403 HIERACIUM RADYRENSE Conservation of Britain’s biodiversity: Hieracium radyrense

Hieracium radyrense (Pugsley) P. D. Sell & C. West (Asteraceae), Radyr Hawkweed is a very rare endemic species restricted to Radyr, Glamorgan (v.c. 41), Wales. It was first found in 1907, and was described as a variety in 1948 and as a species in 1955, and belongs to Hieracium Section Vulgata. It has been seen only a few times since it was first found. Surveys between 1998 and 2004 indicate that only one population with 20– 25 plants survives, and it is extinct in two other sites. Neither the species nor the site has any legal protection, and it is under significant threat of extinction. Seed has been deposited in the Millennium Seed Bank, and it is being grown in cultivation