Suetsugu Kenji, Shimaoka Chie, Fukunaga Hirokazu, Sawa Shinichiro
Department of Biology, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan.
PhytoKeys. 2018 Jan 10(92):17-35. doi: 10.3897/phytokeys.92.21657. eCollection 2018.
To elucidate the taxonomy of the Honda, 1931 species complex, the present study investigated the detailed morphology of three varieties in Japan. While L. nigricans var. patipetala Y.Sawa, 1980 and L. nigricans var. yakusimensis T.Hashim., 1990 have often been treated as synonyms of L. nigricans var. nigricans, the present study demonstrates that the three varieties are morphologically distinct. More specifically, L. nigricans var. nigricans only produces complete cleistogamous flowers and is distinct from the plants currently called "", which are identical to the chasmogamous variety var. patipetala. The other chasmogamous variety L. nigricans var. yakusimensis can be easily distinguished from L. nigricans var. patipetala by its more spatulate tepals and higher cucullate lip. Therefore, the present study provides emended description of the three varieties based on type specimens and specimens collected from type localities. In addition, the isotype specimen of L. nigricans var. patipetala is designated as the lectotype because the holotype has been lost.
为阐明1931年本田物种复合体的分类，本研究调查了日本三个变种的详细形态。虽然黑花鸢尾狭瓣变种（Y.Sawa，1980）和黑花鸢尾屋久岛变种（T.Hashim.，1990）常被视为黑花鸢尾原变种的同义词，但本研究表明这三个变种在形态上是有区别的。更具体地说，黑花鸢尾原变种只产生完全闭花受精的花，与目前被称为“”的植物不同，后者与开花受精的狭瓣变种相同。另一个开花受精的变种黑花鸢尾屋久岛变种可以通过其更匙形的花被片和更高的兜状唇瓣与黑花鸢尾狭瓣变种轻易区分。因此，本研究基于模式标本和从模式产地采集的标本对这三个变种进行了修订描述。此外，由于黑花鸢尾狭瓣变种的全模式标本已丢失，因此指定其等模式标本为选定模式标本。
