" We in effect challenge the unwanted prodigy to produce forms that slip through our control systems. It does not take much to beat us. One seed in a thousand may germinate later than the last hoeing, pass through the sieve intended to exclude it, show a mysterious immunity to weedkillers. The following year there are five . . . "

― Richard Mabey , Weeds: How Vagabond Plants Gatecrashed Civilisation and Changed the Way We Think About Nature