Registrar Passiflora Damsel's Delight

Passiflora ‘Damsel’s Delight’ 

Passiflora Passion flower | Cultivar / hybrid lists

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

Lists have been produced independently by Feuillet et al (2000), Kugler & King (2001), Roland Fischer (2004) and in 2020 Rasmus Hurup’s impressive online searchable database of all Passiflora cultivars. Also they have been produced by successive Registrars of the Passiflora Society International (PSI) which was nominated as the International Cultivar Registration Authority (ICRA) for the genus Passiflora from 2003 to date. Over 700 Passiflora hybrids or passion flower hybrids and cultivars have been registered and many more remain unlisted.

Only a small percentage of the known hybrids are commercially available however, and many listed have been lost to cultivation. Some of the best known and most spectacular can be seen on this site in the hybrid section. Learn how to create your own hybrids here. If you have any success email Robert Rice the Passiflora Cultivar Registrar, for registration of new cultivars or hybrids.The Passiflora Cultivar Registrars to date are:-

John Vanderplank

 

Dr John Vanderplank on the left and myself. 2003

Les King

 

Dr Les King. 2003-2011

Shawn Mattison

 

Dr Shawn Mattison 2014-2015

Robert Rice

 

Robert Rice 2016-onwards

The list below includes both all the independent lists and all those produced by the PSI Registrars from 2003 to date. Unfortunately no lists have been published by the PSI since 2015. 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.

R. Hurup 2020 Passiflora cultivars. List of all Passiflora cultivars
An online searchable database. (Also includes species)
 S. Mattison 2015 Passiflora cultivars 2014-15 PDF (273MB)
Supplementary Passiflora cultivar list. PDF  (45MB)
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 PDF (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)
 

Check out the RIVERSIDE® Hybrids by Myles Irvine.

kc18

Unreleased cross of P. kermesina & P. caerulea

Passiflora Cultivars and Hybrids

Often used interchangeably what is the correct use of these words? A hybrid is not always a cultivar and a cultivar is not always a hybrid.

Cultivar is a ‘portmanteau’ word, that is, two words joined together and shortened. It means ‘cultivated variety’.  Simply, something that has been selected and cultivated by humans. A cultivar can have wild origins, e.g. a selection of a species such as Passiflora loefgrenii ‘Iporanga’, a plant collected from Iporanga in Brazil, or can be selected from a seed packet you have bought, seed from market bought fruit, or fruit or plants in your greenhouse or garden that have occurred naturally. e.g. Passiflora ‘Constance Eliott’, a white selection of Passiflora caerulea that occurs randomly from seed. Cultivars can also be created by human-induced hybridisation (i.e., breeding). Just as an example, the holly cultivar Ilex ‘Sparkleberry’ is a controlled hybrid between I. serrata and I. verticillata the U.S. National Arboretum released.

A hybrid is a plant created by cross pollination between two different plants to produce fruit with viable seed which is then germinated. The parents can be different species, different selections of the same species, a species and an existing hybrid or two different hybrids. Passiflora ‘Snow Queen’ is an example of a hybrid. Hybrids can also occur naturally in the wild, with some Passiflora such as Tacsonia and Dysosmia more prone to this than others.

Naming

A hybrid may by convention be named in one of two different ways: as a cultivar or as a ‘nothospecies’.

Cultivars must be registered through an International Cultivar Registration Authority (ICRA) and are regulated by the International Code of Nomenclature for Cultivated Plants (ICNCP). Typically, cultivars would fall into the category of manmade crosses or selections. Parents by convention are listed with the female plant first, and the cultivar name must conform to the following format. Passiflora in italics, then the hybrid name in single inverted commas and the name or names capitalised but no italics. e.g.

Passiflora sanguinolenta (f) x Passiflora citrina (m) = Passiflora ‘Adularia’.

Nothospecies, on the other hand, must be published in a peer-reviewed scientific journal and follow the strict rules in the International Code of Nomenclature for algae, fungi, and plants (ICN). Often, nothospecies are natural hybrids that have occurred in the wild. The naming convention is quite different, again the species is in italics, followed by the multiplication sign x in lower case (no italics) then the chosen name, again in italics.e.g.

 Passiflora alata (f) x Passiflora caerulea (m) = Passiflora x belotii.

Other examples include Passiflora x exoniensis and Passiflora x violacea. These can occasionally be subdivided when the same parents have given rise to different distinct offspring. e.g. P. x violacea ‘Eynesford Gem’. This can also be shortened to P. ‘Eynesford Gem’

There has been understandable confusion as to whether Passiflora x belotii can or indeed should be written as Passiflora ‘Belotii’. The answer: it should not. Thanks to Dr. Harlan Svoboda for clarifying as to why.

Dr. Svoboda comments, “the ‘x’ must be used in this instance because the entity is a nothospecies (not a cultivar) and was named under the provisions of the International Code of Nomenclature. This means that even though it is a hybrid it is written with a single epithet name and then the ‘x’ to indicate it is a nothotaxon. See Article H.3 of the Code (excerpt below). This name was not published as a cultivar, which would follow the International Code of Nomenclature for Cultivated Plants and would require the cultivar name (not an epithet) to be written in single quotation marks. The latter would be the case for something like Passiflora ‘Lady Margaret’ which is a registered cultivar name for a particular hybrid and not a nothospecies.”

Hybrid names

In 30 years of growing I have to date named only about a dozen hybrids, the best of which have been selected to be commercially available. See Riverside® Passiflora.