With over one hundred members to this group, it is the largest hormone grouping known and secondarily stimulates the production of amylase.  
Members belonging to this family of hormones are diterpenes synthesized from acetyl CoA via the mevalonic acid pathway.  Members sometimes contain a fifth ring that is a lactone.  With over one hundred members to this group, it is the largest hormone grouping known and secondarily stimulates the production of amylase.  Its primary functions are to stimulate flowering and stem elongation, though it has little effect on roots unlike auxins.  Discovered by Kurosawa, FTP, identify this plant hormone family used in seed germination.
Members belonging to this family of hormones are diterpenes synthesized from acetyl CoA via the mevalonic acid pathway.  
gibberellins or gibberellic acid