Cambridge University Botanic Garden was the first botanic garden in the UK to grow this endangered tree species. It is distributed in at least 372 botanic gardens globally.

This tulip species is not threatened but is rare in cultivation, and under-distributed across the world's botanic gardens.

The study showed that restrictions on wild plant collecting around the world are hampering efforts by botanic garden teams to gather plant diversity on the scale needed to study and protect it.

News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of ...