Crataegus pruinosa

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Crataegus pruinosa
Frosted Thorn (2981720487).jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Genus: Crataegus
Section: Coccineae
Series: Pruinosae
Species: C. pruinosa
Binomial name
Crataegus pruinosa

Crataegus pruinosa is a species of hawthorn known by the common name frosted hawthorn. It is native to a wide area of the eastern United States and southern Canada, and is sometimes considered to be several species, rather than just one.


The following varieties are recognized in the Flora of North America (2015):[2]

  • C. pruinosa var. pruinosa, synonyms:
    • C. bracteata Sarg.
    • C. tumida Sarg.
  • C. pruinosa var. dissona (Sarg.) Eggl., synonyms:
    • C. dissona Sarg.
    • C. brachypoda Sarg.
    • C. disjuncta Sarg.
    • C. rigida Sarg.
  • C. pruinosa var. parvula (Sarg.) J.B.Phipps, synonyms:
    • C. parvula Sarg.
  • C. pruinosa var. rugosa (Ashe) Kruschke, synonyms:
    • C. rugosa Ashe
    • C. leiophylla Sarg.
    • C. mackenziei Sarg. ex Mackenzie
    • C. rubicundula Sarg.
    • C. seclusa Sarg.
    • C. seducta Sarg.
  • C. pruinosa var. virella (Ashe) Kruschke, synonyms:
    • C. virella Ashe
  • C. pruinosa var. magnifolia (Sarg.) J.B.Phipps, synonyms:
    • C. magnifolia Sarg.


  1. ^ Phipps, J.B.; Robertson, K.R.; Smith, P.G.; Rohrer, J.R. (1990). "A checklist of the subfamily Maloideae (Rosaceae)". Canadian Journal of Botany. 68 (10): 2209–69. doi:10.1139/b90-288.
  2. ^ Phipps, J.B. (2015), "Crataegus pruinosa (H. L. Wendland) K.Koch Hort. Dendrol. 168 1853", 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, Magnoliophyta: Picramniaceae to Rosaceae, Flora of North America North of Mexico, 9, New York, Oxford: Oxford University Press, pp. 574–577

External links[edit]

  • Phipps, J.B.; O'Kennon, R.J.; Lance, R.W. (2003). Hawthorns and medlars. Cambridge, U.K.: Royal Horticultural Society. ISBN 0881925918.