Actually the form that Juamei linked to above appears to do that pretty well, especially with the supporting notes. There are some terms I'd never heard of, e.g. "lobate", but that potentially makes it educational too (I had to look it up and will now use it in my fieldnotes, just to try to sound clever).

I still have the "Cameron with placard" image about this though, I'm too entrenched/cynical to shake that off.