Canadian Poplar
Populus × canadensis
Willow family (Salicaceae)
Thirty meter high hybrid
The Carolina poplar is a hybrid: a cross between the black poplar (Populus nigra), which grows wild along the Dutch rivers, and the American necklace poplar (Populus deltoides). The tree can reach over 30 m in height and has a broad, loose crown. This cross originated in France around 1750 and its vernacular name (Canadian poplar in Dutch and Carolina poplar in English) is therefore confusing. Carolina poplars are, like the balsam poplar (Populus balsamifera), widely planted because the wood was used for making clogs and matchsticks.
Carolina poplar and its relatives are pollinated by the wind. The seeds with their cotton-like strands are released when the fruit capsules split open – they may be so abundant that it can give the impression of snow lying under the trees.
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Crown jewel in the Utrecht Botanic Gardens.
The Canadian poplar was, and is, widely planted for timber. It was also used to make clogs and the few remaining clog factories still use its easy-to-work soft wood. Today the wood is used for making matches.
It is not the fluffy 'summer snow' but the pollen that causes allergic reactions in humans as it is only the pollen and not the 'fluff' that comes into contact with mucous membranes. However according to the literature poplar pollen is hardly allergenic.
Details
Description: | Tree, up to 40 m, dioecious, (male and female inflorescences on separate trees). |
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Distributions: | Canadian poplar is a cross between populus nigra and populus deltoides and arose in france around 1750 |
Habitat: | Almost always planted. in timber plantations, along roads and canals, as windbreaks and to evaporate large amounts of water in wetlands and floodplains in order to dry out the soil. |
Year cycle: | Perennial (polycarpic decidous) |
Hardiness: | Colder than -4 f (very hardy) |
Flowering period: | Maart - april |
Flower color: | Red |
Notes on flowers: | Flowers dioecious, catkins; the reduced flowers in the male catkins have many red-purple stamens and an incised bract, known as a catkin scale; female catkins have flowers with yellow stigmas. |
Fruiting period: | Mei - juni |
Fruit color: | Green |
Notes on fruits: | Fertilized female catkins flowers become capsules containing seeds, surrounded by a downy fluff, that are spread by the wind when the capsule bursts open; some trees produce so much fluff that looks like snow - the dutch call this "summer snow". |
At its best: | Juni |
Sources
http://www.floravannederland.nl/planten/canadapopulier/,https://www.wur.nl/upload_mm/a/8/b/fc765de3-c504-492c-a1a4-75d5e77bf2e6_popcanaf.pdf,
http://www.soortenbank.nl/soorten.php?soortengroep=flora_nl_v2&id=1132,
http://www.beanstreesandshrubs.org/browse/populus/populus-x-canadensis-moench/,
https://nl.wikipedia.org/wiki/Canadapopulier