Plant 150 too many (6)

I believe the answer is:

clover

'plant' is the definition.
(clover is a kind of plant)

'150 too many' is the wordplay.
'150' becomes 'CL' (Roman numerals).
'too many' becomes 'over' (I've seen this in other clues).
'cl'+'over'='CLOVER'

(Other definitions for clover that I've seen before include "Meadow plant" , "Trifolium" , "Pasture plant" , "Three-leaved wild plant" , "Wild three-leafed plant" .)

I've seen this clue in the Evening Standard.

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