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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.
Unlike ordinary hawthorn trees, it flowers twice a year (hence the name "biflora"), the first time in winter and the second time in spring. The trees in the Glastonbury area have been propagated by grafting since ancient times. [1] The tree is also widely called the holy thorn, though this term strictly speaking refers to the original ...
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 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.
Crataegus rivularis is a species of hawthorn known by the common name river hawthorn. It is native to the intermontane region of the northwestern United States, situated between the coastal ranges and the Rocky Mountains. [2] C. rivularis is one of the black-fruited hawthorn species.
Crataegus chrysocarpa is a species of hawthorn that is native to much of the continental United States and Canada.Common names fireberry hawthorn and goldenberry hawthorn, as well as the scientific name all refer to the colour of the unripe fruit, although the mature fruit is red [2] and in var. vernonensis is "deep claret-colored … nearly black when over-ripe".
Crataegus macrosperma, the bigfruit hawthorn is a species of hawthorn native to most of the eastern United States and adjacent Canada, though uncommon at lower altitudes in the south. It is sometimes misidentified as C. flabellata . [ 2 ]
Crataegus erythropoda is a hawthorn native to the southern Rocky Mountains in the United States. The leaves are conspicuously shiny above and fruit ("haws") are dark purplish red. [ 2 ] It is seldom cultivated, but at one time was listed in the nursery trade under the common name "Chocolate Haw". [ 3 ]