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Korean J. Pl. Taxon > Volume 51(3); 2021 > Article
Korean Journal of Plant Taxonomy 2021;51(3): 198-204.
doi: https://doi.org/10.11110/kjpt.2021.51.3.198
홍도고들빼기의 분류학적 실체
장영종 , 최병희
Taxonomic identity of Crepidiastrum ×nakaii recorded on Hongdo Island
Young-Jong JANG , Byoung-Hee CHOI
Department of Biological Sciences, Inha University, Incheon 22212, Korea
Correspondence :  Byoung-Hee CHOI ,Email: bhchoi@inha.ac.kr
Received: August 9, 2021  Revised: August 31, 2021   Accepted: September 11, 2021
The plant known as “Hong-do-go-deul-ppae-gi” on Hongdo Island, belonging to the genus Crepidiastrum, has been recorded as C. ×nakaii, a hybrid between C. denticulatum and C. platyphyllum. During a survey of the flora of Hongdo Island, we reexamined the taxonomic identity of “Hong-do-go-deul-ppae-gi”. The morphological traits, geographical distribution, and internal transcribed spacer (ITS) sequences of “Hong-do-go-deul-ppae-gi” were compared to related species within the genus. A morphological examination revealed that the plant was similar to C. lanceolatum in that it has subshrub stems with caudex stout, 8 inner involucrals bracts, and 10 to 12 florets. In contrast, similarities to C. denticulatum were observed in terms of radical leaves deciduous in the flowering period, cauline leaves membranous with acute serrations, and beaked achenes. Furthermore, C. denticulatum and C. lanceolatum grew on Hongdo Island and nearby areas, but C. platyphyllum was not distributed in these areas. The results of morphological and distributional investigations revealed that the Hongdo Island plant should be regarded as C. ×muratagenii, a hybrid between C. denticulatum and C. lanceolatum, not C. ×nakaii, which is a hybrid between C. denticulatum and C. platyphyllum. However, the resolution of the ITS sequences was insufficient such that we could not separate the examined species.
KeyWords: Crepidiastrum ×muratagenii, Crepidiastrum, geographical distribution, Hongdo Island, morphological traits
주요어: 홍도고들빼기, 홍도, 고들빼기속, 형태적 특징, 지리적 분포
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