EcoFlora - Crataegus

Crataegus
Family: Rosaceae Leslie Landrum	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.
Species within checklist: Montana State University - 1. WLD 438 - Required Plants to Know \|\| << 51 - 100 taxa >> Crataegus arkansana Map not Available Crataegus arnoldiana Map not Available Crataegus arrogans Map not Available Crataegus ascendens Map not Available Crataegus ashei Map not Available Crataegus aspera Map not Available Crataegus assurgens Map not Available Crataegus ater Media not available Map not Available Crataegus atrorubens Map not Available Crataegus atrovirens Map not Available Crataegus attrita Map not Available Crataegus aulica Map not Available Crataegus aurescens Map not Available Crataegus austera Map not Available Crataegus austromontana Map not Available Crataegus azarolus Map not Available Crataegus balkwillii Map not Available Crataegus baroussana Map not Available Crataegus barrettiana Map not Available Crataegus bartoniana Map not Available Crataegus bartramiana Map not Available Crataegus basilica Map not Available Crataegus baxteri Map not Available Crataegus beadlei Map not Available Crataegus beata Map not Available Crataegus beckwithiae Media not available Map not Available Crataegus bedfordensis Map not Available Crataegus bellatula Map not Available Crataegus berberifolia Map not Available Crataegus biltmoreana Map not Available Crataegus bisulcata Map not Available Crataegus blairensis Map not Available Crataegus blanda Map not Available Crataegus blothra Map not Available Crataegus bona Map not Available Crataegus boyntonii Map not Available Crataegus brachyacantha Map not Available Crataegus brachyphylla Map not Available Crataegus brainerdii Map not Available Crataegus brazoria Map not Available Crataegus brevispina Map not Available Crataegus brittonii Map not Available Crataegus brumalis Map not Available Crataegus brunetiana Map not Available Crataegus buckleyi Map not Available Crataegus bullatus Media not available Map not Available Crataegus burkeana Map not Available Crataegus bushii Map not Available Crataegus caesa Media not available Map not Available Crataegus caesariata Map not Available