Anthesis

For the concept, see Antithesis.

Not to be confused with Enthesis.

Anthesis is the period during which a flower is fully open and functional. It may also refer to the onset of that period.^[1]

The sequential anthesis of the individual flowers in this Banksia menziesii inflorescence has begun.

The onset of anthesis is spectacular in some species. In Banksia species, for example, anthesis involves the extension of the style far beyond the upper perianth parts. Anthesis of flowers is sequential within an inflorescence, so when the style and perianth are different colours, the result is a striking colour change that gradually sweeps along the inflorescence.^[2]

Flowers with diurnal anthesis generally are brightly colored in order to attract diurnal insects, such as butterflies. Flowers with nocturnal anthesis generally are white or less colorful, and as such, they contrast more strongly with the night. These flowers typically attract nocturnal insects including many moth species.

References

1. University of Wisconsin Extension (2009-07-30), Anthesis (Flowering) in Wheat, archived from the original on 2021-12-21, retrieved 2019-06-02
2. Bhattacharya, Kashinath; Datta, Badal Kumar (January 1992). "Anthesis and pollen release : anthesis and pollen release of some plants of west bengal, india". Grana. 31 (1): 67–71. doi:10.1080/00173139209427828. ISSN 0017-3134.