Xyridaceae are represented in New Caledonia only by the genus Xyris, the description of which was last revised in the 1960s, and three endemic species were recognized there at that time, X. pancheri, X. neocaledonica and X. guillauminii. However, no specimens of X. guillauminii were reported from P or L, although some type material was present. In addition, most material was unidentified at the species level in international herbaria (up to 45% for the NOU herbarium), showing that the family had not been studied in the framework of the Flore de la Nouvelle-Calédonie. In total, 129 herbarium specimens were examined for an ascendant hierarchical classification and a principal coordinates analysis based on 18 morphological characters regarded as diagnostic at the species level (including six used in the original revision). The analyses revealed three well-delimited groups that potentially correspond to species-level units. A sub-sampling of 21 specimens, representative of these three groups, was studied anatomically (leaf cross-sections) and by scanning electron microscopy (leaf surface and seeds) and provided ten additional characters. This additional dataset validated the taxonomy in three species-level units. The resulting entities were then compared with nomenclatural types, which showed that the first corresponded to X. neocaledonica, the second represents a well-delimited, undescribed species, and the third includes types of both X. pancheri and X. guillauminii, this last being in need of synonymization. The findings of the present study provide a basis for undertaking a taxonomic revision of Xyris in New Caledonia, including the description of the new species. All New Caledonian species have an axile placentation and a trilocular ovary, so they belong to Xyris section Pomatoxyris, which is no longer endemic to Australia.

中文翻译：

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解剖学方法支持的多变量形态计量分析，用于评估新喀里多尼亚的Xyris（Xyridaceae）物种定界

木霉科仅在新喀里多尼亚由木霉属（Xyris）代表，其描述于1960年代进行了最新修订，当时在那儿认识到三种特有物种，即潘氏X. pancheri，新鳞茎X. neocaledonica和圭亚木X. guillauminii。然而，尽管存在某种类型的材料，但没有报道来自P或L的X. guillauminii标本。此外，大多数材料在国际草本植物的物种级别上尚未查明（NOU植物标本室高达45％），这表明该家族尚未在弗洛勒·德拉·诺维尔·卡莱多妮的框架内进行过研究。。总共检查了129个植物标本室标本，以进行向上的分类和基于18种形态学特征的主坐标分析，这些形态学特征在种属水平上具有诊断意义（包括在原始版本中使用的6种）。分析揭示了三个分隔良好的组，它们可能对应于物种级单位。通过解剖学（叶横截面）和扫描电子显微镜（叶表面和种子）研究了代表这三组的21个标本的亚采样，并提供了十个附加特征。此附加数据集以三个物种级别的单位验证了分类法。然后将得到的实体与命名法类型进行比较，这表明第一个对应于X. neocaledonica，第二个代表界限分明的，未描述的物种，第三个代表X. pancheri和X. guillauminii的类型，最后一个需要同义。本研究的发现为在新喀里多尼亚对Xyris进行分类学修订提供了基础，包括对新物种的描述。所有新喀里多尼亚物种都具有轴突胎盘和三眼子房，因此它们属于Xyris断面Pomatoxyris，不再是澳大利亚特有的。