Click here for a link to the online Atlas of the British and Irish Flora with details of the plant ecology, distribution, photos and habitats: https://www.brc.ac.uk/plantatlas/index.php?q=plant/leucanthemum-vulgare
Click here for a link to the biological flora; a summary of all that is known about the ecological requirements of the plant, published in the Journal of Ecology: http://www.jstor.org/stable/2258252