(posting on behalf of Diana Chapman) I really wonder about that, though. Isn't it just as likely that in ancient times there was one basic Erythronium, then as climate and geographic changes isolated populations they evolved into different species. Just because there is pink in E. elegans (and it grows quite a distance from any E. revolutum that I know, and a VERY long way from E. montanum), doesn't mean it has E. revolutum in its ancestry. All of these: E. revolutum, oregonum, californicum and elegans are going to be very very close genetically, so just the expression or repression of a few genes could be responsible for the color variation. Diana Chapman On 13/01/2016 18:40, youngs wrote: > New Bulb Log 2 of 2016 online with garden and weather update & 4 more > chapters of 'Erythroniums in Cultivation' > These are three species Ian finds more challenging to grow , E. > purpurescens, E. pluriflora and E. taylorii plus a potentially new > species. > > http://srgc.org.uk/logs/logdir/… > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > -- David Pilling http://www.davidpilling.com/