Bonus flowers ...

... Bonus flowers are the ones that pop up when you don't expect them too or that you forgot you planted or grow on plants you forgot flowered.
For example ....
Cornflowers, I'm pretty sure I sprinkled some seeds for cornflowers several years ago, they just keep popping up. They are the same colour as Small's eyes.Lobelia - I don't remember ever planting Lobelia in the front garden, must have though, because they too just keep popping up.Chive flowers - you forget that herbs flower too. Although, looking at the little bud nubbins I do recall some trendy-bastard chef or two decorating food with them - I'm not big on food decoration.