The flower, white with maroon lines, could be construed by the imaginative as snake-tongue-shaped.
From the sfgate.com
The tongue is flicked rapidly and repeatedly into a flower, the upper mandible then compressing any liquid out when the bill is closed.
From the en.wikipedia.org
The nectar typically sits at the base of the flower, and to reach it the bumblebee has to unfurl its tongue to taste the flower's sweet reward.
From the scientistatwork.blogs.nytimes.com
If the depth of the flower is longer than the tongue of the bumblebee, it's unlikely that the bumblebee would visit that flower to get nectar.
From the scientistatwork.blogs.nytimes.com
For instance, if they are bat pollinated they are often not brightly coloured but grow so that the bat can easily poke its tongue into the top of the flower.
From the guardian.co.uk
Each time a bee drains a flower of nectar with her long tongue, she leaves odorous footprints which warn subsequent arrivals that it is empty and saves them wasting time exploring it.