ABSTRACT

Pyrrosia serpens is recorded here for the first time from the New Zealand Botanical Region, based on a single collection from Dayrell Island in the Kermadec Islands. This is a significant southern extension of range for the species, otherwise known in the Pacific from Fiji to Pitcairn and Henderson Islands. The identification of the Dayrell Island collection is based on evidence from both morphology (particularly soral and rhizome scale characters) and genetics. Morphological comparisons were made, in particular, with three related Australasian species. Phylogenetic analysis shows that the chloroplast DNA sequence of the Dayrell Island collection is very similar to that of P. serpens from the Cook Islands. However, previously reported sequences from samples of P. serpens from elsewhere are very different, reflecting a wider need for further taxonomic investigation of Pyrrosia subgenus Nipholobus. Pyrrosia serpens is one of ten fern species that, in New Zealand, are found only on the Kermadec Islands. In preparation for a revised treatment of Polypodiaceae for the electronic Flora of New Zealand, the taxonomic treatment of Pyrrosia is reviewed, a description of P. serpens from the Kermadec Islands provided, and its conservation status assessed.

摘要

根据来自克马德克群岛的代勒尔岛的一个藏品，首次从新西兰植物园记录了发炎的夏洛来子草（Pyrrosia serpens）。这是该物种范围的一个重要的南部扩展，否则从斐济到皮特凯恩群岛和亨德森群岛在太平洋地区也广为人知。Dayrell Island集合的识别基于形态学（尤其是根茎和根茎尺度特征）和遗传学的证据。尤其是对三种相关的澳大利亚物种进行了形态学比较。系统发育分析表明，Dayrell岛采集的叶绿体DNA序列是非常相似的P.巨蛇从库克群岛。然而，先前报道的来自锯齿假单胞菌样品的序列从其他地方有很大的不同，反映了进一步的分类学研究更广泛的需求石韦亚属Nipholobus。夏枯草（Pyrrosia serpens）是仅在Kermadec群岛上发现的十种蕨类植物之一。在准备修订针对新西兰电子植物区系的虎耳菌科治疗方法时，对吡咯菌属的分类学方法进行了审查，提供了对来自克马德克群岛的锯齿假单胞菌的描述，并评估了其保存状况。