0 the petals of a flower -- korolla
The corolla is the most conspicuous part in the flower because it is usually white .
There is a morphological correspondence between the length of hummingbird bills and the length of the corollas in ornithophilous flowers.
Strong positive correlations (r > 0.9) between anther height and corolla-tube length were found in both morphs.
The cotyledons and corolla of a plant are worked on by an expansive force, while the calyx and coronas are affected by a contractive force.
Long corollas usually exclude short-billed hummingbirds, whereas short corollas permit access by long- and/or short-billed birds.
In fact, none of the 627 flowers used in our field experiments had holes in the base of the corolla.
These may also benefit the plant by preventing insects from damaging the corolla when robbing nectar.
The stamens have a rigid filament and a length that places the anthers beyond the tube of the corolla precisely under its upper lip.
Corolla-tube length (a), anther height (b), stigma height (c), corolla-lobe length (d), stigma-lobe length (e), and anther length (f) were measured.
