We found strong positive correlations between anther height and corollatube length in both morphs.
Strong positive correlations (r > 0.9) between anther height and corolla-tube length were found in both morphs.
For anther height, and anther length, we measured the mean value for three anthers in each flower.
A plant was considered as having reached anthesis or silking if at least one extruded anther or one silk was visible.
Before being released from the anther, the pollen grain usually becomes desiccated and enters in a phase of stasis.
The insects touched stigmas and anthers when collecting pollen and nectar.
The electron-dense inclusions in the outer layer of the intine of pollen at the open anther stage are probably remnants of the degraded cytoplasmic channels.
The stamens have a rigid filament and a length that places the anthers beyond the tube of the corolla precisely under its upper lip.
