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Crataegus persimilis is a species of hawthorn, known by the common names plumleaf hawthorn and broad-leaved cockspur thorn, native to southern Ontario, Canada, and the US states of New York, Pennsylvania, Ohio, Kentucky, West Virginia, and Virginia. It is widely cultivated, particularly in Europe, as an ornamental.
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.
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 leaves are 2–6 cm (0.79–2.4 in) long and 2–5 cm (0.79–2.0 in) broad, with two or three shallow, forward-pointing lobes on each side of the leaf. The hermaphrodite flowers are produced in corymbs of 6 to 12, each flower with five white or pale pink petals and two or sometimes three styles.
Dasineura crataegi, the hawthorn button-top gall-midge, is a dipteran gall-midge. It causes the hawthorn button-top gall , which develops in the terminal shoots of common hawthorn, Crataegus monogyna Jacq., Midland hawthorn C laevigata (Poir.)
Crataegus texana, the Texas hawthorn, is a member of the family Rosaceae. Typically, it is found in the form of a small tree or a large shrub and blooms in early spring, usually in the months of March and April. [2] Flowers of the Texas Hawthorn are white and usually produce small, one-inch, scarlet fruits that are said to resemble tiny red apples.
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 marshallii is a species of hawthorn known by the common name parsley hawthorn. [4] It is native to the southeastern United States. [5] The leaves of C. marshallii are finely dissected and decorative. The dainty flowers, small red fruit, and beautiful bark add to the ornamental value of this species.