You can look at it & make up your own form. I think you should go over y our own iris collection & pretend they are seedlings & see what works for you. there will be more things on dwarfs than on TBs. Your eye is so accustomed to daylilies it is difficult to make a 'short cut to irises.
To give an example here, as much as I like the flower, the foliage is taller than the stem & flower so may be useful is I get taller stem, but would not be an introduction.