Crataegus crus-galli

Crataegus crus-galli is a species of hawthorn known by the common names cockspur hawthorn and cockspur thorn. It is native to eastern North America from Ontario to Texas to Florida, and it is widely used in horticulture.[2][3] It is thought to be the parent, along with Crataegus succulenta, of the tetraploid species Crataegus persimilis.

Crataegus crus-galli
A cultivated form
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rosaceae
Genus: Crataegus
Section: Crataegus sect. Coccineae
Series: Crataegus ser. Crus-galli
Species:
C. crus-galli
Binomial name
Crataegus crus-galli
Synonyms[1]
  • Crataegus acutifolia Sarg.
  • Crataegus albanthera Sarg.
  • Crataegus arborea Beadle
  • Crataegus barrettiana Sarg.
  • Crataegus calophylla Sarg.
  • Crataegus candens Sarg.
  • Crataegus cherokeensis Sarg.
  • Crataegus consueta Sarg.
  • Crataegus hamata E.J.Palmer
  • Crataegus hannibalensis E.J.Palmer
  • Crataegus infera Sarg.
  • Crataegus leptophylla Sarg.
  • Crataegus limnophylla Sarg.
  • Crataegus ludovicensis Sarg.
  • Crataegus monosperma Sarg.
  • Crataegus pachyphylla Sarg.
  • Crataegus paradoxa Sarg.
  • Crataegus parkiae Sarg.
  • Crataegus permera Sarg.
  • Crataegus phaneroneura Sarg.
  • Crataegus polyclada Sarg.
  • Crataegus pyracanthoidesBeadle
  • Crataegus regalis Beadle
  • Crataegus rubrifolia Sarg.
  • Crataegus rudis Sarg.
  • Crataegus severa Sarg.
  • Crataegus strongylophylla Sarg.
  • Crataegus tantula Sarg.
  • Crataegus tardiflora Sarg.
  • Crataegus tenax Ashe
  • Crataegus tenuispina Sarg.
  • Crataegus truncata Sarg.

Description

This is a small tree growing up to about 10 meters tall and 8 meters wide, rounded in form when young and spreading and flattening as it matures. The leaves are 5 to 6 centimeters long, glossy dark green in color and turning gold to red in the fall. The flowers are white and have a scent generally considered unpleasant. The fruits are small pomes that vary in colour, usually a shade of red.[3] Most wild varieties of the tree are heavily armed in sharp thorns several centimeters long.

Cultivation

This species is a popular ornamental tree, especially var. inermis, which lacks thorns. Many other wild forms would be very suitable for landscaping if better known, and yellow-fruited forms exist.[3]

Images
  • C. crus-galli var. pyracanthifolia
  • C. crus-galli var. pyracanthifolia
  • Thorns on 2 to 3-year old branches
  • Branched thorns on the trunk

See also

References
  1. Phipps, J.B. (2015), "Crataegus crus-galli Linnaeus", 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.), Flora of North America North of Mexico, Volume 9: Magnoliophyta: Picramniaceae to Rosaceae, New York, Oxford: Oxford University Press, pp. 538–619
  2. USDA Plants
  3. Phipps, J.B.; O’Kennon, R.J.; Lance, R.W. (2003). Hawthorns and medlars. Cambridge, U.K.: Royal Horticultural Society. ISBN 0-88192-591-8.
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