Smith, Gideon F.; Klopper, Ronell Renett; Jackson, Peter Wyse; Crouch, Neil R.(Missouri Botanical Garden Press, 2017-11-17)
The Species Plantarum Programme: Flora of the World (SPPFW) has been in existence for slightly more than two decades and
during this time published basic taxonomic information for just over 1000 species, in 11 families. ...
