Notes on Allium section Rhizirideum (Amaryllidaceae) in South Korea and northeastern China: with a new species from Ulleungdo Island

• Published in: PhytoKeys Vol. 176; no. 172; pp. 1 - 19
• Main Authors: Jang, Ju Eun, Park, Jong-Soo, Jung, Ji-Young, Kim, Dong-Kap, Yang, Sungyu, Choi, Hyeok Jae
• Format: Journal Article
• Language: English
• Published: Bulgaria Pensoft Publishers 16.04.2021
• Subjects: Amaryllidaceae; Asia; Cenozoic; Taxonomy; South Korea; China; new species; synonym; DNA barcode; morphology; Chromosome number; taxonomy; distribution
• ISSN: 1314-2011; 1314-2011; 1314-2003
• DOI: 10.3897/phytokeys.176.63378

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. from Ulleungdo Island, South Korea, is described as a new species. This species is most similar to 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: (under ). 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.