Ulmus parvifolia 'Pathfinder' is a Chinese elm cultivar raised by A. M. Townsend of the USDA National Arboretum and registered in 1990.
Description The tree is of modest proportions, rarely reaching > 11 m in height, with a crown slightly less in diameter. The leaves are a glossy yellow-green, and variously described as turning 'grayish red' or 'brilliant red' in autumn. The trunk sports the typical mottled bark.Amer. Nurseryman, 175(4): 42, 1992.Spongberg, S. A. (1991), HortScience 26: 476, 1991.
Pests and diseases The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the elm leaf beetle Xanthogaleruca luteola. However, tolerance of elm yellows in the USA was found to be poor.Sinclair, W. A., Townsend, A. M., Griffiths, H. M., & Whitlow, T. H. (2000). Responses of six Eurasian Ulmus cultivars to a North American elm yellows phytoplasma. Plant disease, Vol. 84, No.12, 1266-1270. American Phytopathological Society, St. Paul, MN
Cultivation 'Pathfinder' is not known to be in cultivation beyond North America.
Accessions North America
Arnold Arboretum, US. Acc. no. 135-98 Chicago Botanic Garden, US.U. parvifolia 'Pathfinder', Chicago Botanic Garden; chicagobotanic.org No accession details.
References
External links http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm Ulmus parvifolia cultivar list.