Those are Trichomes

Yes, that is a leaf of Glycine max L. Merr seen at about 200x photographed by yours truly in 2004 for a plant anatomy course at UIUC that was tedious but very educational. Feel free to use it as a visual aid to illustrate trichomes, leaf vasculature, or even waxy cuticle if you have any reason to be speaking about any of these things.