One species mimics a small wasp while another resembles a bumble-bee queen. Note the proximity of the Pollinia and the Stigma. This species of Ophrys resembles a Bumble Bee Queen Perianth parts often produce Nectar which attracts pollinators , or defending insects who repel marauders. The flowers are pollinated by moths which have a long proboscis. Bauhinia flowers also have a tubular nectary at the base of the petals Insect with a long proboscis visiting a member of the Asteraceae Flower with a prominent Nectary.
Plumbago produces large complex trichomes which trap nectar robbers .
This insures a ready supply of nectar for its pollinator. Note the secretory trichomes on the Calyx. Note the sticky Mucilage at the top of the trichome. This traps nectar robbers before they get to the booty. Epidermal cells may also produce odors which attract Pollinators.