Willows
All Salix spp. other than S. babylonica, S. x calodendron and S. x reichardtii
family
Salicaceae
origin
Exotic
declaration
Category 3 Restricted Matter (Biosecurity Act 2014)
Must not be distributed or disposed. This means it must not be released into the environment unless the distribution or disposal is authorised in a regulation or under a permit.
Common names
Pussy willow, Grey sallow, Crack willow, Basket willow, Black willow.
The term 'willow' refers to several different tree and shrub species, including weeping willow. Willow species are Weeds of National Significance (WONS). They can invade riverbanks and wetlands, causing erosion and blocking waterways. Willows are a serious weed in Victoria, New South Wales and the Australian Capital Territory, causing millions of dollars in damage. Smaller numbers are also found in southern Queensland.
Impact
Impact
Unlike most other vegetation, willows spread their roots into the bed of a watercourse, slowing the flow of water and reducing aeration. They form thickets which divert water outside the main watercourse or channel, causing flooding and erosion where the creek banks are vulnerable. Willow leaves create a flush of organic matter when they drop in autumn, reducing water quality and available oxygen, and directly threatening aquatic plants and animals. This, together with the amount of water willows use, damages stream health.
Location
Location
Characteristics
Characteristics
Similar Species
Similar Species
Unlike most other vegetation, willows spread their roots into the bed of a watercourse, slowing the flow of water and reducing aeration. They form thickets which divert water outside the main watercourse or channel, causing flooding and erosion where the creek banks are vulnerable. Willow leaves create a flush of organic matter when they drop in autumn, reducing water quality and available oxygen, and directly threatening aquatic plants and animals. This, together with the amount of water willows use, damages stream health.
