Many species have been introduced beyond their native ranges and many have become global weeds. Human mediated dispersal has removed the geographic isolation of these species, reversing millions of years of independent evolution. Examples are the Oxalis species in section Corniculatae where several species have become invasive. Here we characterize and formally describe a hybrid between O. dillenii and O. corniculata, which occurs spontaneously in Belgium and Japan. Oxalis corniculata is probably native to Japan, but both species are alien to Belgium and O. dillenii is native to North America. We formally name this hybrid as Oxalis × vanaelstii. Although this hybrid is sterile, it is nevertheless vigorous and perennial. Both parent species grow as weeds in gardens; therefore, it is likely to be more common than currently appreciated in countries where these species co-occur.

中文翻译：

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酢浆草和 O. dillenii 在非本地范围内的杂交


许多物种已被引入到其原生范围之外，许多已成为全球杂草。人类介导的扩散消除了这些物种的地理隔离，逆转了数百万年的独立进化。例如，山茱萸科中的酢浆草属物种，其中一些物种已成为入侵物种。在这里，我们描述并正式描述了 O. dillenii 和 O. corniculata 之间的杂交种，这种杂交种在比利时和日本自发出现。酢浆草可能原产于日本，但这两个物种对比利时来说都是外来物种，而 O. dillenii 则原产于北美。我们正式将这种杂交种命名为 Oxalis × vanaelstii。虽然这种杂交种是不育的，但它仍然是旺盛的和多年生的。两种亲本都以花园杂草的形式生长。因此，在这些物种共存的国家中，这种现象可能比目前认为的更为常见。