I have about a dozen NOids and I try to keep them in the same area in hopes that, one day, someone will ID on or more of 'em. I can dream ...
The ones I've kept all have some reason to BE kept: color, shape, fecundity, and/or form. I have a large lavender one that is stunning for the entire season and I sell a lot of it - but I have no idea what its' name is. Customers don't mind, so I don't, either.
