? Callery Pear
Callery Pear fruit in winter
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Rosales Family: Rosaceae Genus: Pyrus Species: P. calleryana
Binomial name
Pyrus calleryana Decne.

The Callery Pear (Pyrus calleryana) is a species of pear native to China. It is a deciduous tree growing to 15-20 m tall, with a conic to rounded crown, and often thorny branches. The leaves are oval, 4-7 cm long, glossy dark green above, slightly paler below. The flowers are produced in early spring before the leaves expand fully, and are white, with five petals, and about 2-3 cm diameter; they have a sickly-sweet smell that some have likened to semen, decaying crab meat, or jasmine and dog vomit. The fruit is about 2 cm diameter, hard, almost woody until softened by frost, after which it is readily taken by birds, which disperse the seeds in their droppings. In summer, the foliage is dark green and very smooth, and in autumn the leaves commonly turn brilliant colours, anything from yellow and orange to more common red, pink, purple, and bronze. Sometimes, several of these colours may be present on an individual leaf. However, the colour often occurs very late in fall, and the leaves may killed by a frost before full colour can develop. Bradford pear, fruit in winter Image taken by me, released under GFDL Pollinator 05:35, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Classes Magnoliopsida- Dicots Liliopsida- Monocots The flowering plants (also called angiosperms) are a major group of land plants. ... Magnoliopsida is the botanical name for a class: this name is formed by replacing the termination -aceae in the name Magnoliaceae by the termination -opsida (Art 16 of the ICBN). ... Families Barbeyaceae Cannabaceae (hemp family) Dirachmaceae Elaeagnaceae Moraceae (mulberry family) Rosaceae (rose family) Rhamnaceae (buckthorn family) Ulmaceae (elm family) Urticaceae (nettle family) For the Philippine municipality, see Rosales, Pangasinan. ... Subfamilies Rosoideae Spiraeoideae Maloideae Amygdaloideae or Prunoideae The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera. ... Species About 30 species, including: Pyrus amygdaliformis Pyrus austriaca Pyrus balansae Pyrus betulifolia Pyrus bourgaeana Pyrus bretschneideri Pyrus calleryana Pyrus caucasica Pyrus communis Pyrus cordata Pyrus cossonii Pyrus elaeagrifolia Pyrus fauriei Pyrus kawakamii Pyrus korshinskyi Pyrus lindleyi Pyrus nivalis Pyrus pashia Pyrus persica Pyrus phaeocarpa Pyrus pyraster Pyrus pyrifolia Pyrus... In biology, binomial nomenclature is the formal method of naming species. ... Species Pyrus calleryana P. pyrifolia et al Pears are trees of the genus Pyrus and the edible fruit of that tree. ... Deciduous means temporary or tending to fall off (deriving from the Latin word decidere, to fall off). ... The coniferous Coast Redwood, the tallest tree species on earth. ... Raised thorns on the stem of the wait-a-bit climber Thorns on rose stems A spine is a rigid, pointed surface protuberance or needle-like structure on an animal, shell, or plant, presumably serving as a defense against attack by predators. ... The leaves of a Beech tree A leaf with laminar structure and pinnate venation In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... Clivia miniata right hereflowers. ... JUNIOR Odor receptors on the antennae of a Luna moth An odor (American English) or odour (Commonwealth English) is the object of perception of the sense of olfaction. ... Human semen collected on a glass surface during ejaculation process. ... Sections The term crab is often applied to several different groups of short (nose to tail) decapod crustaceans with thick exoskeletons, but only members of the Brachyura are true crabs. ... Species About 200 species, including: Jasminum angulare Jasminum angustifolium Jasminum auriculatum Jasminum azoricum Jasminum beesianum Jasminum dichotomum– Gold Coast Jasmine Jasminum floridum Jasminum fluminense– African Jasmine Jasminum fruticans Jasminum humile– Yellow Jasmine Jasminum grandiflorum Jasminum mesnyi– Primrose Jasmine Jasminum multiflorum– Star Jasmine Jasminum nitidum– Shining Jasmine Jasminum nudiflorum– Winter Jasmine... Vomiting (or emesis) is the forceful expulsion of the contents of ones stomach through the mouth. ... Fruit stall in Barcelona, Catalonia. ... Orders Many - see section below. ... A ripe red jalapeno cut open to show the seeds For other uses, see Seed (disambiguation). ... For other senses of this word, see Summer (disambiguation). ... This article is about the leaf, a plant organ. ... Fall redirects here. ... It has been suggested that hoar frost be merged into this article or section. ...

