a surface area well-defined by bounding veinlets, lines or cracks; used to describe the raised area on the surface of the seeds in the Fabaceae subfamily Mimosoideae; also the area where spines and glochids arise on the stems of Cactaceae.
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: areole.
http://www.zambiaflora.com/speciesdata/glossary-display.php?glossary_id=48, retrieved 29 March 2017