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Crataegus opaca

Family: rosaceae
Common name(s): Mayhaw, Riverflat Hawthorn
Hardiness ratings: USDA zone 4~7b - 11

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Crataegus opaca

• Arthur Lee Jacobson - Seattle plantsman describes botanical and/or horticultural aspects of this species. (5 photos)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 7b-11)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (9 photos)
• Texas A&M Native Trees - Brief plant profile with horticultural details (zone 4) (4 photos)