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Crataegus crus-galli is a species of hawthorn known by the common names cockspur hawthorn and cockspur thorn. It is native to North America and is widely used in horticulture . It produces edible fruit.
The leaves are 5–10 cm (2.0–3.9 in) in length and often drop in late summer due to defoliation by leaf diseases. The tree seems to suffer little from the early loss of its leaves. Among the earliest in the genus to bloom, downy hawthorn also has earliest ripening fruit, which decorate the defoliated tree in late summer and early fall.
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.
The fruit is edible when cooked, and can be used to make jam. [citation needed] Indian hawthorn is a mainstay horticultural specimen in southern United States. It is often found in commercial as well as in private landscapes. Often it is trimmed into small compact hedges or balls for foundation plants.
Fire blight, also written fireblight, is a contagious disease affecting apples, pears, and some other members of the family Rosaceae. It is a serious concern to apple and pear producers. Under optimal conditions, it can destroy an entire orchard in a single growing season.
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Crataegus azarolus is a species of hawthorn known by the common names azarole, azerole (from Arabic: الزُّعرُورَة, romanized: az-zu'rūra) and Mediterranean medlar. It is native to the Mediterranean Basin and is a common plant there, growing on sites comparable to those the European common hawthorn grows on.
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.