Species of hawthorn
Crataegus putnamiana is a rare species of North American hawthorn derived from hybridization between a species in Crataegus series Coccineae and a species in series Dilatatae.[1]
References
- ^ Phipps, J.B. (2015), "Crataegus Linnaeus (sect. Coccineae) ser. Coccineae (Loudon) Rehder, Man. Cult. Trees ed. 2 362 1940", in L. Brouillet; K. Gandhi; C.L. Howard; H. Jeude; R.W. Kiger; J.B. Phipps; A.C. Pryor; H.H. Schmidt; J.L. Strother; J.L. Zarucchi (eds.), Magnoliophyta: Picramniaceae to Rosaceae, Flora of North America North of Mexico, vol. 9, New York, Oxford: Oxford University Press, p. 558
