Kingdom:
Phylum:
Angiosperms
Order:
Rosales
Family:
Genus:
Species:
opaca
ID:
1011181

Status:
valid

Authors:
Hook. & Arn.

Source:
rjp

Year:
1835

Citation Micro:
Compan. Bot. Mag. 1: 25 (1835)

WFO Identifier:
wfo-0001010519



Common Names

  • Opaque Hawthorn
  • May Hawthorn
  • White Thorn


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Description

Crataegus opaca (also called Opaque Hawthorn, among many other common names) is a small deciduous tree or shrub with white flowers and small, red fruits. It is native to the eastern United States and is found in open woodlands, thickets, and rocky hillsides.

Uses & Benefits

Crataegus opaca is a popular ornamental plant, often used in gardens and parks. It is also used as a medicinal plant to treat various ailments, such as fever, colds, and digestive problems.

Flower, Seeds and Seedlings

The flowers of Crataegus opaca are white and have five petals. The seeds are small and black. The seedlings are small and have a single stem.

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Cultivation and Propagation

Crataegus opaca can be propagated by seed or by suckers. Sow the seed in a cold frame in the autumn. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Suckers can be removed in the autumn or spring. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.

Where to Find Crataegus opaca

Crataegus opaca is native to the United States and can be found in the states of Illinois, Indiana, and Iowa.

Species in the Crataegus genus

Crataegus lassa, Crataegus kyrtostyla, Crataegus persimilis, Crataegus ariifolia, Crataegus pruinosa, Crataegus suborbiculata, Crataegus baroussana, Crataegus confinis, Crataegus conjungens, Crataegus drymopila, Crataegus elliptica, Crataegus fruticosa, Crataegus gaylussacia, Crataegus miranda, Crataegus nelsonii, Crataegus okanaganensis, Crataegus okennonii, Crataegus parryana, Crataegus peregrina, Crataegus phippsii, Crataegus pubescens, Crataegus roribacca, Crataegus rosei, Crataegus sejuncta, Crataegus spissiflora, Crataegus vivida, Crataegus korolkowii, Crataegus chlorocarpa, Crataegus atrofusca, Crataegus isfajramensis, Crataegus ferganensis, Crataegus hissarica, Crataegus knorringiana, Crataegus necopinata, Crataegus pamiroalaica, Crataegus poloniensis, Crataegus pseudosanguinea, Crataegus theodori, Crataegus ambigua, Crataegus azarolus, Crataegus chungtienensis, Crataegus dikmensis, Crataegus dzhairensis, Crataegus granatensis, Crataegus heldreichii, Crataegus heterophylloides, Crataegus hupehensis, Crataegus kansuensis, Crataegus karadaghensis, Crataegus klokovii,

Species in the Rosaceae family

Acaena macrocephala, Acaena antarctica, Acaena argentea, Acaena boliviana, Acaena buchananii, Acaena echinata, Acaena agnipila, Acaena cylindristachya, Acaena confertissima, Acaena eupatoria, Acaena integerrima, Acaena leptacantha, Acaena ovina, Acaena magellanica, Acaena masafuerana, Acaena patagonica, Acaena tenera, Acaena platyacantha, Acaena pumila, Acaena splendens, Acaena stricta, Acaena stangii, Acaena trifida, Acaena pallida, Acaena caespitosa, Acaena saccaticupula, Acaena subincisa, Acaena hirsutula, Acaena fissistipula, Acaena glabra, Acaena tesca, Acaena juvenca, Acaena emittens, Acaena dumicola, Acaena profundeincisa, Acaena minor, Acaena alpina, Acaena montana, Acaena myriophylla, Acaena poeppigiana, Acaena anserovina, Acaena sericea, Acaena latebrosa, Acaena sarmentosa, Acaena elongata, Acaena exigua, Acaena rorida, Acaena novae-zelandiae, Acaena pinnatifida, Acaena inermis,

References

The Plant List v1.1 record rjp-5014: Based on the initial data import
William Jackson Hooker (1785-1865): Based on occurrence of standard abbreviation 'Hook.' in the authors string.
George Arnott Walker-Arnott (1799-1868): Based on occurrence of standard abbreviation 'Arn.' in the authors string.