Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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Taxonomic studies of the tribe Potentilleae (Rosaceae) in Korea

한국산 양지꽃족(장미과)의 분류학적 연구

  • Received : 2019.01.08
  • Accepted : 2019.03.28
  • Published : 2019.03.31
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Abstract

We conducted taxonomical investigations based on morphological characteristics, fruit morphology, and literature research on the tribe Potentilleae (Rosaceae) in Korea covering seven genera and 24 species. The style position on the ovary and the shape of style were useful characteristics for the classification of subtribal and generic levels in the tribe Potentilleae. The subtribe Fragariinae is characterized by subbasal or lateral style on the ovary and anthers with one theca. The subtribe Potentillinae has a subterminal style on the ovary, except for Argentina, which presents a subterminal and lateral style and anthers with two thecae. These results support the recent taxonomic recognition that i) the tribe Potentilleae consists of two subtribes, and ii) genera such as Dasiphora, Comarum, and Sibbaldianthe sometimes included in Potentilla s.l. are treated as independent genus. In the subtribe Potentillinae, Argentina, which has been treated as Potentilla, is supported as a distinct genus according to the characteristics of the subterminal and lateral style position and the ventral stipular auricles. In Fragaria, F. nipponica subsp. chejuensis, which has generally small leaves and a limited distribution only on Hallasan Mt., is supported by treatment as an endemic species. Duchesnea chrysantha is distinguished from D. indica by the characteristics of light green or yellowish green leaves, thin and somewhat membranous leaflets, and broad ovate or obovate leaflets. Each complex of P. dickinsii and P. chinensis remains unresolved with regard to controversy over the taxonomic circumscription due to their external morphological variations. Additional taxonomical research and molecular population studies are required for a more in-depth understanding of the tribe Potentilleae in Korea.

한국산 양지꽃족(tribe Potentilleae) 식물 7속 24종에 대하여 외부형태 형질과 과실 미세구조 관찰 및 문헌 조사를 통한 분류학적 연구를 수행하였다. 화주가 암술에 위치하는 특징과 화주의 모양은 양지꽃족의 아족 및 속간 분류에 유용한 형질이었다. 딸기아족(subtribe Fragariinae)은 화주가 아기저생 또는 측생하였으며 수술에는 1개의 화분낭을 갖는 반면에, 양지꽃아족은 화주가 대부분 자방에 아정생하며, 드물게 측생하고, 수술에 2개의 화분낭을 갖는 특징으로 구분되는 것으로 밝혀졌다. 딸기아족에는 물싸리속, 물싸리풀속, 검은낭아초속, 딸기속이 포함되며, 각 속은 양지꽃속과는 구분되는 독립된 속으로의 처리를 지지한다. 양지꽃속으로 처리되어 왔던 눈양지꽃은 양지꽃아족에서 유일하게 화주가 측생/아정생하는 특징과 탁엽이 엽병의 앞면에 부착하는 특징으로 독립된 눈양지꽃속으로 처리됨을 지지한다. 종 수준에서의 연구 결과 흰땃딸기(딸기속)는 식물체가 잎 포함하여 전반적으로 작고, 한라산에서만 제한 분포하는 특징으로 특산종으로 처리가 타당하다고 판단된다. 산뱀딸기(뱀딸기속)는 뱀딸기에 비하여 잎이 연한 녹색 또는 황녹색, 소엽이 얇고 다소 막질이며, 넓은 난형 또는 도란형의 소엽 등을 갖는 특징으로 뱀딸기와 잘 구분된다. 다양한 외부형태학적 변이를 보여 분류군의 한계에 대한 논란이 있어 왔던 양지꽃속의 돌양지꽃 복합체와 딱지꽃 복합체에 대하여 추가적인 분류학적 연구와 개체군 수준에서의 분자분류학적 연구가 필요하다.

Keywords

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