Ulmus 'San Zanobi'

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Ulmus 'San Zanobi'
'San Zanobi', Great Fontley, UK
GenusUlmus
Hybrid parentage'Plantyn' × U. pumila 'S 15'
Cultivar'San Zanobi'
OriginIPP, Florence, Italy

White-letter Hairstreak.[1]

Description

'San Zanobi' is a

apetalous wind-pollinated flowers appear in mid March in the UK. The sessile samarae are round to ovate, typically 15 × 18 mm.[1]

  • 'San Zanobi' leaf, and 1 Euro coin
    'San Zanobi' leaf, and 1 Euro coin
  • Samarae
    Samarae
  • Bark of 20-year-old tree
    Bark of 20-year-old tree

Pests and diseases

'San Zanobi' has a high resistance to

Dutch Elm Disease, and no losses to the disease have been observed. In trials conducted by the Istituto per la Protezione delle Piante, 'San Zanobi' sustained 19.5% defoliation and 8.5% dieback when inoculated with unnaturally high concentrations of the fungal pathogen, compared with 50% / 35.5% resp. for 'Lobel', and 95% / 100% for 'CNR118', a field elm (Ulmus minor) native to Italy.[2]

Cultivation

'San Zanobi' has been widely planted across Italy, mostly in towns and cities, notably Rome in and around the Villa Medici. Introduced to the UK by Butterfly Conservation in 2004, it was evaluated at several sites in Hampshire, where it has proven fast growing, increasing in height by up to 0.87 m and 1.45 cm stem diameter per annum. However, it was found to be intolerant of soils waterlogged over winter.[1] Among urban introductions in the UK are two specimens, planted in 2014, towards the west end of Broad Walk, Christ Church Meadow, Oxford.[4][5]

As of 1 January 2018, the export of 'San Zanobi' to the UK from Italy is prohibited, the plant unable to qualify for a phytopassport owing to the prevalence of

Elm Yellows in the region of cultivation.[6]

'San Zanobi' is not known to have been introduced to North America or Australasia.

Etymology

The cultivar is named after

Saint Zenobius (San Zanobi in Italian
), a saint noted for many miracles. After his death in AD 417, his body, whilst being carried from the cathedral for burial, is supposed to have glanced a dead elm, restoring the tree to life.

Accessions

Europe

References

  1. ^ a b c d Brookes, A. H. (2020). Great Fontley Elm Trial, 2020 Report. Butterfly Conservation, Lulworth, England.
  2. ^ a b Santini A., Fagnani A., Ferrini F. & Mittempergher L., (2002) San Zanobi and Plinio elm trees. HortScience 37(7): 1139–1141. 2002. American Society for Horticultural Science, Alexandria, VA 22314, USA.
  3. ^ Santini A., Fagnani A., Ferrini F., Mittempergher L., Brunetti M., Crivellaro A., Macchioni N. (2004). Elm breeding for DED resistance, the Italian clones and their wood properties.[1] Invest Agrar: Sist. Recur. For. (2004) 13 (1), 179–184. 2004.
  4. ^ Tim Richardson, 'Can we resurrect the English elm?', The Daily Telegraph, 6 March 2021
  5. ^ 'A brief guide to Christ Church Meadow', p.9; chch.ox.ac.uk
  6. ^ DEFRA. (2018). UK Plant Health Controls. [2]
  7. ^ Royal Botanic Garden Edinburgh, Catalogue of the Living Collections, data.rbge.org.uk; Ulmus 'San Zanobi'. Acc. no. 20180331

External links

Nurseries in Europe
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