臺灣新歸化酢漿草科植物：立性酢漿草

Oxalis barrelieri L. (Oxalidaceae)—A Newly Naturalized Plant in Taiwan

立性酢漿草（Oxalis barrelieri L.）原產於西印度群島與南美洲北部。近年來發現此外來種已歸化於高雄市六龜區十八羅漢山地區的公路旁。本種具木質化莖可與臺灣其他酢漿草屬植物區分。本文提供外部形態特徵、生育環境、分布和伴生植物。另提供花粉顯微形態為圓球形，3溝花粉粒，外壁為穿孔紋飾。

Oxalis barrelieri L. is native to West Indies and northern South America. Recently, we found that this exotic species has naturalized in the Shihbaluohanshan area of Liouguei District, Kaohsiung City, in southern Taiwan. This species can be distinguished from the other Oxalis spp. in Taiwan by its lignified stem. In this paper, we describe its external morphology, habitat, distribution and companion plant. Additionally, we also report its pollen as a circular, three-colpate pollen grain with perforate tectum.