Studies in Mespilus, Crataegus, and ×crataemespilus (Rosaceae), I. Differentiation of Mespilus and Crataegus, Expansion of ×crataemespilus, With Supplementary Observations on Differences Between the Crataegus and Amelanchier Clades
Phytotaxa- New Zealand
doi 10.11646/phytotaxa.257.3.1