1. [corresponding author] St Andrews Botanic Garden, Canongate, St Andrews, KY16 8RT (e-mail: ).
2. Department of Life Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD
3. Museums Sheffield, Weston Park, Western Bank, Sheffield, S10 2TP
4. Kirkstead Abbey Grange, Thorpe Hesley, Rotherham, S61 2UZ