Mackenzie willow

  • Latin name: Salix prolixa Andersson
  • French name: Saule du Mackenzie
  • Taxonomic Serial Number: 22572
    520846 [syn. S. mackenzieana (Hook.) Andersson]
    540232 [S. rigida var. mackenzieana]
Description

Leaves

  • Leaf  with round-tipped stipules and detail of glandular leaf margin - Mackenzie willow

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

  • Seed catkin - Mackenzie willow
  • Pollen catkin - Mackenzie willow
  • Seed flower - Mackenzie willow
  • Pollen flower - Mackenzie willow

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

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