A sorghum head doesn't really flower, it emerges and then sort of sheds a bunch of pollen from top to bottom which fertilizes each potential seed.
Even though it doesn't flower in the typical flower sense, today I noticed that there were honeybees on the heads gathering what looked like orange pollen. If I hadn't seen it myself, I never would have thought that honeybees would gather pollen from grain sorghum. Apparently the local honeybees are camera shy because they made a bee-line for home as soon as I pointed the camera at them so you're going to have to take my word for it.
|Five seconds ago there was honey bee gathering sorghum pollen in this picture|
|An awful picture of an average stand of grain sorghum|