Cultivation

Bradford pear in autumn colour

It is widely planted throughout North America as an ornamental tree. The symmetry of several cultivars lends to their use in somewhat formal settings, such as office parks or industrial parks. It is commonly planted for its decorative value, but its hard little fruits are taken by birds. Its beautiful white blossoms can be seen in early spring along the boulevards of many eastern U.S. towns. At the latitude of Pittsburgh, PA the trees often remain green until mid-November, and in warm autumns, the colours are often a brilliant end to the fall colour season, while in a cold year they may get frozen off before colouring. In the South, they tend to be among the more reliable colouring trees. Download high resolution version (2089x1728, 3488 KB)Bradford pear, fall color Image copyleft: Image taken by me, released under GFDL, Pollinator 03:02, Dec 24, 2004 (UTC) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Download high resolution version (2089x1728, 3488 KB)Bradford pear, fall color Image copyleft: Image taken by me, released under GFDL, Pollinator 03:02, Dec 24, 2004 (UTC) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... World map showing North America A satellite composite image of North America. ... Square with symmetry group D4 Symmetry is a characteristic of geometrical shapes, equations, and other objects; we say that such an object is symmetric with respect to a given operation if this operation, when applied to the object, does not appear to change it. ... This Osteospermum Pink Whirls is a successful cultivar. ... An industrial park is an area of land set aside for industrial development. ... An industrial park is an area of land set aside for industrial development. ... Fruit stall in Barcelona, Catalonia. ... Orders Many - see section below. ... Blossom is a term given to the flowers of stone fruit trees (Genus Prunus) and of some other plants with a similar appearance that flower profusely but for a short period of time. ... Spring is one of the four seasons of temperate zones. ... Motto: (traditional) In God We Trust (official, 1956–present) Anthem: The Star-Spangled Banner Capital Washington, D.C. Largest city New York City Official language(s) None at the federal level; English de facto Government Federal Republic  - President George W. Bush (R)  - Vice President Dick Cheney (R) Independence - Declared - Recognized... City nickname: The Steel City Location in the state of Pennsylvania Founded 1758 Mayor Tom Murphy (Dem) Area  - Total  - Water 151. ... Southern United StatesThe states shown in dark red are usually included in the South, while all or portions of the striped states may or may not be considered part of the Southern United States. ...

The Callery Pear is proving to be an invasive species in some areas of North America, pushing out native American plants and trees. Self-sown plants often differ from the selected cultivars in less regular shape, and also in frequently being densely thorny. The term invasive species refers to a subset of those species defined as introduced species or non-indigenous species. ...

Bradford Pear in flower, Hemingway, South Carolina

There are several cultivars in commerce, including 'Aristocrat', 'Autumn Blaze', 'Bradford' (Bradford Pear, the most commonly planted cultivar), 'Capital', 'Cleveland Select', 'Fauriei', 'Redspire', and 'Whitehouse'. Bradford pear in bloom Image taken by me, released under GFDL Pollinator 05:34, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Bradford pear in bloom Image taken by me, released under GFDL Pollinator 05:34, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Hemingway is a town located in Williamsburg County, South Carolina. ...

The neat dense upward growth of 'Bradford', which makes it desirable in cramped urban spaces, also results in a multitude of narrow, weak forks, unless corrected by selective pruning at an early stage. These weak crotches make the Bradford Pear very susceptible to storm damage where snowfall is heavy or when ice storms occur, or during the high winds of severe thunderstorms. Because of this, and the relatively short lifespan that results (typically less than 25 years), many groups have discouraged their use in landscaping in favour of other stronger trees including other Callery Pear cultivars like 'Cleveland Select', but also more locally native tree species. Another widely discussed draw back is the unpleasant smell, which many suggest strongly resembles that of human semen[1]. An urban area is a term used to define an area where there is an increased density of human-created structures in comparison to the areas surrounding it. ... In microeconomics, pruning taken as a metaphor from gardening, refers to the removal of excess items from a budget. ... A rolling thundercloud over Enschede, Netherlands A storm is any disturbed state of a planets atmosphere, especially affecting its surface, and strongly implying severe weather. ... For other uses, see Snow (disambiguation). ... Ice storm could refer to: A type of winter storm characterized by freezing rain. ... Wind is the roughly horizontal movement of air (as opposed to an air current) caused by uneven heating of the Earths surface. ... This article or section does not cite its references or sources. ... Lifespan is the maximum number of years a species can survive, defined by the oldest documented age of an individual member. ... Landscaping can refer to more than one subject: Real estate on large scale, see Landscape architecture Gardening on a large or small scale, see Landscape gardening Artwork, see Landscape painting Maintenance, see Landscape maintenance This is a disambiguation page — a navigational aid which lists other pages that might otherwise share... Human semen collected on a glass surface during ejaculation process. ...

External links

• Plant Invaders of Mid-Atlantic Natural Areas
• Pyrus calleryana images at bioimages.vanderbilt.edu