Aphaenogaster workers tasting the elaiosome of a bloodroot seed. Illinois.
Some plants have come to rely so heavily on ants to spread their seeds about that they offer the insects a tasty treat in exchange for the dispersal service. Seeds of these species bear a lipid-filled structure called an elaiosome, whose sole function appears to be the attraction of ants. A recent study suggests that plant lineages dependent on ants in this way speciate more rapidly than related ant-free lineages.
photo details (both photos): Canon MP-E 65mm 1-5x macro lens on a Canon EOS 50D
ISO 100, 1/160 sec, f13, indirect strobe in a white box
More like this
Earlier I listed my pick of the best insect photos of the year taken by other photographers. Now it's my turn. In 2009, I snapped 8000 exposures to produce 805 processed, saleable images of live insects.
Wonderful photos--lots to see in them.
Does anyone have a fairly complete list of plants distributed in this way?
MILTA: The study I linked in the post has a pretty extensive list.
Interesting -- and great photos.