This very cool weed sprung up in the yard. Let's take a picture for later!
"A note must be made upon the drawing of the turn-over of the leaf. The old draughtsman followed the rule in the accompanying diagram. They broke the nearer outline into two, one overlapping the other as it were, leaving a small passage between them as if the leaf were very thick. This is a very valuable convention and practically indispensable to the decorator."
Richard G. Hatton, A Handbook of Plant and Floral Ornament (Dover, 1960), 40. Republication of The Craftsman's Plant-Book, 1909.