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Issue: Vol. 774 No. 2: 15 Sept. 2026
Type: Article
Published: 2026-09-15
DOI: 10.11646/phytotaxa.774.2.2
Page range: 118-132
Abstract views: 33
PDF downloaded: 4

Additions to the Pteridophyte flora of the Batanes Islands, a biogeographic link between the Philippines and Taiwan

Biodiversity Program; Taiwan International Graduate Program; Academia Sinica; Taipei 11529; Taiwan; Department of Life Science; National Taiwan Normal University; Taipei 11677; Taiwan; Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Biodiversity Program; Taiwan International Graduate Program; Academia Sinica; Taipei 11529; Taiwan; Department of Life Science; National Taiwan Normal University; Taipei 11677; Taiwan; Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Philippine National Herbarium; Botany and National Herbarium Division; National Museum of Natural History; National Museum of the Philippines; Manila 1000; Philippines
Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Biodiversity Research Center; Academia Sinica; Taipei 115; Taiwan
Pteridophytes Floristic new records lectotypification

Abstract

Situated between Luzon and Taiwan, the Batanes archipelago forms an important biogeographic link between the floras of the Philippines and Taiwan. Ferns and lycophytes, many of which are capable of effective long-distance dispersal, are well represented on oceanic islands, and nearly 100 species have previously been recorded from Batanes. Based on a two-week botanical expedition to Batan and Itbayat Islands in 2026, we report six additions to the pteridophyte flora of the archipelago: Adiantum capillus-veneris subsp. lanyuanum, Cephalomanes atrovirens, Chingia paucipaleata, Crepidomanes kurzii, Diplazium polypodioides, and Psilotum nudum. We also clarify a previous misidentification of Tectaria decurrens as T. sulitii and designate a lectotype for T. decurrens. In addition, we synonymize Oreogrammitis moorei under O. fenicis based on both morphological and genetic evidence. Field photographs, close-up images, and taxonomic notes are provided, and the biogeographic significance of these findings is discussed.

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How to Cite

Chen, C.-W., Bucay, M.A.C., Tandang, D.N., Hsieh, C.-L., Tsai, L.-W., Chen, H.-W. & Chung, K.-F. (2026) Additions to the Pteridophyte flora of the Batanes Islands, a biogeographic link between the Philippines and Taiwan. Phytotaxa 774 (2): 118–132. https://doi.org/10.11646/phytotaxa.774.2.2