crack willow USDA PLANTS Symbol: SAFR
U.S. Nativity: Exotic
Habit: Hardwood Trees
Salix fragilis L.

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Taxonomic Rank: Magnoliopsida: Salicales: Salicaceae
Native Range: Europe, w. Asia (REHD);

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Tree(s); habitat
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Tree(s); foliage
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Foliage; sprout
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Twig(s)/Shoot(s); fruit;  leaf
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Twig(s)/Shoot(s); fruit;leaf;
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Robert Vidéki, Doronicum Kft., Bugwood.org
Additional Resolutions & Image Usage

Plant(s); 1. Branchlet with young shoots and male catkins (a - d). - 2. Branchlet with young shoots and female catkins (c - i). - 3. Branchlet and mature leafy shoots, with closed (a), and opening, many seeded capsules (b), and empty capsules (c). Seeds with a tuft of silky hairs. Stipules at n. Leaves are broadest at their lower third. - 4. Seedling with cotyledons and first ordinary leaves. - 5. Winter-branchlet. After Hempel & Wilhelm, 1889. Photos and explanations from the book: Zelimir Borzan. "Tree and Shrub Names in Latin, Croatian, English, and German, with synonyms", University of Zagreb, 2001.
Zelimir Borzan, University of Zagreb, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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Invasive Listing Sources:
City of Ann Arbor Michigan Parks and Recreation
Faith Campbell, 1998
Mid-Atlantic Exotic Pest Plant Council, 2005
Reichard, Sarah. 1994.  Assessing the potential of invasiveness in woody plants introduced in North America. University of Washington Ph.D. dissertation.