미기록 침입외래식물: 멕시코백령풀(꼭두서니과)
Richardia brasiliensis Gomes (Rubiaceae), a New Invasive Alien Plant in Korea
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초록
Richardia brasiliensis Gomes가 제주도 서귀포시 수산리의경작지에서 발견되었다. Richardia L.는 국내에서 백령풀속(Diodia L.) 식물과 꽃받침, 꽃잎, 열매의 형태가 유사하다. R. brasiliensis는 R. scabra와 유사하나 종자의 표면 형태에 의해뚜렷이 구분된다. R. brasiliensis 종자의 배축면은 돌기와 긴털로 덮여 있고, 향축면은 오목하게 들어가 중앙에 용골과 같은선이 있는 반면, R. scabra 종자의 배축면과 향축면에는 돌기가있지만, 털이 없으며, 향축면 중앙부에 좁은 홈이 있다. 본 연구에서는 미기록 식물인 R. brasiliensis의 자생지, 형태학적 기재, 분포도, 화상자료 및 검색표를 제시하였다.
Abstract
Richardia brasiliensis Gomes was found in agricultural land in Susan-ri, Seogwipo-si, Jeju-do. Richardia L. is closely related to Diodia L. in Korea, those are confirmed to features of calyx, collora and fruit. This species is similar to R. scabra L., but it differs morphologically from the letter in surface structure of mericarp. The mericarp of R. brasiliensis has line like kneel at the adaxial, whereas R. scabra has groove at the adaxial. R. brasiliensis is recorded for the first time in this study and a morphological description, distribution map, and photographs are presented.
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