Pterocarya is a small genus of about 10 species, native in western and eastern Asia. Several species and hybrids are cultivated for ornament. Two taxa have been observed as escapes from cultivation in Belgium.
- Leaf axis not winged between the leaflets === 1. Pterocarya fraxinifolia
- Leaf axis conspicuously winged between the leaflets (especially in coppice-shoots) === 2. P. x rehderiana
Literature
Kozlowski G., Bétrisey S. & Song Y.-G. (2018) Wingnuts (Pterocacya) & walnut family : Relict trees : Linking the past, present and future. Natural History Museum Fribourg: 127 pp.
Wijnands D.O. (1989) Pterocarya. In: Walters S.M. & al. (eds.), The European Garden Flora, vol. 3. Cambridge University Press, Cambridge: 20.
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