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<p>Two new species of <i>Amitostigma</i> (Orchidaceae) are described and illustrated based on morphological characters and molecular systematics. <i>Amitostigma zhipingianum</i> is similar to <i>A.</i> <i>nanum,</i> but is distinguished from it by its linear leaf at the middle of the stem, lip elliptic, mid-lobe bilobed, the entrance of the spur hairy. <i>Amitostigma motuoense</i> is morphologically similar to <i>A.</i> <i>nanum</i> and <i>A.</i> <i>monanthum</i>, but differs from them by its linear leaf, elliptic lip, mid-lobe of lip bilobed at apex, and shape of spur. A new generic delimitation of the <i>Amitostigma</i> alliance is proposed.</p>

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Two new species of Amitostigma (Orchidaceae: Orchideae) from Xizang, China, based on molecular and morphological evidence

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Haixia Wen,
  • Dongliang Lin,
  • Chao Ye,
  • Hanchen Wang,
  • Xiqiang Song,
  • Xiaohua Jin

摘要

Two new species of Amitostigma (Orchidaceae) are described and illustrated based on morphological characters and molecular systematics. Amitostigma zhipingianum is similar to A. nanum, but is distinguished from it by its linear leaf at the middle of the stem, lip elliptic, mid-lobe bilobed, the entrance of the spur hairy. Amitostigma motuoense is morphologically similar to A. nanum and A. monanthum, but differs from them by its linear leaf, elliptic lip, mid-lobe of lip bilobed at apex, and shape of spur. A new generic delimitation of the Amitostigma alliance is proposed.