What your describing sounds like Parrots Feather, Anacharis/elodea, Cabomba or hornwort. They are all invasive.

Kathy, I have a few Banana plants. I would have to look and see what is ready but I would love a few Lotus and a few other water plants I'm needing. Tami

just got my stuttgart yesterday at brians botanicals..had to chop down the 8ft plant and bring the bulb home it was so big. he also had the rest of what you were looking for there

I believe they were....the edge is under the mat...the roman numeral in the upper right is the print number. However sometimes prints like these were sold in boxed sets and not bound into a book. So it's certainly possible that yours were individual prints and not in a book. Could the dealer have called them an aquatint?....which is a form of engraving? They are hand done....sort of. In a lithograph, the artist draws the picture on a stone with a wax sort of a crayon. Then the stone is wet and an oily ink applied which doesn't stick to the wet stone, only to the waxy drawing, and the stone pressed to paper. Sometimes another stone is made to apply a different color to the same drawing, and sometime the lithograph is colored by hand. They are what is called "original prints", not the same at all as a giclee or any other photographic reproduction, they are original art. Some prints are engravings, where the picture is etched into a copper plate using a sharp tool, the plate inked and pressed onto wet paper. But with an engraving you see a "plate line"...an indented area around the picture itself. They are lovely....but I think that $200 20 years ago for a litho by a unnamed artist is steep.....a premium price from an upscale antiques shop in Atlanta.