I felt that this thread needed an infusion of setanta, an hes busy right now, so it was left up to me to be the bearer of honesty.
So GW , you think that merely knowing plants names will redeem you , fie , hah, hah I say, ... whats a trout lily and what would you suggest for a tall shade background the abuts a garden wall but is shaded by a weeping cherry. We have lamium and Im getting tired of the lamium behind the hostas. I want something tall and something that visibly divides.
For tall shade plants (average soil, neither too wet or dry) I suggest the native Cimicifuga racemosa (aka: fairy candles, bugbane)
or any of the Angelicas.
Pictured is archangel (European), but you can get Angelica gigas (Asian) which is more purple or the bright green American artopurpurea. They also have some new varieties of astilbe that have very tall deep purple and red plumes, a good garden center will carry them or order them on-line.
This is a picture of trout lily (Erythronium). The native is yellow and this is the selected variety called Pagoda. The European trout lily is pink (Erythronium dens-canis).
I have to defend the use of latin, especially when ordering plants - there is nothing worse than someone coming in and asking if you have "daisies" or "coneflowers" or the plant grandma called "wake robin". It can take a long time to figure what they a person wants with descriptions like that. I don't expect the general public to speak latin like the Pope, but it's nice for a gardener to at least learn the latin of the plants they want to grow.
Good books: The American Woodland Garden by Rick Darke or The New England Wildflower Society Guide to Growing Wildflowers by William Cullina or The Natural Shade Garden by Ken Druse.
Sorry to stretch the page out - I'm a gardener, not a computer geek.