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Crataegus
Family: Rosaceae
Crataegus image
  • Gleason & Cronquist
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Vascular plants of NE US and adjacent Canada
Fls perfect, regular, in compound or nearly simple cymes, or rarely solitary; pet 5, white, rarely pink or red; sep 5, entire or glandular-serrate; stamens 5-25, arranged alternately in 1-5 rows; ovary inferior or free at the tip, the 1-5 carpels with as many persistent free styles; fr a small, globose to ovoid or pyriform pome, usually red or reddish, sometimes yellow, greenish, or blue-black, with 1-5 bony, usually 1-seeded nutlets; small trees or shrubs with usually thorny and often flexuous branches; lvs simple, deciduous, toothed and often also lobed, those of the flowering branches (the floral lvs) often unlike those of strictly vegetative branches; x=16, 17. Our spp. all fl in the spring and fr in the fall. 100+, N. Temp. and Andes. The spp. of Crataegus characteristically occur in disturbed sites or seral communities, such as pastures, edges of the forest, open second-growth woods, and thickets along streams. It has not been considered necessary to repeat these comments on the habitat for each species in the following text. The taxonomy of Crataegus is complicated by hybridization, polyploidy, aneuploidy, and apomixis. Several hundred species have been described from our range alone. A proper understanding of the group will require a thorough biosystematic study; the treatment here presented is rough and more than ordinarily tentative. Some names suspected or believed to apply to hybrids or plants of hybrid origin are listed before the key to accepted species. C. ءnomala Sarg. = C. coccinea נmollis C. ءpiomorpha Sarg. = C. coccinea נflabellata C. ءrdua Sarg. = C. punctata נsucculenta C. ءulica Sarg. = C. coccinea נdilatata C. أelsa Sarg. = C. punctata נsucculenta C. أhadsfordiana Sarg. = C. pruinosa נsucculenta C. أollicola Ashe = C. crus-galli נpunctata C. أorusca Sarg. = C. coccinea נmollis C. ؤanielsii E. J. Palmer = C. crus-galli נpunctata C. ؤensiflora Sarg. = C. flabellata נrotundifolia C. ؤesueta Sarg. = C. brainerdii נpunctata C. ؤisperma Ashe = C. crus-galli נpunctata C. ؤivida Sarg. = C. brainerdii נsucculenta C. ؤurobrivensis Sarg. = C. pruinosa נpunctata C. إllwangeriana Sarg. = C. coccinea נmollis [Continued]

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within inventory project: SERNEC State Inventories || << 1 - 50 taxa >>
Crataegus aemula
Image of Crataegus aemula
Crataegus aestivalis
Image of Crataegus aestivalis
Crataegus anamesa
Image of Crataegus anamesa
Crataegus ancisa
Image of Crataegus ancisa
Crataegus annosa
Image of Crataegus annosa
Crataegus aprica
Image of Crataegus aprica
Crataegus arborea
Image of Crataegus arborea
Crataegus arcana
Image of Crataegus arcana
Crataegus arrogans
Image of Crataegus arrogans
Crataegus austromontana
Image of Crataegus austromontana
Crataegus beadlei
Image of Crataegus beadlei
Crataegus berberifolia
Image of Crataegus berberifolia
Crataegus brachyacantha
Image of Crataegus brachyacantha
Crataegus brainerdii
Image of Crataegus brainerdii
Crataegus brazoria
Image of Crataegus brazoria
Crataegus calpodendron
Image of Crataegus calpodendron
Crataegus chrysocarpa
Image of Crataegus chrysocarpa
Crataegus cibaria
Image of Crataegus cibaria
Crataegus coccinea
Image of Crataegus coccinea
Crataegus collina
Image of Crataegus collina
Crataegus compacta
Image of Crataegus compacta
Crataegus condigna
Image of Crataegus condigna
Crataegus contrita
Image of Crataegus contrita
Crataegus crocina
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Crataegus crus-galli
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Crataegus dallasiana
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Crataegus denaria
Image of Crataegus denaria
Crataegus dispar
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Crataegus dissona
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Crataegus dodgei
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Crataegus edura
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Crataegus engelmannii
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Crataegus erythrocarpa
Image of Crataegus erythrocarpa
Crataegus exilis
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Crataegus extraria
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Crataegus flabellata
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Crataegus flava
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Crataegus fragilis
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not available
Crataegus furtiva
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Crataegus gattingeri
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Crataegus greggiana
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Crataegus harbisonii
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Crataegus helvina
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not available
Crataegus holmesiana
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Crataegus ignave
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Crataegus impar
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Crataegus inanis
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Crataegus insidiosa
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Crataegus integra
Image of Crataegus integra
Crataegus intricata
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