Thecae horns are specialized anther extensions present in two tribes of Araceae: Cryptocoryneae and Schismatoglottideae. This structure is important in defining the generic boundaries and segregations within Schismatoglottideae. Eleven convergent lineages of thecae horns have evolved within Schismatoglottideae, contributing to the diverse stamen structures and thecae orientations. Here, we investigated the stamens of 22 taxa belonging to eight genera (Aridarum, Burttianthus, Hera, Heteroaridarum, Pursegloveia, Naiadia, Tawaia, and Toga) of Schismatoglottideae. We assessed the floral biology by focusing on the angle and movement of the thecae horns during the pistillate and staminate phases of anthesis. The angle of the thecae horns changed at the start of anthesis and, in several species, elevated further during staminate anthesis. Papillae cells, smooth or verrugated surface, are present on the thecae horns with the excavated connective often found to be smooth vs. non excavated connective, with verrugated surface. The presence of calcium oxalate packages decreases from pistillate phase to staminate phase of anthesis and is postulated to be a defense mechanism against predators.

Thecae horns 是存在于天南星科两个部落中的特殊花药延伸部分：Cryptocoryneae 和 Schismatoglottideae。这种结构对于定义裂舌亚科内的一般边界和分离很重要。在 Schismatoglottideae 内进化出了 11 个会聚的囊角谱系，促成了不同的雄蕊结构和囊方向。在这里，我们调查了属于 8 个属（Aridarum、Burttianthus、Hera、Heteroaridarum、Pursegloveia、Naiadia、Tawaia和Toga的 22 个分类群的雄蕊。) Schismatoglottideae。我们通过关注花期雌蕊期和雄蕊期囊角的角度和运动来评估花卉生物学。囊角的角度在开花开始时发生变化，并且在几个物种中，在雄蕊开花期间进一步升高。乳头细胞，光滑或有波纹的表面，存在于囊角上，具有开挖的结缔组织通常是光滑的，而非开挖的结缔组织，具有波纹表面。草酸钙包的存在从花期雌蕊期到雄蕊期减少，并被假定为抵御捕食者的防御机制。