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Notes on Allium section Rhizirideum (Amaryllidaceae) in South Korea and northeastern China: with a new species from Ulleungdo Island
PhytoKeys ( IF 1.3 ) Pub Date : 2021-04-16 , DOI: 10.3897/phytokeys.176.63378 Ju Eun Jang , Jong-Soo Park , Ji-Young Jung , Dong-Kap Kim , Sungyu Yang , Hyeok Jae Choi
PhytoKeys ( IF 1.3 ) Pub Date : 2021-04-16 , DOI: 10.3897/phytokeys.176.63378 Ju Eun Jang , Jong-Soo Park , Ji-Young Jung , Dong-Kap Kim , Sungyu Yang , Hyeok Jae Choi
Allium section Rhizirideum is reviewed for South Korea and neighboring northeastern China based on critical observation of wild populations and herbarium materials. Species delimitations are re-evaluated on the basis of morphological and somatic chromosome numbers, resulting in the recognition of five species. Allium dumebuchum from Ulleungdo Island, South Korea, is described as a new species. This species is most similar to A. senescens due to its habits, but is clearly distinguished particularly by its rhomboid scapes in cross-secion, light purple perianth color, entire and narrowly triangular inner filaments, and flowering season from late September. One previously recognized species is placed into synonymy: A. pseudosenescens (under A. senescens). Photographs and a key to species of Allium section Rhizirideum in South Korea and northeastern China are provided in addition to information on nomenclatural types, synonymies, chromosome numbers, distribution, and specimens examined.
更新日期：2021-04-16
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