"2n" just means just the whole set of chromosomes in the plant's cells. For a diploid of 2n=22 species, the triploids have a total of 33 chromosomes per cell, so 2n=33 for those triploid sorts. It also suggests why most triploids and why petiolatum with 2n=77 do not often set seeds. Jim S. On Tue, Jan 13, 2015 at 12:49 AM, Leo Martin <stnalpsoel@gmail.com> wrote: > > 2n = 77 > > ? New math ? > > Leo Martin > Zone ? > Phoenix Arizona USA > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > -- James Shields jshields46074@gmail.com P.O. Box 92 Westfield, IN 46074 U.S.A.