Absence of hybridisation between <i>Fuscospora</i> species at a site in Arthur's Pass National Park, New Zealand

We analysed simple sequence repeat markers for a selection of red beech (<i>Fuscospora fusca</i>) and mountain beech (<i>Fuscospora cliffortioides</i>) trees growing together and for seeds collected from them. Our analysis detected neither hybrid trees nor hybrid seeds within our sample. We suggest pre-zygotic reproductive isolating mechanisms such as differences in flowering time may be important in maintaining boundaries between <i>Fuscospora</i> species despite extensive sympatry.