Nice list!
I think the works of some of the German botanists such as Engler and
Prantl ought to rate at least an honorable mention. Much of their
family-level work stands today. I would also include works of
Cronquist, as well as _Genera Plantarum._
How about something on the science/art of perspective? A treatise on
mapmaking? Mendel's work?
Good stuff!
M. Reed