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Magnolia × pruhoniciana Jakl

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Credits

Julian Sutton (2022)

Recommended citation
Sutton, J. (2022), 'Magnolia × pruhoniciana' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/magnolia/magnolia-x-pruhoniciana/). Accessed 2024-04-17.

Genus

Other taxa in genus

Glossary

F2
The second generation of progeny from an original hybridisation event; derivatives from the generation.
stamen
Male reproductive organ of flower. Usually composed of an anther and a filament.
ovate
Egg-shaped; broadest towards the stem.

Credits

Julian Sutton (2022)

Recommended citation
Sutton, J. (2022), 'Magnolia × pruhoniciana' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/magnolia/magnolia-x-pruhoniciana/). Accessed 2024-04-17.

Magnolia × pruhoniciana

Magnolia × pruhoniciana: material derived from the Průhonice Park hybrids at Arboretum Wespelaar. Like its parents, leaves are borne in false whorls (29th May 2014). Image Philippe de Spoelberch.

USDA Hardiness Zone 7-9

RHS Hardiness Rating H5

This name covers all hybrids between Magnolia obovata and M. tripetala, including F2 and subsequent generations, as well as backcrosses to either parent. Known only from gardens, it has originated spontaneously at the Arnold Arboretum, MA (see ‘Silver Parasol’ below), and through controlled crosses made by Viktor Keskevič at Průhonice Park, Czechia, before 1952 (Jakl 2013; Spongberg & Weaver 1981) as well as later breeders. F2 seedlings have arisen at Průhonice; material has been distributed to other Czech and Belgian collections.

These hybrids are decidous, medium trees, with elliptic to ovate leaves of 20–45 × 10–22 cm, in false whorls. Flowers are white, 16–25 cm across, held erect at the ends of branches, with 11–12(–15) tepals, the outer three brownish-pink, reddish filaments and pink stigmas. They can most reliably be distinguished from the parents by their intermediate fruit characters as shown in the table (Jakl 2013):

FolliclesStamen scars
M. obovata(108–)130–163(–209(143–)169–195(–214)
M. × pruhoniciana(58–)91–107(–145)(92–)113–148(–159)
M. tripetala(24–)51–63(–79)(65–)76– 89(–114)
Magnolia × pruhoniciana

A second clone of Magnolia × pruhoniciana from the Průhonice Park stock at Arboretum Wespelaar. (29th May 2014). Image Philippe de Spoelberch.

Magnolia × pruhoniciana

Magnolia × pruhoniciana (Arboretum Wespelaar, 17th May 2014). Image Philippe de Spoelberch.

'Silk Road'

Flowers moderately fragrant; tepals white, narrow. A backcross with M. tripetala by Dennis Ledvina, WI; a parent of the intersectional hybrid ‘Melissa Parris’.

Magnolia × pruhoniciana 'Silk Road'

Magnolia × pruhoniciana 'Silk Road' (5th June 2021). Image Caerhays Estate.

Magnolia × pruhoniciana 'Silk Road'

Magnolia × pruhoniciana 'Silk Road' (5th June 2021). Image Caerhays Estate.

Magnolia × pruhoniciana 'Silk Road'

Magnolia × pruhoniciana 'Silk Road', with leaves in false whorls (28th May 2020). Image Caerhays Estate.

'Silver Parasol'

Flowers in late spring to early summer (late May to June, Massachusetts), 20–25 cm across, sweetly fragrant; leaves only slightly glaucous beneath. Raised from seed of M. obovata at the Arnold Arboretum, and labelled as such until its hybridity was recognized; a probable sister seedling was found at Hunnewell Estate, MA (Spongberg & Weaver 1981).

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