Matt O'Brien trained flowering plant (10)

I believe the answer is:

montbretia

I'm a little stuck... Click here to teach me more about this clue!

'flowering plant' is the definition.
'montbretia' can be an answer for 'plant' (montbretia is a plant genus). I'm not sure about the 'flowering' bit.

'matt o'brien trained' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'matt'+'obrien'='mattobrien'
'mattobrien' is an anagram of 'MONTBRETIA'.

Can you help me to learn more?

(Another definition for montbretia that I've seen is " destroyed plant".)

I've seen this clue in The Times.

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