Weed: A wild plant growing where it is not wanted and in competition with cultivated plants.
A good garden may have some weeds. – Thomas Fuller
Weeds are flowers too, once you get to know them. – (Wrongly attributed to) A. A. Milne
What would the world be, once bereft
Of wet and wildness? Let them be left,
O let them be left, wildness and wet;
Long live the weeds and the wilderness yet.
– Gerard Manley Hopkins, “Inversnaid”