Research at the UK's Centre for Ecology and Hydrology has shown that encouraging yellow rattle to grow in hay meadows greatly increases biodiversity by restricting grass growth and thereby allowing other species to thrive.
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Many species are associated with V. orobus in Great Britain, including Alchemilla glabra, Carex pallescens, Genista anglica, Pseudorchis albida, Rhinanthus minor, Stachys officinalis and Viola lutea.