the staminal whorl of monoclinous flowers, with the presence of a nectariferous hypanthium in both flower types. In Martiodendron the two exclusive traits are the heteromorphic development of stamens of the outer whorl, with the abaxial one being the last to elongate, and the possible initiation of an inner staminal whorl, which stops developing immediately thereafter and is no longer visible at anthesis. Among the potential synapomorphies for the subfamily are the absence of bracteoles and a pair of bracts subtending a triad of flowers or inflorescence axes, the distichous anthotaxy of the thyrsoid inflorescences, the bidirectional initiation of the sepals and the simultaneous initiation of the stamens.

中文翻译：

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豆科豆科亚科的花序和花的发育：无毛and和马杜鹃的进化概述和完整的个体发育系列

这项研究的目的是更好地了解刚建立的亚科Dialioideae的花朵和花序的起源和发育，该科是Fabaceae的一个异常且形态可变的进化枝，由于其减少的花序水平不同。在这里，我们介绍了两种具有不同程度的减花水平的物种的完整的个体发育系列：Apuleia leiocarpa，一种具三花的雄性单性物种；和Martumodendron fluminense（缺乏雄蕊内螺纹的物种）。我们还进行了文献综述和标本室标本调查，证明了方舟亚科中其他15个属的花序和花的形态。apuleia的独家特征在此处发现的是：没有从开始的两个萼片和花瓣，萼片的同时开始（从未记录过Diavioideae），在发芽的花中没有心皮起始以及在单瓣花的耐力轮中形成了心皮，两种花型中都存在油桃花托。在Martiodendron这两个排他性状是外轮雄蕊的异形发育，其背面是最后一个伸长的轴，并且可能是内部耐力轮的开始，此后立即停止发育，在花期不再可见。在亚科的潜在亚同型中，不存在小les片和一对sub片，这些pair片对着三联花或花序轴，甲状腺状花序离异的正直性，萼片的双向萌生和雄蕊的同时萌生。