Beatrice Goes to the Park
My assistant Beatrice, happily collecting pollen at a local park.
The flower is the notorious exotic punctureweed, Tribulus cistoides, bane of bare feet, paws and bicycle tires. However, honey bees LOVE this plant and it's nutritious pollen. Punctureweed has also been used medicinally to treat such ailments as headache, nervous disorders, and constipation. The Genus name Tribulus is of ancient Roman origin and refers to a weapon called a caltrop, used to slow the advance of human troops and their mounts. The seeds of Tribulus species are similar in shape and have much the same effect.
Here is the T.M.I. plants.ifas.ufl.edu/node/652