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Crataegus douglasii is a compact erect bushy shrub growing to 8–9 metres (26–30 feet) tall with a trunk of up to 10 centimetres (4 inches) thick. [4] It is covered in fan-shaped green leaves about 2.5–5 cm (1–2 in) long [4] with teeth along the distal margin. Thorns along the branches are 1–2.5 cm long. [4]
Many have tried to grow the Glastonbury thorn from seed and direct cuttings, but in the later part of the 20th century all attempts reverted to the normal hawthorn type, flowering only in spring. [15] This tree has been widely propagated by grafting or cuttings, with the cultivar name 'Biflora' or 'Praecox'.
Crataegus (/ k r ə ˈ t iː ɡ ə s /), [2] commonly called hawthorn, quickthorn, [3] thornapple, [4] May-tree, [5] whitethorn, [5] Mayflower or hawberry, is a genus of several hundred species of shrubs and trees in the family Rosaceae, [6] native to temperate regions of the Northern Hemisphere in Europe, Asia, North Africa and North America.
Crataegus monogyna, known as common hawthorn, whitethorn, one-seed hawthorn, or single-seeded hawthorn, is a species of flowering plant in the rose family, Rosaceae. It grows to about 10 metres (33 feet) tall, producing hermaphrodite flowers in late spring. The berry-like pomes (known as haws) contain a stone-encased seed.
Crataegus pennsylvanica, known as the Pennsylvania thorn, [2] is a species of hawthorn native to Delaware, New York, North Carolina, Ontario, Ohio, and Pennsylvania, [2] that grows to about 8 m in height. [2] The mature trees have few thorns. [2]
Crataegus viridis, the green hawthorn [2] or southern thorn, [3] is a species of hawthorn that is native to the southeastern United States. The tree tends to grow to be 5–15 meters tall. Forms vary considerably, and many desirable ornamental forms could be selected from the wild. The cultivar 'Winter King' is a well-known selection.
Crataegus succulenta is a species of hawthorn known by the common names fleshy hawthorn, [4] succulent hawthorn, [4] and round-fruited cockspurthorn. [5] It is "the most wide-ranging hawthorn in North America", [3] native to much of southern Canada, and the United States as far south as Arizona, New Mexico, Kansas, Missouri, North Carolina, and Tennessee. [3]
Crataegus mollis, known as downy hawthorn or red hawthorn, is a species of plant that occurs in eastern North America from southeastern North Dakota east to Nova Scotia and southwest to eastern Texas. The range of this species is from southern Ontario and Michigan to eastern North Dakota and southward to Denison, Texas, and Arizona. [3]