Flowers share purposes (7)
I believe the answer is:
lotuses
'flowers' is the definition.
(lotus is a type of flower)
'share purposes' is the wordplay.
'share' becomes 'lot' (I've seen this in another clue).
'purposes' becomes 'uses' ('use' can be a synonym of 'purpose').
'lot'+'uses'='LOTUSES'
(Other definitions for lotuses that I've seen before include "bloomers" , "flowers" , "sports cars" , "Water lilies" , "Plants" .)