(1) As is now regarded as typical of bat-pollinated flowers, the corolla is sturdy and the nectary disk is large.(2) From each plant one randomly chosen, fresh flower was dissected under a binocular microscope to separate the corolla , androecium and gynoecium.(3) The internal length of the flower corolla was measured from base to opening.(4) In contrast, pollinator observations demonstrated that hawk moths visited flowers with larger corollas , and that the probability of producing a fruit for natural pollination plants increased with corolla diameter.(5) In addition, experimental flowers that matured a fruit (and therefore received a visit) had significantly larger corollas compared with corollas of flowers that did not initiate a fruit.
