Hi Marilyn! Did you have a chance to take a look at the pics under the K. delagoensis/tubiflora entry? They have a distinct shape to the leaf, tubular/round in cross-section.
Booker's plant in the K. daigremontiana entry may be a faded/etiolated K. daigremontiana but all of the other pics (flower macros notwithstanding, quite a few species of Kal can't be distinguished by blooms alone) look like other plants to me. The name K. daigremontiana is a catch-all all over the internet for all kinds of Kalanchoes. It's difficult to find a pic of the real deal on a reliable source. I consider RHS to be one, and I have all of the plants in question except K. daigremontiana. It's not a common plant, compared to other Kalanchoes.
