Whitehorse City Council

Trees and Shrubs

The following trees and shrubs are considered to be environmental weeds of Whitehorse. They are species that invade and thrive in our native bushland where they do not naturally occur. These weeds tend to dominate and threaten the natural balance of the remnant indigenous flora and fauna of Whitehorse.

Boneseed
Chrysanthemoides monilifera
It is an evergreen yellow flowering shrub with leathery leaves with toothed edges. It has distinct bright yellow daisy-like flowers.
· Grows to 3m high
· Flowers: Winter
· Seed Set: Pods ripen early Summer

 Bone Seed

Cape Broom, Montpellior Broom
Genista monspessulana
It has round, ribbed, hairy twigs with ridged, woody, grey-brown stems. The leaves are divided into three, with each leaflet usually hairy. It’s yellow pea-like flowers are followed by oblong hairy seed pods.
· Grows to 2.5m
· Flowers: spring to early summer
· Seed set: Pods ripen late spring into summer

 Cape Broom, Montpellior Broom

Cootamundra Wattle
Acacia baileyana
It has fine silvery-grey feathery foliage and soft balls of goldenyellow flowers. This species can cause 'genetic pollution', being able to hybridise with other indigenous species, such as the endangered Downy Wattle (Acacia pubescens), putting it at further risk of extinction.
· Grows to 8m high
· Flowers mid-winter
· Seed set: Pods ripen spring and summer
cootamundra wattle 1

Cotoneaster
Cotoneaster spp.
These common shrubs grow as a groundcover or a shrub up to 5 m. They were commonly used as hedging plants due to their vigorous nature. They produce clusters of white flowers during spring and summer followed by red berries which hang on the branches for months after flowering. These plants have become widespread weeds in bushland and farming land.
· Grows to 5 m high.
· Flowers: Spring and Summer
· Seed set: Red berries in Autumn
cotoneaster sp 3


Desert Ash
Faxinus angustifolia
Desert ash is a spreading deciduous tree. Leaves consist of seven leaflets and turn various shades of yellow and gold in autumn. Inconspicuous flowers appear in winter when the tree is bare followed by large quantities of winged seeds.
· Grows to 25m high
· Flowers: Late winter
· Seed set: Summer
desert ash 2


Flax-leaved Broom
Genista linifolia
This is a shrub with hairy green stems and branches which can exceed two meters in height. Its leaves are made up of tough, green, lance-shaped leaflets with woolly undersides. Bright yellow pea-like flowers appear densely toward the ends of the branches. The fruit is a hairy pod.
· Grows to 3m high
· Flowers: Spring
· Seed set: Pods ripen late spring into summer


flax-leaved Broom 3


Gorse, Furze
Ulex europaenus
Sharp spiny shrub with woody spreading stems which are many-branched in younger plants but become bare at the base as the plant gets older. Pea-like yellow flowers are followed by hairy seed pods turning black when mature ready to explode to release seeds.
· Grows to 2m high
· Flowers: Winter to summer
· Seed set: Seed can be on a mature plant at almost anytime.

Gorse 2

Hawthorn
Crataegus monogyna
A large prickly deciduous shrub or small tree to 10 m that was previously grown for hedges or cheap barrier fences. These plants form a dense, impenetrable thicket and can dominate the under story of bushland. Now prevalent along roadsides invading natural bushland and unproductive farmland.
· Grows up to 10 m high
· Flowers: Spring
· Seed set: Red berries in Autumn
Hawthorn


Mirror Bush
Coprosma angustifolia
This evergreen shrub to small tree can grow to 6 m high. It has round, glossy leaves.
· Grows to 6m high
· Flowers: Spring to early summer
· Seed set: Orange berries in Summer and Autumn
coprosma repens 4


Privet
Ligustrum spp.
A number of species from shrubs to small trees are evergreen often found in moist, nutrient rich sites such as gullies, on roadsides and in home gardens. They have dark green leaves and produces small, white flowers, mostly in summer. It is easily recognised by sprays of purpleblack berries. The Berries containing seed are readily dispersed by birds and water.
· Grows up to 10 m high
· Flowers: Early spring
· Seed set: Orange berries in Autumn and Winter
Privet

Radiata or Monterey Pine
Pinus radiata
This evergreen tree has upward pointing branches and a rounded top. The needles are bright green with a blunt tip. The cones are egg-shaped and usually set asymmetrically on a branch. The bark is fissured and dark grey to brown.
· Grows up to 4m
· Flowers: Winter and Spring
· Seed Set: Cones can release seeds anytime
Radiata Pine


Sallow Wattle
Acacia longifolia
In Victoria it is thought to be native to the East Gippsland area. It is an extremely fast growing evergreen shrub. The plant produces delicate yellow flowers that grow in small bunches.
· Grows up to 8m high
· Flowers: Winter
· Seed set: Pods ripen early summer
sallow wattle 1


Sweet Pittosporum
Pittosporum undulatum
It has coarse grey bark and glossy green leaves. The small, white, highly fragrant flowers are followed by orange-tan berries which can persist for several months. It is a hardy and adaptable plant which can withstand extended dry periods once established.
· Grows up to 14m high
· Flowers: Early Spring
· Seed set: Orange berries in Autumn and Winter
sweet pittosporum 1


Willow
Salix spp
A number of different problem species exist all of them trees.
· Grows up to 25m
· Flowers: Late winter
· Seed set: Seed is rarely fertile but plants grow very easily from small branchlets taking root after being washed downstream from mature trees.
willow lrge