homotypic synonyms:
Malus angustifolia species (Aiton) Michx.;
protologue: Hort. Kew. 2: 176 (1789) [url checked 20190320]
2 857461 Pyrus angustifolia Aiton
J.C. Loudon, Arbor. Frutic. Brit., ed. 2, vol. 6 (Plates): p. 177 (1844)
Malus angustifolia species (Aiton) Michx.;
protologue: Hort. Kew. 2: 176 (1789) [url checked 20190320]
2 857461 Pyrus angustifolia AitonJ.C. Loudon, Arbor. Frutic. Brit., ed. 2, vol. 6 (Plates): p. 177 (1844)