Primula sieboldii E. Morren is a heterostylous clonal herb that is widely distributed in Japan but in danger of extinction in the wild. The existence of pollinators in each habitat is imperative for its long‐term survival, because seeds can be produced only by insect cross‐pollination between different flower morphs. In this study, we identified the pollinators of P. sieboldii in a wild habitat in Hiroshima as those insects that we observed to (a) put the proboscis into a corolla tube, (b) deposit pollen grains on the proboscis, and (c) have a proboscis of appropriate length and width. Effective pollinators were identified from their contribution to pollination. In 2015 and 2016, the flower visitations of 232 and 558 insects, respectively, were recorded and 85 and 13 insects were captured. Two Bombylius species, B. major L. and B. shibakawae Matsumura, accounted for 90% of flower‐visiting insects in both years. All 14 species that we captured were considered pollinators of P. sieboldii, because they had proboscises that were long enough to reach pollen and that had pollen grains deposited on them. The total visitation rate of “Bombyliidae” was the highest among all pollinator categories. The results of potential pollen transport per flower per hour, which was based on total pollen number and total visitation rate of each pollinator category, indicated that “Bombyliidae” species were the most effective pollinators of P. sieboldii in this habitat.

中文翻译：

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鉴定日本广岛野生生境中报春花报春花E.莫伦的有效传粉媒介

报春花西伯利亚E.莫伦是一种异质性无性系草本植物，在日本广泛分布，但有在野外灭绝的危险。每个生境中必须存在传粉媒介才能长期生存，因为只有通过不同花形之间的昆虫异花授粉才能产生种子。在这项研究中，我们确定了广岛野生栖息地中的sieboldii传粉者为我们观察到的昆虫（a）将长鼻放入花冠管中，（b）将花粉粒沉积在长鼻上，和（c）有一个适当的长度和宽度的鼻。从对传粉的贡献中确定了有效的传粉媒介。在2015年和2016年，分别记录了232和558种昆虫的花访，并捕获了85和13种昆虫。二在这两年中，B. major L.和B. shibakawae Matsumura等Bombylius物种均占访花昆虫的90％。我们捕获的所有14个物种均被认为是sieboldii的传粉者，因为它们的象鼻长到足以达到花粉的程度，并且长有花粉粒。在所有授粉媒介类别中，“ Bombyliidae”的总造访率最高。基于每个授粉媒介类别的总花粉数量和总造访率，每朵花每小时潜在的花粉运输结果表明，“ Bombyliidae”物种是该生境中最有效的P. sieboldii授粉媒介。