Pyrus calleryana
Decne.
Rosaceae
In spite of their wide geographic distribution, the various species in the genus Pyrus are intercrossable without major incompatibility barriers. Also, the high morphological diversity and the lack of distinguishing characters among the species have been reported. Therefore, the classification of species in this genus is problematic and often confusing, giving different populations designated as different species by some authors. It is likely that, when the genus is reviewed, there will be several changes to the nomenclature[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Pyrus dimorphophylla Makino
Pyrus kawakamii Hayata
Pyrus koehnei C.K.Schneid.
Pyrus mairei H.Lév.
Common Name: Callery Pear
Flowering tree a the Morton Arboretum, USA
Photograph by: Bruce Marlin
General Information
Pyrus calleryana is an unarmed, deciduous tree with a narrow, conical crown, it usually grows 5 - 8 metres tall, sometimes reaching 15 metres tall but sometimes only a shrub[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
,
372- Title
- Flowers of India
- Publication
-
- Author
-
- Website
- http://www.flowersofindia.net/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A wed site of native Indian plants, plus cultivated and naturalized species. It has good quality photos and terse details on more than 3,000 species and cultivars.
,
1212- Title
- New Trees
- Publication
-
- Author
- Grimshaw J.; Bayton R.; Wilks H.
- Publisher
- Kew Publishing; London
- Year
- 2009
- ISBN
- 1842461737
- Description
- Provides comprehensive botanical descriptions and horticultural commentary on over 800 tree species that have been introduced to cultivation in recent decades.
,
1213- Title
- Southern Trees Fact Sheets
- Publication
-
- Author
- Gilman E.F.
- Website
- http://edis.ifas.ufl.edu/department_envhort-trees
- Publisher
- University of Florida, IFAS Extension
- Year
- 0
- ISBN
-
- Description
- A series of fact sheets on trees that can be grown in Florida. They can be downloaded from the Internet
].
The tree is harvested from the wild for local use as a food and source of materials. It is widely used as a rootstock in China and is also often grown as an ornamental.
The cultivar 'Bradford', which produces sterile fruits, has been widely planted throughout the United States since the early 1900s, but recent cultivars, which have been bred to reduce the tendency of the tree to split in snow or high winds, have produced viable seeds. These seeds have been spread into the envoronment by fruit-eating animals, especially birds, and plants developing from these seeds have become established in various areas of eastern N. America. Pyrus calleryana often invades disturbed areas and can disrupt the establishment of middle to late successional species, sometimes forming dense thorny thickets that are impenetrable to humans[
413- Title
- Global Invasive Species Database
- Publication
-
- Author
-
- Website
- http://www.issg.org/database/welcome/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Very detailed information on almost 400 species (with more being added) of plants that have become weeds in areas outside their native range.
].
Known Hazards
The pollen can be bothersome to people with allergies[
372- Title
- Flowers of India
- Publication
-
- Author
-
- Website
- http://www.flowersofindia.net/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A wed site of native Indian plants, plus cultivated and naturalized species. It has good quality photos and terse details on more than 3,000 species and cultivars.
].
Although no specific information has been seen for this plant, the seed of many species in the family Rosaceae are likely to contain cyanogenic glycosides. When injested, these compounds break down in the digestive tract to release cyanide. Used in small quantities in both traditional and conventional medicine, this exceedingly poisonous compound has been shown to stimulate respiration, improve digestion, and promote a sense of well-being[
238- Title
- Encyclopaedia of Herbs and their Uses.
- Publication
-
- Author
- Bown. D.
- Publisher
- Dorling Kindersley, London.
- Year
- 1995
- ISBN
- 0-7513-020-31
- Description
- A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
]. It is also claimed by some to be of benefit in the treatment of cancer - though this claim has been largely refuted.
In larger concentrations, however, cyanide can cause gasping, weakness, excitement, pupil dilation, spasms, convulsions, coma and respiratory failure leading to death[
293- Title
- Poisonous Plants of North Carolina
- Publication
-
- Author
-
- Website
- http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes.
].
The levels of toxin can be detected by the level of bitterness:- sweet almonds, for example, contain only very low levels of it and are safe to eat in quantity, whilst bitter almonds (which are used as a flavouring in foods such as marzipan) contain much higher levels and should only be eaten in very small quantities. Great caution should be employed if the taste is moderately to very bitter[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Botanical References
11- Title
- Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
- Publication
-
- Author
- Bean. W.
- Publisher
- Murray
- Year
- 1981
- ISBN
- -
- Description
- A classic with a wealth of information on the plants, but poor on pictures.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
Range
E. Asia - southern and eastern China, central and southern Japan, northern Vietnam.
Habitat
Thickets and streamsides; at elevations up to 1,500 metres[
109- Title
- Plantae Wilsonae. Vol 1 - 3
- Publication
-
- Author
- Wilson. E. H.
- Website
- http://www.biodiversitylibrary.org
- Publisher
- University Press; Cambridge.
