Makes sense that the sunflower bee (Svastra spp.) forages on the genus Cosmos.

Cosmos (also the common name) is a member of the sunflower family, Asteraceae.

Sunflower bee: sunflower family. A specialist bee.

On a recent trip to the Luther Burbank Home and Gardens in Santa Rosa, we spotted scores of sunflower bees on cosmos, each bee packing a heavy load of golden pollen. 

There was a pollen party going on, pure and simple. 

Although the sunflower bee, as a floral visitor, is often mistaken for a honey bee, there's no mistaking that this is a pollinator, too.