Crataegus punctata

Crataegus punctata
A red-anthered form of this variable species
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Genus: Crataegus
Series: Punctatae
(Loudon) Rehder[1]
Species: C. punctata
Binomial name
Crataegus punctata
Jacq.

Crataegus punctata is a species of hawthorn known by the common names dotted hawthorn[2][3] or white haw that is native to most of the eastern United States and eastern Canada. While some sources claim it is the state flower of Missouri,[4] the actual legislation does not identify an exact species.[5] Furthermore, the Missouri Department of Conservation asserts the Crataegus mollis was specifically designated as the state flower.[6]

Flowers of a white-anthered form
Fruit colour varies

Although many North American hawthorns are polyploid and reproduce by apomixis, this species is apparently diploid and sexual, at least throughout Ontario, Canada.[7] The name white haw refers to its distinctive pale (grey) bark, which is particularly noticeable in the winter landscape. The plant is a bush or small tree to about 7 meters in height and very thorny, particularly on the trunk. The flower has 3 to 5 styles and approximately 20 stamens, and the fruit has 3 to 5 nutlets. Anther colour varies from deep purple through red to pink to white, and the mature fruit colour can be deep burgundy, scarlet, yellow, or yellow with a red cheek.

See also

References

  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): 2209–2269.
  2. ↑ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17.
  3. ↑ "Crataegus punctata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 17 January 2016.
  4. ↑ "Missouri State Flower". 50states.com. Retrieved 12 September 2015.
  5. ↑ "Section 10-030 State floral emblem.". mo.gov. Retrieved 12 September 2015.
  6. ↑ anonymous. "Hawthorns". mo.gov. Retrieved 12 September 2015.
  7. ↑ Talent, N., Dickinson, T.A. (2005). Canadian Journal of Botany 83: 1268–1304
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