- Year
- 1911 - 1917
- ISBN
-
- Description
- Details of the palnts collected by the plant collector E. H. Wilson on his travels in China. Gives some habitats. Not for the casual reader. It can be downloaded from the internet.
]. Slopes, plains, mixed valley forests and thickets; at elevations from 100 - 1,800 metres[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
].
Properties
Weed Potential | Yes |
Edibility Rating | |
Other Uses Rating | |
Habit | Deciduous Tree |
Height | 8.00 m |
Growth Rate | Medium |
Pollinators | Insects |
Cultivation Status | Cultivated, Ornamental, Wild |
Cultivation Details
Pyrus calleryana is a very cold-hardy plant, tolerating temperatures down to around -40°c when dormant[
160- Title
- Wonder Crops. 1987.
- Publication
-
- Author
- Natural Food Institute,
- Publisher
-
- Year
-
- ISBN
-
- Description
- Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Prefers a good well-drained loam in full sun[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Grows well in heavy clay soils. Tolerates light shade but does not fruit so well in such a position. Tolerates atmospheric pollution, excessive moisture and a range of soil types if they are moderately fertile[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Established plants are drought tolerant[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Grows well on acid soils[
160- Title
- Wonder Crops. 1987.
- Publication
-
- Author
- Natural Food Institute,
- Publisher
-
- Year
-
- ISBN
-
- Description
- Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.
].
There are many named forms selected for their ornamental value[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. The cultivar 'Bradford' is a dense, vigorous tree that is resistant to fireblight, though it has a tendency to split in snow or high winds[
188- Title
- The RHS Gardener's Encyclopedia of Plants and Flowers
- Publication
-
- Author
- Brickell. C.
- Publisher
- Dorling Kindersley Publishers Ltd.
- Year
- 1990
- ISBN
- 0-86318-386-7
- Description
- Excellent range of photographs, some cultivation details but very little information on plant uses.
,
413- Title
- Global Invasive Species Database
- Publication
-
- Author
-
- Website
- http://www.issg.org/database/welcome/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Very detailed information on almost 400 species (with more being added) of plants that have become weeds in areas outside their native range.
,
1212- Title
- New Trees
- Publication
-
- Author
- Grimshaw J.; Bayton R.; Wilks H.
- Publisher
- Kew Publishing; London
- Year
- 2009
- ISBN
- 1842461737
- Description
- Provides comprehensive botanical descriptions and horticultural commentary on over 800 tree species that have been introduced to cultivation in recent decades.
].
Plants are moderate to fast growing[
1213- Title
- Southern Trees Fact Sheets
- Publication
-
- Author
- Gilman E.F.
- Website
- http://edis.ifas.ufl.edu/department_envhort-trees
- Publisher
- University of Florida, IFAS Extension
- Year
- 0
- ISBN
-
- Description
- A series of fact sheets on trees that can be grown in Florida. They can be downloaded from the Internet
].
Resists fireblight, collar rot, root aphis, pear psylla and root lesion nematodes[
160- Title
- Wonder Crops. 1987.
- Publication
-
- Author
- Natural Food Institute,
- Publisher
-
- Year
-
- ISBN
-
- Description
- Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.
]. This species is resistant to most important diseases and pests. For this reason, several different cultivars had been selected as street trees[
]..
Trees have a short dormancy period and lose their leaves late in the season[
160- Title
- Wonder Crops. 1987.
- Publication
-
- Author
- Natural Food Institute,
- Publisher
-
- Year
-
- ISBN
-
- Description
- Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.
].
Edible Uses
Fruit - raw or cooked[
105- Title
- Tanaka's Cyclopedia of Edible Plants of the World.
- Publication
-
- Author
- Tanaka. T. & Nakao S.
- Publisher
- Keigaku Publishing; Tokyo
- Year
- 1976
- ISBN
- -
- Description
- The most comprehensive list of edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
]. Best used after it has been exposed to frost[
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
,
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
], since this will soften and sweeten the flesh[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
]. The globose fruit is blackish-brown with pale dots about 10 - 25mm in diameter[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
].
Medicinal
None known
Other Uses
This species is widely used as a rootstock[
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
], especially for cultivars of Pyrus pyrifolia[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
]. It is resistant to most important diseases and pests, and is said to induce earlier bearing[
160- Title
- Wonder Crops. 1987.
- Publication
-
- Author
- Natural Food Institute,
- Publisher
-
- Year
-
- ISBN
-
- Description
- Fascinating reading, this is an annual publication. Some reports do seem somewhat exaggerated though.
,
].
The wood of this species is hard and close-grained, and is sometimes used for making furniture and stools[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
].
Propagation
Seed - best sown in a cold frame as soon as it is ripe in the autumn, it will then usually germinate in mid to late winter. Stored seed requires 8 - 10 weeks cold stratification at 1°c and should be sown as early in the year as possible[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Temperatures over 15 - 20°c induce a secondary dormancy in the seed[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in light shade in a cold frame or greenhouse for their first year. Plant them out in late spring or early summer of the following year.