Green Energy

Pollen isnt sperm. Pollen is the heavily regressed secondary generation. All plants follow alternate generations.

Pollen is the male semiclonal offspring of a dominant angiosperm form. The female lives within the heart of flowers, where they wait for pollen males to arrive and enseminate them.

And, yes, the definition of powder is a dry solid that sheers into fine particles. Pollen isnt a dry solid, its a bunch of organisms that are just very small. You could turn pollen into powder by killing, crushing, and drying it. But thats the same as sawdust.