'Me: celendine...

.... like the other day'.
Head Gardener (looking confused): 'This is a clematis.'
Me: 'It's the same colour as the other day - blue.' 
HG: (puzzled) 'Celendines are yellow.'
Me: 'They were blue.' 
HG: 'The blue ones were anemones. I wasn't stood next to you and I thought you were identifying the yellow ones which would have been correct.' 
Me: 'Ah.'