the seed leaf, usually the first leaf or leaves which are produced and which usually differ from the following leaves.
Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-17
Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A.
. Flora of Zambia: Glossary details: cotyledon.
http://www.zambiaflora.com/speciesdata/glossary-display.php?glossary_id=179, retrieved 27 April 2017