Ulmus minor 'Ademuz'

Ulmus minor cultivar
Cultivar	'Ademuz'
Origin	Spain

The Field Elm cultivar Ulmus minor 'Ademuz' was cloned by root cuttings from a tree growing in the eponymous town in the environs of Valencia, Spain, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid in 1996. The tree is one of a number discovered to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'. In the Madrid study, the appearance of the tree was rated 4.5 / 5, the most attractive of the selected cultivars. ^[1]

Description

'Ademuz' leaf

'Ademuz' is monopodial, and comparatively fast-growing at 100 cm per annum, the fastest of the U. minor clones under assessment at Puerta de Hierro, Madrid. The branches are devoid of corky tissue. The leaves, on 5 mm petioles, are ovate, typically oblique at the base and acuminate at the apex, the average length and width 54 × 34 mm, the margins doubly serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'medium'. ^[1]

Pests and diseases

In inoculation trials conducted in 2008, 'Ademuz' sustained approximately 10% damage (assumed to be wilting rather than die-back) against a score of c. 45% for the benchmark-resistant cultivar 'Sapporo Autumn Gold'. In 2009 'Ademuz' scored c. 18%, and Sapporo c. 21%. Ergo, 'Ademuz' would appear to have a level of resistance unprecedented in a European species. However in Italian elm trials, some Spanish U. minor clones have shewn more susceptibility to elm yellows, a phytoplasma not known to exist in the UK, than those of any other provenance. Whether 'Ademuz' shares this susceptibility is not yet known.

Cultivation

The cultivar is (2016) undergoing further trials at other locations in Spain; if completed satisfactorily it will be patented by the Spanish government and released to commerce under licence.

Etymology

'Ademuz' (Valencian 'Ademus') is derived from the Arabic 'Ad-damus', which appears to mean 'impregnable'.

References

1 2 Martin, J. et al. (2013). Seven Iberian Ulmus minor clones resistant to Dutch elm disease registered for their use as forest reproductive material. Journal of Biogeosciences & Forestry, Vol. 8, 172–180. Italian Society of Silviculture & Forest Ecology (SISEF).

Elm species, varieties, hybrids, hybrid cultivars and species cultivars

Species and varieties

Disputed species and varieties

Ulmus elliptica

Grey, grey-leafed or hoary elm

Hybrids

Ulmus davidiana var. japonica × U. minor
Ulmus × arbuscula
Ulmus × arkansana
Ulmus × brandisiana
Ulmus × diversifolia
Ulmus × hollandica var. insularum
Ulmus × mesocarpa
Ulmus × notha

Species cultivars

American elm	American Liberty Ascendens Augustine Aurea Beaverlodge Beebe's Weeping Brandon Burgoyne College Columnaris Creole Queen Deadfree Delaware Exhibition Fiorei Flick's Spreader Folia Aurea Variegata Hines Incisa Independence Iowa State Jackson Jefferson Kimley Klehmii L'Assomption Lake City Littleford Maine Markham Miller Park Minneapolis Park Moline Morden New Harmony Nigricans Patmore Pendula Penn Treaty Princeton Pyramidata Queen City Sheyenne Skinner Upright St. Croix Star Valley Forge Variegata Vase Washington Prairie Expedition

Cedar elm	Brazos Rim

Chinese elm	A. Ross Central Park = Central Park Splendor Blizzard BSNUPF = Everclear Burgundy Burnley Select Catlin Chessins Churchyard Cork Bark D.B.Cole Drake Dwarf Weeper Dynasty Ed Wood Elsmo Emer I = Athena Emer II = Allee Emerald Prairie Frosty Garden City Clone Geisha Glory Golden Rey Hallelujah Harzam = Harrison™ Hokkaido Jade Empress King's Choice Littleleaf Lois Hole Matthew Milliken Nire-keyaki Ohio Orange Ribbon Pathfinder Pendens Prairie Shade Prince Richard Red Fall Sabamiki Sagei Seiju Select 380 Sempervirens Small Frye State Fair Stone's Dwarf Taiwan The Thinker Todd True Green UPMTF = Bosque Ware's Yarralumla Yatsubusa Zettler = Heritage Ulmus parvifolia f. lanceolata

European white elm	Aureovariegata Colorans Helena Ornata Pendula Punctata Urticifolia

Field elm	Ademuz Albo-Dentata Amplifolia Argenteo-Variegata Atinia Variegata Atinia Biltii Boissieri Christine Buisman Concavaefolia Coritana Cucullata Cucullata Variegata Dehesa de Amaniel Dehesa de la Villa Dicksonii Dijkwel Erecta Folia Alba-Punctata Goodyeri Hoersholmiensis Holmstruph Hunnybunii Laciniata Lanuginosa Latifolia Majadahonda Microphylla Pendula Microphylla Purpurea Microphylla Rubra Monumentalis Pendula Picturata Plotii Propendens Purpurascens Purpurea Retiro Reverti Rubra Rueppellii Sarniensis Schuurhoek Silvery Gem Sowerbyi Stricta Suberosa Umbraculifera Gracilis Umbraculifera Virgata

Japanese elm	Discovery Freedom Jacan FS-Bieberich = Emerald Sunshine Mitsui Centennial Prospector Reperta Reseda Thomson Validation

Siberian elm	Ansaloni Aurea Aurescens Chinkota Dropmore Green King Hansen Harbin Manchu Mauro Mr. Buzz Park Royal Pendula Pinnato-ramosa Poort Bulten Puszta Pyramidalis Fiorei Variegata

Winged elm	Lace Parasol

Wych elm	Albo-Variegata Australis Cebennensis Cornuta Corylifolia Purpurea Corylifolia Crispa Aurea Crispa Dovaei Escaillard Fastigiata Macrophylla Fastigiata Stricta Fastigiata Variegata Fastigiata Firma Flava Gigantea Gittisham Grandidentata Holgeri Horizontalis Insularis Latifolia Aurea Latifolia Aureo-Variegata Latifolia Nigricans Luteo Variegata Lutescens Macrophylla Maculata Minor Nigra Oblongata Pendula Macrophylla Pendula Variegata Ramulosa Rugosa Spectabilis Tomentosa

Hybrid cultivars

Amsterdam Arno Cathedral Clusius Columella Commelin Coolshade Den Haag Dodoens Fiorente Fremont Frontier Fuente Umbria Groeneveld Homestead Improved Coolshade Karagatch Lincoln Lobel Morfeo Morton Glossy = Triumph Morton Plainsman = Vanguard Morton Red Tip = Danada Charm Morton Stalwart = Commendation Morton = Accolade Nanguen = Lutece New Horizon Patriot Plantyn Plinio Rageth Rebella Rebona Recerta Regal Repura Revera Rosehill San Zanobi Sapporo Autumn Gold Sapporo Gold 2 Stavast Toledo Urban Willis Wanoux = Vada

Dutch elm	Alba Angustifolia Balder Bea Schwarz Belgica Blandford Cinerea Dampieri Dauvessei Daveyi Dumont Elegantissima Eleganto-Variegata Etrusca Fjerrestad Freja Fulva Gaujardii Haarlemensis Hillieri Jacqueline Hillier Loke Macrophylla Aurea Major Microphylla Modiolina Muscaviensis Odin Pioneer Serpentina Smithii Superba Tricolor Tyr Vegeta (Chichester Elm) Vegeta (Huntingdon Elm) Viscosa Wredei Ypreau

Twiggy field elm	Aurea Betulaefolia Gracilis Incisa Marginata Pendula Pulverulenta Stricta Viminalis

Unconfirmed derivation cultivars

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