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Nom français: Peuplier à feuilles deltoides

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LEAVES – Alternate, simple, almost triangular in shape, with rounded teeth. Petiole (leaf stem) is long and flattened.
TWIG – Stout. Pit is star-shaped. Leaf scars (the place where each leaf joined the twig) are big and you can easily see the three vascular scars (darker dots, that is were vascular tissues used to connect the leaf to the twig to transport sap and water around). Eyelash-like hairs at juncture of bud and scar. Buds are large, brown, very shiny and sticky.
BARK – Yellow-green, smooth or lightly fissured when young, becoming dark gray and with thick flat ridges on old trees.
FRUITS – Very small seeds attached to cotton-like strands, they are all contained in capsules which split open in the spring or early summer. Cottonwoods are the trees producing all the white fluff in the spring… have you ever noticed it? A single tree releases millions of seeds in a season!

Cottonwood is a big fast growing tree, which can easily reach 40-50 meters tall. It loves the riverbanks and river valleys. It grows in southern Quebec and central US.

Fontes e Créditos

1. (c) Jay Sturner, alguns direitos reservados (CC BY), http://commons.wikimedia.org/wiki/File:Eastern_Cottonwood_(Populus_deltoides)_-_Flickr_-_Jay_Sturner.jpg
2. (c) Photo by David J. Stang, alguns direitos reservados (CC BY-SA), http://commons.wikimedia.org/wiki/File:Populus_deltoides_23zz.jpg
3. (c) Plant Image Library, alguns direitos reservados (CC BY-SA), http://commons.wikimedia.org/wiki/File:Populus_deltoides_(Eastern_Cottonwood)_(42164128654).jpg
4. Herman, D.E., et al. 1996. North Dakota tree handbook. USDA NRCS ND State Soil Conservation Committee; NDSU Extension and Western Area Power Administration, Bismarck. Courtesy of ND State Soil Conservation Committee. Provided by USDA NRCS ND State Office, sem restrições de direitos de autor conhecidas (domínio público), http://commons.wikimedia.org/wiki/File:Populus_deltoides_NRCS-1.jpg
5. (c) Alice Roy-Bolduc, alguns direitos reservados (CC BY-SA)

Mais informações

• BioDiversity4All taxon page
• African Plants - a photo guide
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
• CalPhotos
• eFloras.org
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• Go Botany
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• Jepson eFlora
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• New Zealand Plant Conservation Network
• OregonFlora.org
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online

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