NEON Biorepository Data Portal

Crataegus
Family: Rosaceae Tony Frates	Gleason & Cronquist Resources 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.
<< 1 - 50 taxa >> Crataegus aemula Images not available Map not Available Crataegus aestivalis Images not available Map not Available Crataegus alabamensis Images not available Map not Available Crataegus alleghaniensis Images not available Map not Available Crataegus alma Images not available Map not Available Crataegus ambitiosa Images not available Map not Available Crataegus anamesa Images not available Map not Available Crataegus ancisa Images not available Map not Available Crataegus annosa Images not available Map not Available Crataegus anomala Images not available Map not Available Crataegus apiomorpha Images not available Map not Available Crataegus arborea Images not available Map not Available Crataegus arcana Images not available Map not Available Crataegus arrogans Images not available Map not Available Crataegus ater Images not available Map not Available Crataegus austromontana Images not available Map not Available Crataegus beadlei Images not available Map not Available Crataegus beata Images not available Map not Available Crataegus berberifolia Images not available Map not Available Crataegus bona Images not available Map not Available Crataegus brachyacantha Images not available Map not Available Crataegus brainerdii Images not available Map not Available Crataegus brazoria Images not available Map not Available Crataegus brevipes Images not available Map not Available Crataegus calpodendron Images not available Map not Available Crataegus canescens Images not available Map not Available Crataegus carrollensis Images not available Map not Available Crataegus chrysocarpa Images not available Map not Available Crataegus coccinea Images not available Map not Available Crataegus coccinioides Images not available Map not Available Crataegus coleae Images not available Map not Available Crataegus compacta Images not available Map not Available Crataegus compta Images not available Map not Available Crataegus condigna Images not available Map not Available Crataegus consanguinea Images not available Map not Available Crataegus contrita Images not available Map not Available Crataegus corusca Images not available Map not Available Crataegus crus-galli Map not Available Crataegus dallasiana Images not available Map not Available Crataegus desueta Images not available Map not Available Crataegus dilatata Images not available Map not Available Crataegus dispar Images not available Map not Available Crataegus disperma Images not available Map not Available Crataegus dispessa Images not available Map not Available Crataegus dissona Images not available Map not Available Crataegus distincta Images not available Map not Available Crataegus dodgei Images not available Map not Available Crataegus douglasii Images not available Map not Available Crataegus engelmannii Images not available Map not Available Crataegus erythrocarpa Images not available Map not Available