Here we report the rediscovery of four endemic gesneriads from the state of Mizoram, India, after a span of 86 to 90 years since their last collection. The four species belong to the genus Didymocarpus Wall. and they are: D. adenocarpus, D. lineicapsa, D. parryorum, and D. wengeri. We present revised morphological descriptions, photographs, and designate lectotypes for D. parryorum and D. wengeri. During our study we came across several discrepancies between morphological characters assigned to these four species in the protologue and morphological characters present (or absent) in the type specimens and in plants recollected by us. We list these discrepancies in a section titled 'amendments to protologue'. Based on the high endemicity and critical conservation status of all the four rediscovered species, we suggest that floristic studies along with large-scale biogeographic studies should be prioritized in the Indo-Burmese region.

中文翻译：

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重新发现了来自印度米佐拉姆邦的四种狭窄特有种迪地香科（Gesneriaceae），并对其物种描述和选型进行了修订。

在这里，我们报道了自印度米佐拉姆邦（Mizoram）上次采集以来已有86到90年的时间，重新发现了4种特有的葛菌。这四个物种属于Didymocarpus Wall属。它们是：紫果念珠菌，D. lineicapsa，D. parryorum和D. wengeri。我们提出修订的形态描述，照片，并指定D. parryorum和D. wengeri的选型。在我们的研究中，我们发现在原型中分配给这四个物种的形态特征与类型标本和我们收集到的植物中存在（或不存在）的形态特征之间存在一些差异。我们在标题为“原型的修订”的部分中列出了这些差异。基于所有四个重新发现物种的高流行性和临界保护状态，