![Chatham Islands sow thistle plant.](http://static.sciencelearn.org.nz/images/images/000/001/745/full/Chatham-Islands-sow-thistle20160824-15744-16abr9k.jpg?1674166738)
The Chatham Islands sow thistle presents a conservation dilemma – while it is endangered, it is also the only host plant for the endangered fungi Puccinia embergeriae, which kills it.
The Chatham Islands sow thistle presents a conservation dilemma – while it is endangered, it is also the only host plant for the endangered fungi Puccinia embergeriae, which kills it.