The Chinese elm cultivar Ulmus parvifolia 'Hokkaido' is an older cultivar of Japanese origin.
Description A dwarf variety with small green leaves, and with corky bark in older specimens.Hilliers' Manual of Trees & Shrubs (2002), p.370. David & Charles, Newton Abbot, UK 'Hokkaido' has been considered "too small for common size bonsai".Valavanis, W. N. (1982). Proc. Intern. Plant Prop. Soc. 32: 502–508, 1982.
Cultivation 'Hokkaido' is relatively common in commercial cultivation on both sides of the Atlantic.
Synonymy 'Microphylla': Anon. Ulmus parvifolia 'Pygmaea', name in synonymy
Accessions North America
Denver Botanic Gardens, US. No details available. Holden Arboretum, US. Acc. no. L-98-506 New York Botanical Garden, US. Acc. no. 1385/96
Europe
Cambridge Botanic Garden , University of Cambridge, UK. No details available. National Botanic Gardens , Glasnevin, Dublin, Ireland. Location AY Royal Botanic Garden Edinburgh, UK. Acc. no. 19772625 Royal Botanic Gardens Kew, UK. (as cv. 'Pygmaea'). Acc. nos. 1983–5054, 1984-3631 Royal Horticultural Society Gardens, Wisley, UK. No details available. Sir Harold Hillier Gardens, Ampfield, Hampshire, UK. Acc. no. 2005.0996 Hortus Botanicus Amsterdam, Amsterdam, Netherlands. Acc. no. 850208
Nurseries North America ForestFarm , Williams, Oregon, US. North American Plants , Lafayette, Oregon, US. Almost Eden , Merryville, Louisiana, US.
Europe
(Widely available)
References