Crataegus wattiana, the Altai hawthorn,[2] is an Asian species of hawthorn. The original description states that it has yellow fruit with five stones (pyrenes).[3]Crataegus wattiana var. wattiana has become naturalized in Seattle, in the U.S. state of Washington.[2][4]
^ abPhipps, J.B. (2015), "Crataegus Linnaeus sect. Sanguineae (Zabel ex Rehder) C. K. Schneider, Ill. Handb. Laubholzk. 1:771. 1906", 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, pp. 514–5
^Phipps, J.B. (2015), "Crataegus wattiana Hemsley & Lace, J. Linn. Soc., Bot. 28: 323, plate 40. 1891", 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