It is thought to have had entomophilous pollination. The plants are hermaphroditic and are pollinated mostly by insects (entomophilous); flower nectaries are lacking. Most species are entomophilous (pollinated by insects). Flowers of the entomophilous genus "Papaver", also of the "Ranunculales" order, produce only pollen. The flowers are entomophilous, pollinated by insects. Flowers that are insect-pollinated are called "entomophilous"; literally "insect-loving" in Greek. Water lily flowers are entomophilous, meaning they are pollinated by insects, often beetles. These plants are hermaphroditic and entomophilous, and their flowering period extends from April through July. Others, such as "Thalictrum sparsiflorum", are entomophilous (pollinated by insects). "Astrantia major" is an entomophilous plant, mainly pollinated by beetles, but also by other insects. "Astrantia maxima" is an entomophilous plant, mainly pollinated by beetles, but also by other insects. "Astrantia carniolica" is an entomophilous plant, mainly pollinated by beetles, but also by other insects. "Astrantia bavarica" is an entomophilous plant, mainly pollinated by beetles, but also by other insects. Most cultivated plants with showy flowers are entomophilous and do not cause pollen allergies.