In order to study the relationships between mistletoes and their host species, comprehensive collections of both mistletoes and hosts are needed. The effect of sampling effort on the estimation of mistletoe host range was demonstrated in a comparison of an inventory of host mistletoe interactions published by Downey in 1998 and a 2019 inventory presented here, which is based on data from collections in the Australian Virtual Herbarium and information in the literature. New hosts were recorded for 93% of the 90 Australian mistletoes. There were 338 previously known hosts recorded to be parasitised by additional mistletoe species, and 317 new host species that were not previously known as mistletoe hosts (25 being alien species). These were from 78 new host genera and 13 new host families. The total number of host species was 1186 within 327 genera from 92 host families. A total of 63% of all Australian mistletoes parasitise species of either Eucalyptus or Acacia or both these genera. The large rise in host species recorded in less than two decades between inventories suggests that current knowledge of hosts is still incomplete, such that further new hosts will be discovered in future. Some mistletoe species show a strong preference to one host family or genus but due to insufficient collecting it is premature to conclude that any of the three species known from a single host are host specific.

中文翻译：

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澳大利亚槲寄生的寄主物种（Loranthaceae 和 Viscaceae）

为了研究槲寄生与其寄主物种之间的关系，需要对槲寄生和寄主进行全面收集。抽样工作对槲寄生寄主范围估计的影响在唐尼 1998 年发布的寄主槲寄生相互作用清单与此处提供的 2019 年清单的比较中得到了证明，该清单基于澳大利亚虚拟植物标本馆收集的数据和信息在文献中。在 90 种澳大利亚槲寄生中，93% 的新宿主被记录下来。有 338 种以前已知的宿主被记录被其他槲寄生物种寄生，317 种新宿主物种以前不被称为槲寄生宿主（25 种是外来物种）。这些来自 78 个新的寄主属和 13 个新的寄主科。寄主种总数为92个寄主科327属1186种。总共有 63% 的澳大利亚槲寄生寄生于桉树属或金合欢属或这两种属。在两次清查之间记录的寄主物种数量大幅增加表明，目前对寄主的了解仍然不完整，因此将来会发现更多的新寄主。一些槲寄生物种表现出对一个寄主家族或属的强烈偏好，但由于收集不足，因此断定从单个寄主已知的三个物种中的任何一个是寄主特异性的还为时过早。在两次清查之间记录的寄主物种数量大幅增加表明，目前对寄主的了解仍然不完整，因此将来会发现更多的新寄主。一些槲寄生物种表现出对一个寄主家族或属的强烈偏好，但由于收集不足，因此断定从单个寄主已知的三个物种中的任何一个是寄主特异性的还为时过早。在两次清查之间记录的寄主物种数量大幅增加表明，目前对寄主的了解仍然不完整，因此将来会发现更多的新寄主。一些槲寄生物种表现出对一个寄主家族或属的强烈偏好，但由于收集不足，因此断定从单个寄主已知的三个物种中的任何一个是寄主特异性的还为时过早。