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Passiflora 'Silly Cow' above.

Following the nomination of the Passiflora Society International (PSI) as the International Cultivar Registration Authority (ICRA) for the genus Passiflora, formal registration of cultivars* started in 2003. The Passiflora Cultivar Registrars to date are:-

  Dr John Vanderplank on the left. 2003

  Dr Les King. 2003 to 2011

  Dr Shawn Mattison 2014 onwards.

To apply for registration of a new cultivar or hybrid please contact Shawn by filling in the online form here

The downloads below, which can also be found on the PSI site here, provide a summary of the activities for the period 2003-2011; they include a number of checklists that had been produced prior to ICRA nomination, a full list of cultivars registered from 2004 - 2011 and a supplementary list of names that updates the 2003 register. Also the 1998 Wild Ridge Catalogue is included as a matter of historical interest as it lists some early hybrids by noted hybridizers Rick McCain and Patrick Worley showing correct accreditation. Wild Ridge as a seller of Passiflora closed many years ago but now Wild Ridge Organics owned by Rick and Michelle McCain trades from the same location.

*A cultivar will usually be a hybrid or, less commonly, a selected form of a species.

L.A. King 2011
Passiflora cultivars 2011 PDF (856KB)
Supplementary Passiflora cultivar list. Text PDF (251KB)

L.A. King 2004-2010
Passiflora cultivars 2004-2010 PDF (15.6MB) or TXT (112KB)
R. Fischer 2004
Passiflora Hybrids and Cultivars. Pub. in Passiflora. Passionflowers of the World. By Torsten Ulmer and John M. MacDougal 2004. Text only. PDF (257KB)
R.J.R.Vanderplank et al 2003
PSI, The International Passiflora Hybrid and Cultivar Register. Text only. PDF (273KB)
L.A. King 2003
Passiflora specimens in the RHS Herbarium, Wisley. Text only. PDF (27KB)
A. Frank, E. Kugler and L.A. King 2001
Hybrids and Cultivars of Passion Flowers. Text only. PDF (538KB)
C. Feuillet et al. 2000
PSI Hybrid list. Passiflora Vol. 10, No. 3/4. 2000. Illustrated. PDF (500KB) TXT
McCain & Worley 1998
Wild Ridge 1998 Passiflora Catalogue PDF (1.07MB)