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Issue: Vol. 737 No. 2: 9 Jan. 2026
Type: Article
Published: 2026-01-09
DOI: 10.11646/phytotaxa.737.2.2
Page range: 68-76
Abstract views: 134
PDF downloaded: 4

Abrodictyum polynesicum (Hymenophyllaceae, Polypodiidae), a new fern species for the French Polynesia

Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, MNHN, CNRS, EPHE, Université des Antilles, CP 48, 57 rue Cuvier, 75005 Paris, France
Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, MNHN, CNRS, EPHE, Université des Antilles, CP 48, 57 rue Cuvier, 75005 Paris, France
Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, MNHN, CNRS, EPHE, Université des Antilles, CP 48, 57 rue Cuvier, 75005 Paris, France
Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, 305-0005, Japan
Oceania Taxonomy ferns Polynesia Pteridophytes

Abstract

The filmy fern Abrodictyum asae-grayi (Hymenophyllaceae) is thought to be distributed from New Guinea to French Polynesia. However, specimens from the Marquesas Islands and some populations from the Society Islands show clearly erect rhizomes, while the species A. asae-grayi is described as having creeping rhizomes. In-depth examination of the herbarium specimens and phylogenetic analysis demonstrate that the specimens with creeping rhizomes and those with erect rhizomes define two distinct species. The new species, A. polynesicum, endemic to French Polynesia, is discussed and described here.

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How to Cite

Dubuisson, J.-Y., Zhao, Y.-N., Boucheron-Dubuisson, E. & Ebihara, A. (2026) Abrodictyum polynesicum (Hymenophyllaceae, Polypodiidae), a new fern species for the French Polynesia. Phytotaxa 737 (2): 68–76. https://doi.org/10.11646/phytotaxa.737.2.2