Have a look at an infra-red image of a flowering Arum. Arnold http://pacificbulbsociety.org/pbswiki/index.php/… Jun 21, 2011 09:20:21 AM, pbs@lists.ibiblio.org wrote: Hi, In message <3FCC1060-9AC3-4F49-B6C1-5C986E260BD6@mac.com>, KEVIN INKAWHICH writes >What are some species of thernogenic flowering plants? Alas the changing of the PBS list archive article numbers means a Google search won't answer your question. These are some replies to the original thread that help: http://pacificbulbsociety.org/pbslist/old.php/… http://pacificbulbsociety.org/pbslist/old.php/… -- David Pilling email: david@pilling.demon.co.uk web: http://www.davidpilling.net/ post: David Pilling, P.O. Box 22, Thornton-Cleveleys, Blackpool. FY5 1LR. UK