Top

Scientific Name
Synonyms
Family
Common Names
Origin
Cultivation
Naturalised Distribution
Habitat
Habit
Distinguishing Features
Stems and Leaves
Flowers and Fruit
Reproduction and Dispersal
Environmental Impact
Legislation
Management
Similar Species
Print Fact Sheet
ABCDEFGHIJKLMNOPQRSTUVWYXZ

Click on images to enlarge

infestation (Photo: Sheldon Navie)

climbing habit (Photo: Sheldon Navie)

habit in fruit (Photo: Sheldon Navie)

older stems (Photo: Sheldon Navie)

close-up of spines on stem (Photo: Sheldon Navie)

close-up of flowers (Photo: Sheldon Navie)

immature fruit (Photo: Sheldon Navie)

mature fruit (Photo: Sheldon Navie)

close-up of fruit (Photo: Sheldon Navie)

seedling (Photo: Sheldon Navie)

native asparagus fern (Asparagus racemosus) also has a climbing habit (Photo: Sheldon Navie)

large infestation (Photo: Biosecurity Queensland, QDPI&F)

infestation in the Boondall Wetlands in Brisbane (Photo: Sheldon Navie)

branches with 'leaves' (Photo: Sheldon Navie)

close-up of 'leaves' (Photo: Sheldon Navie)

close-up of old fruit (Photo: Tracey Slotta at USDA PLANTS Database)

comparison of the 'leaves' of Asparagus plumosus, on the left, and Aspargaus africanus, on the right (Photo: Sheldon Navie)

the somewhat larger and flattened 'leaves' of Asparagus racemosus (Photo: Sheldon Navie)

Asparagus africanus

Scientific Name

Asparagus africanus Lam.

Synonyms

Protasparagus africanus (Lam.) Oberm.

Family

Asparagaceae (Queensland, New South Wales, the ACT and Western Australia)
Liliaceae (Victoria, Tasmania, South Australia and the Northern Territory)

Common Names

African asparagus, asparagus fern, climbing asparagus, climbing asparagus fern, ornamental asparagus, sparrowgrass, wild asparagus

Origin

Native to large parts of eastern and sub-Saharan Africa (i.e. Egypt, Eritrea, Ethiopia, Somalia, Sudan, Kenya, Tanzania, Uganda, Burkina Faso, Gambia, Ghana, Nigeria, Senegal, Malawi, Mozambique, Zimbabwe and South Africa) and the Arabian Peninsula (i.e. Saudi Arabia and Yemen).

Cultivation

Climbing asparagus fern (Asparagus africanus) has been widely cultivated as a garden plant, particularly in eastern Australia.

Naturalised Distribution

This species is becoming widely naturalised in eastern Australia (i.e. in south-eastern and central Queensland and north-eastern New South Wales). It is most common near settlements in south-eastern Queensland, particularly around Brisbane.

Habitat

Primarily a weed of sub-tropical regions, this species invades forests, rainforest margins, open woodlands (particularly those near habitation), urban bushland, and in the vegetation along waterways (i.e. in riparian areas). It is also common in disturbed sites and waste areas, along roadsides, and in parks and gardens.

Habit

A long-lived (i.e. perennial) climber growing up over other vegetation (even over large trees) or a sub-shrub with scrambling stems up to 3 m long.

Distinguishing Features

Stems and Leaves

The stems are hairless (i.e. glabrous) and often bear thorns or spines (2-10 mm long). They usually grow in a twining fashion and bear numerous short spreading branches. The stems of older plants may become quite thick and woody.

The leaves are reduced to minute scales and what appear to be the 'leaves' are actually small stem segments which function as leaves (i.e. cladodes). Several (7-12) of these small bristle-like 'leaves' (6-15 mm long and only about 0.5 mm wide) are produced in a cluster above each scale leaf. They are hairless (i.e. glabrous) and have sharply-pointed tips.

Flowers and Fruit

The flowers are usually produced in small clusters, each containing several flowers, in the forks (i.e. axils) of the scale leaves. They are borne on individual stalks (i.e. pedicels) 5-10 mm long and have three sepals (2.5-4 mm long) and three petals (2.5-4 mm long). The sepals and petals (i.e. perianth segments or tepals) are very similar, whitish in colour, and appear to be six petals. The flowers also have six stamens (2-3.5 mm long), usually with white filaments and yellow anthers. Flowering occurs mainly during spring.

The fruit is a rounded (i.e. globular) berry (5-6 mm across) containing a single seed. These berries are initially green in colour, but turn orange and become somewhat shrivelled as they mature. They may be present throughout most of the year.

Reproduction and Dispersal

This plant reproduces mainly by seed. Its berries are readily eaten and spread by birds and other animals. The seeds may also be spread in dumped garden waste.

Environmental Impact

Climbing asparagus fern (Asparagus africanus) is regarded as an environmental weed in Queensland and New South Wales, and was listed as a priority environmental weed in one Natural Resource Management region. It is a major environmental weed in south-eastern Queensland, and was recently ranked among the top ten most invasive plants in this region. It is also a significant environmental weed in north-eastern New South Wales, particularly in coastal districts north from Lismore. Climbing asparagus fern (Asparagus africanus) has only become naturalised in the last 30 years or so, and is still spreading. It is thought to have the potential to invade rainforests, open woodlands and riparian vegetation throughout the coastal and sub-tropical regions of eastern Australia.

Climbing asparagus fern (Asparagus africanus) scrambles over other vegetation and climbs up to 12 m into the canopies of taller trees. It can often completely smother smaller trees, understorey shrubs and ground layer plants and its fibrous roots form dense mats just below the soil surface, which are thought to interfere with the establishment and survival of seedlings of native species. In south-eastern Queensland this species is most prominent in remnant semi-evergreen vine thickets and brigalow forest communities, particularly in the Marburg and Boonah districts. It also invades gullies and some wetter eucalypt communities.

Legislation

This species is declared under legislation in the following states and territories:

Management

For information on the management of this species see the following resources:

Similar Species

Climbing asparagus fern (Asparagus africanus) is very similar to another species known as climbing asparagus fern (Asparagus plumosus) and similar to ground asparagus fern (Asparagus aethiopicus 'Sprengeri'), bridal veil (Asparagus declinatus), bridal creeper (Asparagus asparagoides), garden asparagus (Asparagus officinalis), sicklethorn (Asparagus falcatus), Ming asparagus fern (Aspargaus retrofractus) and other asparagus ferns (Asparagus scandens and Asparagus virgatus). These species can be distinguished by the following differences:

It is also similar to the native asparagus fern (Asparagus racemosus) which is only found in northern Australia. These two species can be distinguished by the following differences: