Hi folks. This plant was the subject of a discussion on another site. It seems that Kalanchoe thyrsiflora is rarely if ever available for sale. The plant that is commonly sold by that name is actually Kalanchoe luciae.
This link was given by purpleinopp in answer to a question I asked regarding the difference between the two.
http://www.smgrowers.com/info/...
The following is from a post by user palmbob on the other site. He has written a number of articles about cacti and succulents among other plants:
"Main reason I do not think that is Kalanchoe thyrisflora is that K thyrsiflora is virtually unknown in the plant trade (despite its frequent usage as identification for K luciae). I have yet to see this plant in a single private collection or for sale (though occasionally I think it is offered by the Huntington, who has the only collection of this plant I know of)."