Yellow rattle  (Rhianthus minor)

Hemi-parasitic: plant that obtains some nutrition from a host plant, but is able to survive independently as it possesses the pigment chlorophyll and a root system.
Subspecies: a population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.

1. National Biodiversity Network Species Dictionary (January 2004):
   http://www.nhm.ac.uk/nbn
   
2. Clapham, A.R., Tutin, T.G., and Moore, D.M. (1987) Flora of the British Isles- 3rd Edition . Cambridge University Press, Cambridge.
   
3. Preston, C.D., Pearman, D.A. and Dines, T.D. (2002) New Atlas of the British and Irish Flora. Oxford University Press, Oxford.
   
4. Mabey, R. (1996) Flora Britannica. Sinclair-Stevenson, London.
   
5. Plants for a Future (January 2004):
   http://www.scs.leeds.ac.uk/cgi-bin/pfaf/arr_html
   
6. Habitas.org (January 2004):
   http://www.habitas.org.uk/flora/species.asp?item=4135