The following is a list of cultivated species which at least some of the time possess this spot-character.
Number of species: 1
Copyright: Mark Hyde, Bart Wursten and Petra Ballings, 2002-13
Hyde, M.A., Wursten, B.T. & Ballings, P.
. Flora of Zimbabwe: List of cultivated species with each spot-character: Corolla resupinate.
http://www.zimbabweflora.co.zw/cult/species-spot-display.php?spot_id=908, retrieved 26 May 2013