[No Title Available]

Abstract

Editor's letterDear all, Horticultura Brasileira celebrates in 2013, with its 31st volume, thirty years of circulation! Of course, we want to celebrate with authors, readers and the editorial board, but we also want to thank their trust and engagement, without which Horticultura Brasileira would not have come this far! And, if we built our history with many and varied challenges, to challenges we dedicate our set of covers in 2013. In this first issue, Dr. Jean Carlos Cardoso talks about the challenge of developing Brazilian cultivars of ornamental plants.When it comes to challenges, in 2013 our editors have one in particular: to refine the quality of the discussion of results in the submitted papers. We wish to increasingly find relevant discussions on the causes of the reported results. This