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New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan
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Abstract
Two newly identified species ofCallicarpa(Lamiaceae),C. boninensisandC. hahajimensis, along with a new natural hybrid,C. ×chibusensisare described, all of which were identified on Hahajima Island, Ogasawara Islands, Japan. A comprehensive key toCallicarpaspecies in the Ogasawara Islands is also provided.Callicarpa boninensis, morphologically most similar toC. subpubescens, is distinguished by persistent stellate hairs on mature leaves and elongated petioles.Callicarpa hahajimensis, resemblingC. parvifoliain the Chichijima Islands, differs in its reduced stellate hair density on both leaf surfaces and thinner leaves.Callicarpa×chibusensis, considered a natural hybrid betweenC. subpubescensandC. boninensis, is characterized by intermediate stellate hair densities—higher than inC. subpubescensbut lower than inC. boninensis—on both leaf surfaces, smaller leaves than those ofC. subpubescens, and a distinct flowering phenology relative to that ofC. boninensis.
Title: New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan
Description:
Abstract
Two newly identified species ofCallicarpa(Lamiaceae),C.
boninensisandC.
hahajimensis, along with a new natural hybrid,C.
×chibusensisare described, all of which were identified on Hahajima Island, Ogasawara Islands, Japan.
A comprehensive key toCallicarpaspecies in the Ogasawara Islands is also provided.
Callicarpa boninensis, morphologically most similar toC.
subpubescens, is distinguished by persistent stellate hairs on mature leaves and elongated petioles.
Callicarpa hahajimensis, resemblingC.
parvifoliain the Chichijima Islands, differs in its reduced stellate hair density on both leaf surfaces and thinner leaves.
Callicarpa×chibusensis, considered a natural hybrid betweenC.
subpubescensandC.
boninensis, is characterized by intermediate stellate hair densities—higher than inC.
subpubescensbut lower than inC.
boninensis—on both leaf surfaces, smaller leaves than those ofC.
subpubescens, and a distinct flowering phenology relative to that ofC.
boninensis.
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