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First Record of the Mycoheterotrophic Orchid Aphyllorchis montana var. rotundatipetala (Orchidaceae) from Amami-Oshima Island, Ryukyu Islands, Japan

English (英語)

Acta Phytotaxonomica et Geobotanica

76(1)

73-76

日本植物分類学会

2025-02-28

2025-05-09

This is the first report of Aphyllorchis montana var. rotundatipetala, a peloric variant of A. montana from Amami-Oshima Island, Ryukyu Islands, southern Japan, previously reported only from Taiwan. It can be distinguished from A. montana var. montana by its sub-actinomorphic flowers, a labellum that is not divided into hypochile and epichile, and a reduced stigma. Additionally, A. montana var. rotundatipetala can be distinguished from A. simplex from Vietnam and southern China—another probable peloric, sub-actinomorphic form of A. montana—by its obtuse lip apex (vs. acute in A. simplex), a highly reduced rostellum (vs. the prominent erect ligulate rostellum in A. simplex), and inconspicuous apical staminodes on both sides of the column (vs. two large, curved staminodes in A. simplex).

taxonomy

学術雑誌論文

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