Clarkson et al. (2003) state that, \"Branch leaves are simple ovate or lanceolate and all leaves are opposite. The leaves are divided at the base into three, or more rarely five, lance-shaped toothed lobes with the middle lobe being much larger than the others (Grieve, 2003). This gives the leaf the general form of Hemp, hence the name derived from cannabis. Leaves have short hairs and many glands (Clapham et al. 1987) and there are many reported medicinal uses (Glick, 2002; Grieve, 2003). The flowers, which bloom in late summer and autumn, are in heads in dense terminal corymbs, each head with 5-6 small flowers, purple to white in colour (Clapham et al. 1987). Pollination in its native country takes place via Lepidoptera and some flies and bees (Clapham et al. 1987).\"
Plants For A Future Database (2000) reports that, \"the leaves and flowering tops are alterative, cholagogue, depurative, diuretic, emetic, expectorant, febrifuge, purgative and tonic. The plant has a long history of use as a gentle laxative that does not provoke irritation, though excessive doses cause purging and vomiting. A tea made from the dried leaves will give prompt relief if taken at the onset of influenza. Recent research has shown that the plant might have anti-tumour activity, though the plant also contains pyrrolizidine alkaloids that can cause damage or cancer to the liver. The plant is harvested in the summer and dried for later use. The roots are diaphoretic, laxative and tonic. They are harvested in the autumn and dried for later use. Recently the plant has been found of use as an immune system stimulant, helping to maintain resistance to acute viral and other infections. A homeopathic remedy is made from the leaves. It is used in the treatment of influenza and feverish chills and also for disorders of the liver, spleen and gall bladder. The leaves have been laid on bread in order to prevent it from becoming moldy. The leaf juice has been rubbed onto the coats of animals as an insect repellent.\"
Principal source: Clarkson et al. 2003 Eupatorium cannabinum Invasion of Ihupuku Swamp, Waverley.
Compiler: National Biological Information Infrastructure (NBII) & IUCN/SSC Invasive Species Specialist Group (ISSG) with support from the Terrestrial and Freshwater Biodiversity Information System (TFBIS) Programme (Copyright statement)
Review: Dr. Bruce Clarkson, Centre for Biodiversity and Ecology Research. Department of Biological Sciences, The University of Waikato, Hamilton New Zealand.
Publication date: 2005-11-11
Recommended citation: Global Invasive Species Database (2020) Species profile: Eupatorium cannabinum. Downloaded from http://www.iucngisd.org/gisd/species.php?sc=802 on 18-09-2020.