the seed leaf, usually the first leaf or leaves which are produced and which usually differ from the following leaves.
Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-17
Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M.
. Flora of Zimbabwe: Glossary details: cotyledon.
http://www.zimbabweflora.co.zw/speciesdata/glossary-display.php?glossary_id=179, retrieved 24 March 2017