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New flora of the British Isles (2019)
Alchemilla - lady's-mantles of Britain and Ireland. (2022)
Eyebrights (Euphrasia) of the UK and Ireland. (2018)
Broomrapes of Britain and Ireland.: a field giuode to the holoparasitic Orobranchaceae. (2021)
Gentians of Britain and Ireland. (2019)
Field flora of the British Isles (1999)
New flora of the British Isles (1991)
The concise flowers of Europe (1972)
The vegetative key to the british flora: A new approach to plant identification (2009)