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Pyrus calleryana, also known as the Callery pear or Bradford pear, is a species of pear tree native to China and Vietnam, [2] in the family Rosaceae. It is most commonly known for its cultivar 'Bradford' and its offensive odor, widely planted throughout the United States and increasingly regarded as an invasive species .
a hybrid of the Chinese "sand pear", P. pyrifolia and probably 'Bartlett'. Hardy in Zones 4–9. eating, canning, baking: 170–190 Kikusui [20] Kikisui: Pyrus pyrifolia. Not suitable for shipping. eating: Kosui [141] [167] (幸水) Russet apple pear National Institute of Fruit Tree Science, Japan: c. 1959
The pear tree and shrub are a species of genus Pyrus / ˈ p aɪ r ə s /, in the family Rosaceae, bearing the pomaceous fruit of the same name. Several species of pears are valued for their edible fruit and juices, while others are cultivated as trees. The tree is medium-sized and native to coastal and mildly temperate regions of Europe, North ...
Pyrus communis, the common pear, is a species of pear native to central and eastern Europe, and western Asia. [ 3 ] It is one of the most important fruits of temperate regions, being the species from which most orchard pear cultivars grown in Europe , North America , and Australia have been developed.
American Forests, for example, uses a formula to calculate Big Tree Points as part of their Big Tree Program [3] that awards a tree 1 point for each foot of height, 1 point for each inch (2.54 cm) of girth, and ¼ point for each foot of crown spread. The tree whose point total is the highest for that species is crowned as the champion in their ...
It is widely grown as an ornamental tree, almost always as a pendulous (or "weeping") cultivar, and is called by various common names, including willow-leaved pear, [2] weeping pear, and similar. The tree is deciduous and of comparatively small stature, rarely reaching 10–12 meters in height. The crown is rounded.
Other researchers have developed models of maximum height for Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) trees that yield similar estimates of 109–138 meters (357–452 feet), [47] a range that includes the height of the tallest reliably-measured historical (dead) specimen, a 126-meter tree.
Pyrus pyraster is a deciduous plant reaching 3–4 metres (9.8–13.1 ft) in height as medium-sized shrub and 15–20 metres (49–66 ft) as a tree. [2] Unlike the cultivated form, the branches have thorns. [2] The leaves are ovate with serrated margins. The flowers have white petals. The stamens are equal to the length of styles. [2]