@book {7,
	title = {The vegetative key to the British Flora},
	year = {2009},
	publisher = {Botanical Society of the British Isles},
	organization = {Botanical Society of the British Isles},
	address = {Southampton},
	issn = {13: 978-0-9560144-0-5},
	author = {John Poland and Eric Clement}
}
