Story
Stems and leaves to go with paper flowers are traditional folds, and nobody knows who folded them first. Several origami books and websites show stems like this one as traditional designs. A narrow diamond made by folding the edges to a diagonal is folded in half and one point is turned up: the stem and the leaf come from the same sheet.
Did you know? Stand several of them pointing up and they look like a patch of grass — that is why the same fold is also called “grass”.