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<p>This study represents a revision of <i>Hoya</i> (Apocynaceae, Asclepiadoideae) in China as well as an investigation into the morphological and molecular diversity of the genus in China. 58 plastid genome sequences, including seven newly sequenced samples and 51 downloaded from NCBI, we used to construct phylogenetic trees using both maximum likelihood and Bayesian inference. The results show that the positions of these species on the phylogenetic tree are well supported and consistent with previous studies. We also conducted detailed measurements of the morphological characteristics of six <i>Hoya</i> species and performed scanning electron microscopy on their floral structures. This paper provides detailed taxonomic treatments for the following six <i>Hoya</i> species: two new species, <i>Hoya daoi</i>, sp. nov. and <i>H. maguanensis</i>, sp. nov.; two new records in China, <i>H. obcordata</i> and <i>H. sapaensis</i>; one new synonym of <i>H. longicalyx</i>; and one illegitimate name of <i>H. edeni</i>. We provide detailed descriptions of their morphological characteristics, flowering periods, distribution, and habitats, along with specimen information and diagnostic features. This study expands the known diversity of <i>Hoya</i> in China to 55 taxon (53 species, 1 variety, and 1 subspecies), providing new evidence for classification and phylogenetic research in this genus.</p>

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Diversity and taxonomic revision of Hoya (Apocynaceae, Asclepiadoideae) in China based on morphological and molecular evidence

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Yang Liu,
  • Wang Xi,
  • Nie-Rong Lu,
  • Ji-Dong Ya,
  • Jing-Feng Zhang,
  • Lei Cai

摘要

This study represents a revision of Hoya (Apocynaceae, Asclepiadoideae) in China as well as an investigation into the morphological and molecular diversity of the genus in China. 58 plastid genome sequences, including seven newly sequenced samples and 51 downloaded from NCBI, we used to construct phylogenetic trees using both maximum likelihood and Bayesian inference. The results show that the positions of these species on the phylogenetic tree are well supported and consistent with previous studies. We also conducted detailed measurements of the morphological characteristics of six Hoya species and performed scanning electron microscopy on their floral structures. This paper provides detailed taxonomic treatments for the following six Hoya species: two new species, Hoya daoi, sp. nov. and H. maguanensis, sp. nov.; two new records in China, H. obcordata and H. sapaensis; one new synonym of H. longicalyx; and one illegitimate name of H. edeni. We provide detailed descriptions of their morphological characteristics, flowering periods, distribution, and habitats, along with specimen information and diagnostic features. This study expands the known diversity of Hoya in China to 55 taxon (53 species, 1 variety, and 1 subspecies), providing new evidence for classification and phylogenetic research in this genus.