Window flowers
David Ehrlich (Sat, 06 Nov 2010 10:38:40 PDT)
Alberto Castillo wrote > The bottom of the cup is more clear in several species
of Cypella and may be seen as a circle of light by the insect flying downwards
to the flower.
Or, I guess, by beetles underneath.
Thank you very much Alberto. This explanation makes a great deal of sense.
David E.