Scientific Name: Salix turnorii
Taxonomy Group: Vascular Plants
Last COSEWIC Assessment: May 2000
Last COSEWIC Designation: Special Concern
SARA Status: Schedule 1, Special Concern
Image of Turnor's Willow
Plants of the Turnor's Willow are erect, narrowly pyramidal shrubs, 1 to 2 m (sometimes up to 4 m) tall, with pale grayish-green bark that is usually smooth on branches that are at least a year old. Younger twigs have reddish or purplish bark that may be hairy at first but then becomes smooth. The elongated, roughly oval-shaped, flat leaves are noticeably longer (2 to 3.5 cm) than they are wide (0.5 to 1 cm) and have prominently serrated (toothed) edges. They have a rounded base but come to a sharp point at the tip. Both surfaces are pale green, but the undersurface is paler. They can be hairy at first but become almost smooth when mature. The leaf stalks are 2 to 5 mm long. The catkins consist of clusters of flowers borne in spikes. At the base of each catkin is a scale-like bract. The seeds bear tufts of cottony hairs. This species is dioecious (has separate male and female plants).
Distribution and Population
The Turnor's Willow is endemic to (found only in) the Athabasca Sand Dunes of northwestern Saskatchewan. It occurs as scattered individual plants on only four of the larger dune fields within the dune complex. Although no studies have been done on population size and trends, the population is believed to be stable.
This willow occurs on open, active sand dunes, especially on dune crests, ridge-lines and moist depressions, mostly on leeward slopes, but also on shallow shifting sands on gravel plains and sometimes on windward slopes.
In early spring, the catkins appear with the leaves. Because this willow is dioecious, self-pollination is impossible. The flowers are mostly insect-pollinated, but wind pollination may sometimes also occur. The seeds are specialized for wind dispersal; they are light weight and have tufts of fine hairs. Seeds germinate best in the wetter parts of the dunes, and so this is where seedlings become established. This willow reproduces by seeds, but some branches that become buried in the sand can root and subsequently branch. It is believed that this species sometimes hybridizes with other willows in the area.
Although the dunes occur in a remote area, threats to the willow from potential increased public accessibility to the dune fields include trampling and habitat disturbance by sight-seekers, eco-tourists, and various forms of recreational use of the dunes (e.g., dune buggies, motorcycles).
Federal ProtectionMore information about SARA, including how it protects individual species, is available in the Species at Risk Act: A Guide.
The entire range of Turnor's Willow is contained within Athabasca Sand Dunes Provincial Wilderness Park.
Provincial and Territorial Protection
PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.
1 record(s) found.
- Management Plans (1 record(s) found.)
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