Biosystematic studies on the genus Heloniopsis (Melanthiaceae) II.: Two new species from Korea based on morphological and molecular evidence
Biosystematic studies on the genus Heloniopsis (Melanthiaceae) II.: Two new species from Korea based on morphological and molecular evidence
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作者：
Fuse, S;Lee, NS;Tamura, MN
描述了韩国特有的两个新种 Heloniopsis（Melanthiaceae）：H. tubeiflora 和 H. koreana。 Heloniopsis tubeiflora 与 H. orientalis 相似，但前者在开花时有花，倾斜向下排列（下垂），并具有基部管状花被，顶部通常下弯（很少直），蓝紫色到紫色（但成熟时在顶端附近通常呈白色）。 Heloniopsis koreana 与 H. orientalis 的不同之处在于，其叶子通常为匙形，很少倒披针形，边缘有微小的波状起伏，花被片基部稍囊状至非囊状。通过植物标本的比较，我们得出结论，韩国的所有植物都包含这两种新的特有物种。根据 trnK 5' 内含子和 matK DNA 序列数据联合分析得出的分子系统发育，Heloniopsis 包括三个谱系：（1）日本和台湾的 5 个种； (2) 朝鲜人； (3) H. tubeiflora。
Two new species of Heloniopsis (Melanthiaceae) endemic to Korea are described: H. tubiflora and H. koreana. Heloniopsis tubiflora is similar to H. orientalis, but the former has flowers at anthesis arranged obliquely downward (to pendulous) and has a basally tubular perianth, usually recurved apically (rarely straight) and bluish-purple to purple (but usually whitish near the apex when mature). Heloniopsis koreana differs from H. orientalis in having leaves that are usually spathulate, rarely oblanceolate, with minutely undulate margin, and with tepals slightly saccate to non-saccate at the base. Through comparison of herbarium specimens, we conclude that all plants in Korea comprise these two new endemic species. Based on the molecular phylogeny resulting from combined analyses of trnK 5' intron and matK DNA sequence data, Heloniopsis comprises three lineages: (1) five species in Japan and Taiwan; (2) H. koreana; and (3) H. tubiflora.