Flowers have various regulatory mechanisms to attract insects. One such helpful mechanism is the use of color guiding marks. Insects such as the bee or butterfly can see the ultraviolet marks which are contained on these flowers, acting as an attractive mechanism which is not visible towards the human eye. Many flowers contain a variety of shapes acting to aid with the landing of the visiting insect and also influence the insect to brush against anthers and stigmas (parts of the flower). One such example of a flower is the pohutukawa (Metrosideros excelsa) which acts to regulate color in a different way. The pohutukawa contains small petals also having bright large red clusters of stamens.
