Ulmus aff. 'Plotii'

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Ulmus aff. 'Plotii' - Wikipedia

From Wikipedia, the free encyclopedia

Ulmus aff. 'Plotii'
Young Plot-like field elms, Barlingbo, Gotland, Sweden ^[1]^[2]
Genus	Ulmus
Cultivar	Ulmus aff. 'Plotii'
Origin	Europe

Ulmus aff. 'Plotii', or 'pseudo-Plotii', was the name first used by Melville in the 1940s for elms in England, of various genotypes, that resemble but do not completely match the 'type'-tree, U. minor 'Plotii'.^[3] It was taken up again following Dr Max Coleman's findings about Plot Elm (2000)^[4] and his paper on British elms (2002).^[5]

Melville's brief description, at the end of a paragraph on Plot Elm in a 1948 paper, of "a second small-leaved elm, as yet unnamed, found in the lower Thames Valley and East Anglia", that "shares some of the curious features of the Plot Elm but lacks its graceful habit",^[6] may be a reference to his aff. 'Plotii'.

Plot-like field elms have also been observed in U. minor fringe areas outside England.^[2]^[1]

Description

Elms of the aff. 'Plotii' group "are very close to Plot Elm and have a number of characteristics of the 'type', but their crowns are too broad and regular to match 'true Plot'."^[7] They are characterised by some or all of the following diagnostic features: a mature crown of unilateral habit; short shoots that produce more than five leaves in a flush; subequal cordate leaf base; and red club-shaped glandular hairs on leaf surface.

Pests and diseases

The trees are susceptible to Dutch elm disease, but as they produce abundant root-suckers immature specimens probably survive in their areas of origin.

Cultivation

A few Plot-like field elms have entered cultivation (see Accessions below).

Two trees formerly labelled U. minor subsp. minor × U. minor var. lockii, and referred to in Coleman (2000) as 'pseudo-Plotii',^[4] that stand (2016) in the Royal Botanic Garden, Edinburgh, have been re-classified on the RBGE database as U. minor 'Umbraculifera Gracilis'.^[8] An elm cultivar of the same clone and similar age, also formerly known as U. aff. 'Plotii',^[7] stands on Whitehouse Loan, Bruntsfield Links, Edinburgh.^[9]

Hybrids

This group of elms is likely to hybridize in the wild both with wych elm and with U. minor.

Accessions

Wakehurst Place Garden, Wakehurst Place, UK, as U. plotii. Acc. no. 1977–6692 (ex. Tedstone de la Mere SO692587. Melville ref. 7677), collected by Melville.^[11]^[4]

References

^ ^a ^b Johansson, K. (1924). "Om vära almar" [About our elms] (PDF). Lustgården. 5: 62. Retrieved 13 February 2018.
^ ^a ^b Johansson, K. (1921). "Bidrag till kännedom om Gottlands Ulmus-former" [Contribution to knowledge of Gottland's Ulmus forms]. Svensk Botanisk Tidskrift. 15 (1): 9. Retrieved 14 February 2018.
^ "Herbarium specimen - L.4214727". Botany catalogues. Naturalis Biodiversity Center. Specimen labelled Ulmus aff. plotii by Melville (Newport, Essex, 1949); "Herbarium specimen - L.4213929". Botany catalogues. Naturalis Biodiversity Center. Specimen labelled Ulmus aff. plotii by Melville (Ware, Hertfordshire, 1949)
^ ^a ^b ^c Coleman, M.; Hollingsworth, M. L. & Hollingsworth, P. M. (2000). "Application of RAPDs to the critical taxonomy of the English endemic elm Ulmus plotii Druce". Botanical Journal of the Linnean Society. 133 (3): 241–262. doi:10.1111/j.1095-8339.2000.tb01545.x.
^ Coleman, Max (2002). "British elms". British Wildlife. 13 (6): 390–395.
^ Melville, Ronald, 'The British Elms', The New Naturalist, Collins, London, 1948, p.40
^ ^a ^b Coleman's description, in correspondence, 2013.
^ "Former aff. 'Plotii', RBGE".
^ "Former aff. 'Plotii', Bruntsfield Links, Edinburgh".
^ bioportal.naturalis.nl, specimen L.3185175
^ Detailed results from Living collection for ulmus plotii: ePIC - Detailed results from Living collection for ulmus plotii, accessdate: July 29, 2016

