Ageratina adenophora Spreng. Show All Show Tabs sticky snakeroot. About our new maps. Subordinate Taxa. Legal Status. This plant can be weedy or invasive according to the authoritative sources noted below.

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Click on images to enlarge. Note: Eupatorium adenophorum Spreng. Widely naturalised in eastern Australia and also present in some parts of southern Australia. California , French Polynesia, Fiji and Hawaii. This species is a weed of roadsides, railways, pastures, fence-lines, disturbed sites, waste areas and waterways in sub-tropical and warmer temperate regions.

It it is also commonly found in urban bushland, open woodlands, forest margins, rainforest clearings and plantation crops e. A long-lived i. It produces numerous upright i. The branched stems are densely covered in sticky i. The small flower-heads i. These flower-heads mm across are borne in large numbers and arranged in clusters at the tips of the branches i. The tiny tubular florets mm long are white and contain both male and female flower parts i. The 'seeds' i. These 'seeds' mm long and 0.

However, they are topped with a ring i. This plant reproduces mainly by seed. They may also be spread in by animals and vehicles and can contaminate agricultural produce.

Crofton weed Ageratina adenophora is regarded as a significant environmental weed in Queensland and New South Wales, and was recently listed as a priority environmental weed in four Natural Resource Management regions in these states.

This species colonises forest margins, stream banks and disturbed areas, preferring shaded wetter areas but also growing in open sunny sites. It also thrives in damp areas such as wetland margins, drainage lines, gullies and in clearings in wetter forests.

It grows in large dense clumps and will eventually out-compete all other plants in an area, choking out native vegetation and forming a monoculture. In Queensland, crofton weed Ageratina adenophora is most prevalent in south-eastern parts of the state, where it invades pastures and colonises natural areas.

It is a very significant environmental weed in south-eastern Queensland, where it was recently ranked among the top 20 most invasive plant species.

It is most common in northern New South Wales, but is also relatively common along the central coast and in the northern parts of the south coast. This species appears on several local environmental weed lists in the Sydney area e. Crofton weed Ageratina adenophora is also listed as a principal weed species in lowland rainforests in eastern New South Wales, an ecological community that has been given an endangered listing in this state. Crofton weed Ageratina adenophora is also a weed of particular concern on Lord Howe Island.

This species tends to locally dominate exposed sites, where it excludes native species. It occurs at many sites on the island, but is particularly apparent on exposed mountain slopes e. It is considered to be having a serious impact on the World Heritage values of Lord Howe Island and threatening the survival of two endangered plant species on the island i.

Carmichaelia exsul and Calystegia affinis. These are not the only rare native species to be threatened by crofton weed Ageratina adenophora. Invasion of habitat by this weed is also seen as a threat to the vulnerable Hartman's sarcochilus Sarcochilus hartmannii , an epiphytic orchid in north-eastern New South Wales, and the Border Ranges daisy Brachyscome ascendens , and endangered species restricted to highland areas in south-eastern Queensland and north-eastern New South Wales.

The endangered native jute Corchorus cunninghamii is also threatened by invasion of crofton weed Ageratina adenophora and other weed species at many of the locations where it is known to exist. The giant spear lily Doryanthes palmeri is another vulnerable native species from south-eastern Queensland and north-eastern New South Wales that is threatened by crofton weed Ageratina adenophora.

One study found that seedlings of this species that had begun to establish were soon out-competed by crofton weed Ageratina adenophora , and that there were dense populations of this and other weed species in some of the sites were this species is found. Crofton weed Ageratina adenophora is also an aggressive weed in pastures in eastern Australia. It prefers wetter pastures e. It is also poisonous to livestock, being particularly toxic to horses.

In fact, this species is the cause of an acute pulmonary disease in horses which is known as "Tallebudgera horse disease" in Queensland and "Numinbah horse sickness" in New South Wales. This condition can be fatal if enough of the weed is consumed over a long period.

Crofton weed Ageratina adenophora is very similar to mistflower Ageratina riparia , which is also known as 'creeping crofton weed', and relatively similar to Siam weed Chromolaena odorata and Senegal tea plant Gymnocoronis spilanthoides.

These species can be distinguished by the following differences:. Blue billygoat weed Ageratum houstonianum , billygoat weed Ageratum conyzoides subsp. Check our website at www. The control methods referred to in this fact sheet should be used in accordance with the restrictions federal and state legislation, and local government laws directly or indirectly related to each control method.

These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DEEDI does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.

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Scientific name

Its spread is restricted there n Its spread is restricted there now due to adequate legislation and control measures. It is, however, still spreading in other parts of the world such as China, and due to its potential introduction as a seed contaminant and potential impacts, it must be considered as a high risk species meriting further attention. It is known to be invasive in Kenya and is also present in Uganda. Control is possible, although difficult, and biological control has been attempted and proved at least partially successful. The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status.


Ageratina Adenophora Herb Uses, Benefits, Cures, Side Effects, Nutrients

Synonyms: Eupatorium adenophorum, E. Common names: eupatory, croftonweed, thoroughwort, sticky snakeroot, catweed, hemp agrimony, sticky agrimony, sticky eupatorium. Ageratina adenophora croftonweed, eupatorium is a perennial herb or small shrub family Asteraceae found along the coast of California and in the South Coast and Transverse Ranges. It prefers disturbed areas, coastal canyons, riparian areas and scrub, and is especially invasive in mild coastal areas. Originally introduced to California as an ornamental plant, croftonweed escaped cultivation by producing abundant seed that is dispersed via wind, water, soil movement, and by clinging to animals and people. Does not include management information. Presentations are linked where available.


Weeds of Australia - Biosecurity Queensland Edition Fact Sheet

Click on images to enlarge. Crofton weed , cat weed , catweed, croftonweed, hemp agrimony, Mexican devil, sticky agrimony, sticky eupatorium, sticky snakeroot, white thoroughwort. Ageratina adenophora is invasive in parts of Kenya including around Lake Naivasha A. Witt pers. The editors are not aware of records of the presence of A. This species is a weed of roadsides, railways, pastures, fence-lines, disturbed sites, waste areas and riparian zones banks of watercourses in subtropical and warmer temperate regions. It is also commonly found in urban open spaces, open woodlands, forest margins and rainforest clearings.

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