Here we have a batch of forked panic-grass flowers that seem to be only pistillate. They really are tiny. Even down on your knees, they are hard to see. What to do? Take the lens off your camera, and look through it backwards. Terrific magnification. If your lens is permanently attached to your phone? I suspect these days there's a magnifier function. With the reversed lenses, you can get an attachment that enables you to take macro images that way. More awkward, but much cheaper than macro lenses.