I was able to spend a couple of hours today making a test of how the ghost orchid might look in applique. It comes out to about 14 x 18 inches, and there is more color and pattern in the fabrics than shows in the photo; colors lean more to greenish and yellowish whites too. I'm fairly satisfied with the shapes, but there would need to be more detail on petals and sepals, with more fabrics used and with machine embroidery. In addition, I have no idea of a composition for this thing, or not much idea anyway. I'll let this marinate for a while and then maybe do a test pieced block. I'm feeling less and less inclined for piecing though, since I don't think I can spend that much time. Thanks for everyone's comments and ideas.
----------
After posting, it is clear to me that this thing needs major jazzing up--different fabrics (which will mean shopping, I think), lots of interesting stitching, something. Insipid is the word that comes to mind. Oh, well--it's only a rough draft.