Mackenzie willow
- Latin name: Salix prolixa Andersson
- French name: Saule du Mackenzie
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Taxonomic Serial Number: 22572
520846 [syn. S. mackenzieana (Hook.) Andersson]
540232 [S. rigida var. mackenzieana]
Description
Leaves
Form
- Narrow
- Widest above the middle
- Tip long, base rounded
- Stipules round-tipped
Length
- 5–15 cm
Colour
- Lower surface whitened
- Young leaves reddish
Margin
- Finely toothed and/or glandular
Petiole
- Red
Buds
Form
- Pointed, pressed against the twig, closely spaced
- Covered with a single scale
- No true terminal bud; end bud originates as a lateral bud
- Flower buds larger than leaf buds
- Leaf scars V-shaped, with 3 vein scars
- Stipule scars on either side
Twigs
Form
- Sometimes with long shaggy hairs
Colour
- Brownish
- Larger stems light brown to reddish-brown
Flowers
Form
- Bracts with curling hairs
Colour
- Brown
Structure
- Dioecious
Floral timing
- With the leaves
Size
Height
- To 5 m
Habitat
Site
- Along streams and lakeshores
- Aspen woodlands and lower mountain slopes
Range
Northwest Territories to southeast Yukon, south through Alberta and British Columbia into the United States
Insects and mites
Insects that cause damage to this tree.
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Birch and alder flea weevil
Scientific name: Rhynchaenus testaceus (Mull)
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Poplar-and-willow borer
Scientific name: Cryptorhynchus lapathi (Linnaeus).
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Willow flea weevil
Scientific name: Isochnus rufipes (LeConte)
Foliage or buds
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Bruce spanworm
Scientific name: Operophtera bruceata (Hulst)
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Ceanothus silk moth
Scientific name: Hyalophora euryalis (Walker)
- Eulithis destinata (Moesch)
- Eupithecia subfuscata (Haworth)
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Mourningcloak butterfly or spiny elm caterpillar
Scientific name: Nymphalis antiopa (Linnaeus)
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Pero moth
Scientific name: Pero morrisonaria (Hy. Edwards)
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Poplar-and-willow borer
Scientific name: Cryptorhynchus lapathi (Linnaeus).
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Speckled green fruitworm
Scientific name: Orthosia hibisci (Guenée)
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White slaut
Scientific name: Tetracis cachexiata (Guenée)