Flower Size

The size of the flower of flower head. For single flowers this value is obvious, but for plants with compound flower heads it is a matter of the authors judgement whether the flower head is generally perceived as one flower head of as a mass of single flowers.

Insignificant flowers are those of no visual value. Small flowers are less than 1cm (half inch) across, Medium flowers are up to 5cm (2 inches), large are those up to 15cm (6 inches) and very large are those over 15cm (6 inches).