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

Species, varieties and subspecies

Disputed species, varieties and subspecies

Hybrids

Species cultivars

American elm	American Liberty Ascendens Augustine Aurea Beaverlodge Beebe's Weeping Brandon Burgoyne JFS Prince II College Columnaris Creole Queen Deadfree Delaware Exhibition Fiorei Flick's Spreader Folia Aurea Variegata Great Plains Hines Incisa Independence Iowa State Jackson Jefferson Kimley Klehmii L'Assomption Lake City Lewis & Clark 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
Cedar elm	Brazos Rim
Chinese elm	A-1 A. Ross Central Park Blizzard BSNUPF Burgundy Burnley Select Catlin Chessins Churchyard Cork Bark D. B. Cole Drake Dynasty Ed Wood Elsmo Emer I Emer II Emerald Prairie Frosty Garden City Clone Geisha Glory Golden Rey Hallelujah 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 Ware's Yarralumla Yatsubusa Zettler Ulmus parvifolia f. lanceolata
European white elm	Aureovariegata Colorans Helena Ornata Pendula Punctata Urticifolia
Field elm	Ademuz Albo-Dentata Amplifolia Argenteo-Variegata Atinia Atinia Pyramidalis Atinia Variegata Bea Schwarz Biltii Christine Buisman Concavaefolia Coritana Cretensis Cucullata Cucullata Variegata Dehesa de Amaniel Dehesa de la Villa Dicksonii Dijkwel Erecta Folia Alba-Punctata Glandulosa Goodyeri Hoersholmiensis Holmstruph Hunnybunii Hunnybunii pseudo-Stricta Laciniata Lanuginosa Majadahonda Microphylla Pendula Microphylla Purpurea Microphylla Rubra Monumentalis Pendula Picturata Plotii Propendens Punctata Purpurascens Purpurea Retiro Reverti Rugosa Rueppellii Sarniensis Schuurhoek Silvery Gem Sowerbyi Stricta Suberosa Umbraculifera Gracilis Umbraculifera Viminalis Viminalis Aurea Viminalis Betulaefolia Viminalis Gracilis Viminalis Incisa Viminalis Marginata Viminalis Pendula Viminalis Pulverulenta Viminalis Stricta Virgata Webbiana
Japanese elm	Discovery Freedom Jacan JFS-Bieberich Mitsui Centennial Prospector Reperta Reseda Thomson Validation
Siberian elm	Ansaloni Aurea Aurescens Chinkota Dropmore Dwarf Weeper Green King Hansen Harbin Manchu Mauro Mr. Buzz Park Royal Pendula Pinnato-ramosa Poort Bulten Puszta Pyramidalis Fiorei Zhonghua Jinye
Winged elm	Lace Parasol
Wych elm	Albo-Variegata Australis Camperdownii Cebennensis Concavaefolia Cornuta Corylifolia Purpurea Corylifolia Fastigiata Macrophylla Fastigiata Stricta Fastigiata Variegata Firma Flava Gigantea Gittisham Grandidentata Holgeri Horizontalis Insularis Latifolia Latifolia Aurea Latifolia Aureo-Variegata Latifolia Nigricans Luteo Variegata Lutescens Macrophylla Maculata Minor Nana Nigra Nitida Oblongata Pendula Macrophylla Pendula Variegata Pyrenaica Spectabilis Superba Tomentosa

Hybrid cultivars

Androssowii Amsterdam Arno Cathedral Clusius Columella Den Haag Dodoens Escaillard Fiorente Frontier Fuente Umbria Homestead Karagatch Lobel Morfeo Morton Morton Glossy Morton Plainsman Morton Red Tip Morton Stalwart Nanguen New Horizon Patriot Plantyn Plinio Rebella Rebona Recerta Regal Repura Revera San Zanobi Sapporo Autumn Gold Sapporo Gold 2 Stavast Toledo Urban Wanoux Wingham
Dutch elm	Alba Angustifolia Balder Belgica Blandford Canadian Giant Cicestria Cinerea Commelin Dampieri Dauvessei Daveyi Dovaei Dumont Elegantissima Eleganto-Variegata Etrusca Fastigiata Fjerrestad Folia Rhomboidea Freja Fulva Gaujardii Groeneveld Haarlemensis Klemmer Loke Macrophylla Aurea Major Microphylla Modiolina Muscaviensis Odin Pioneer Pitteurs Serpentina Smithii Superba Tricolor Tyr Vegeta Viminalis Viscosa Wentworthii Pendula Wredei Ypreau
U. × intermedia	Coolshade Fremont Improved Coolshade Lincoln Rosehill Willis

Unconfirmed derivation cultivars

Fossil elms

U. okanaganensis

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