Ken Preston-Mafham, Rod & Ken Preston-Mafham, UK, England

adnot.: Akronym PM.
Rovnaký akronym PM použili tiež Pavel Malík, Czech Rep. (Brodek u Prostějova) a Peter Momberger (MB), Germany. [dat. Antálek, Podešva, www 2002]
pub.: Rod a Ken Preston-Mafham, Cacti: The Illustrated Dictionary, 1997

Nálezy

• PM 151.....(Sulcorebutia kruegeri) - Cochabamba, Cochabamba, # - (dat. R. R. Martin, Field Number Database, stav 2007) > krugeri
• PM 156.....(Sulcorebutia polymorpha) - # - (dat. Atlas 2004) // (S. steinbachii v. polymorpha) - (dat. SuccSeed 2003 fotogal)
• PM 157.....(Sulcorebutia polymorpha / tiraquensis) - (dat. Atlas 2004)
• PM 162.....(Sulcorebutia oenantha) - Cochabamba, Totora, # - (dat. RM FND)
• PM 163.....(Sulcorebutia pampagrandensis) - Cochabamba, Pampa Grande, # - (dat. RM FND)
• PM 166.....(Sulcorebutia verticosior v. aureiflora) - Chuquisaca, Tarabuco, # - (dat. RM FND) // (S. tarabucoensis v. aureiflora) - (dat. E. & J. de Vries, 2009)
• PM 181.....(R. albopectinata) - Chuquisaca, Culpina, # - (dat. RM FND)
• PM 188.....(heliosa v. condorensis) - Tarija, # - (dat. SuccSeed 1999)
• PM 191.....(R. albopectinata) - Chuquisaca, Culpina, # - (dat. rebutia.org.uk 2020) > pozri pod R. supthutiana
• PM 309.....(R. deminuta) - Quebrada de Escoipe, # - (dat. RM FND)
• PM 319.....(R. minuscula) - Quebrada del Toro, dolný (južný) koniec, # - (dat. RM FND) > xanthocarpa ? senilis ?
• PM 329.....(R. minuscula, = wessneriana?) - Jujuy, cesta ku Tiraxi, # - (dat. RM FND)
• PM 332.....(R. minuscula, = wessneriana?) - Jujuy, Volcan, # - (dat. RM FND)
• PM 342.....(R. minuscula) - Quebrada del Toro, Chorrillos, # - (dat. RM FND)
• PM 367.....(pygmaea, =MN 229a) - Iruya, # - (dat. SuccSeed 2002)
• PM 369.....(R. jujuyana) - Salta, Iruya, # - (dat. RM FND)
• PM 370.....(buiningiana) - # - (dat. SuccSeed 1999)
• PM 373.....(R. atrovirens) - La Quiaca-Santa Victoria, # - (dat. RM FND)