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Crataegus crus-galli

Family: rosaceae
Common name(s): Cockspur Hawthorn
Hardiness ratings: USDA zone 3~4 - 7

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 crus-galli

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-7) (1 photo)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (zone 4) (7 photos)
• Garden.org - Community-assembled plant profile (12 photos)
• Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (4 photos)
• Kansas Wildflowers & Grasses - Plant portrait with botanical details and description (10 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (28 photos)
• Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 3-7) (4 photos). Also a page for 'Cruzam' CRUSADER.
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3b-7a) (6 photos)
• Ontario Rock Garden Society - Germination information

Crataegus crus-galli var. crus-galli

Common name(s): Cockspur Hawthorn

Links

• Carolina Nature - Illustrated woody plant profile, with notes on range and identification. (8 photos)

Crataegus crus-galli var. inermis

Common name(s): Cockspur Thorn, Hawthorn, Thornless Cockspur Hawthorn
Hardiness ratings: USDA zone 3 - 7

Links

• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3-7a) (3 photos)

Crataegus crus-galli thornless

Common name(s): cockspur thorn
Hardiness ratings: USDA zone 3 - 7

Links

• Missouri Botanical Garden: Crataegus crus-galli thornless form - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 3-7) (3 photos)