as marshes and fens. It is also found in wet stands of black spruce, Sphagnum bogs, silty and boggy shorelines and wet sands. It prefers open, sunny or partly sunny habitats. Conservation The round-leaved sundew is classified as Least Concern in the IUCN red list. In North America, it is considered endangered in the US states of Illinois and Iowa, exploitably vulnerable in New York, and threatened in Tennessee. . The species is ranked S2, imperiled, in the state of Colorado. Cultivation D. rotundifolia is one of the temperate species of Drosera cultivated by growers interested in carnivorous plants. To be grown successfully, plants of the wild species must be given a substantial period of winter dormancy during which they form hibernacula. The cultivar D. rotundifolia 'Charles Darwin' can be grown more successfully without a period of dormancy. Medicinal properties According to D.H. Paper, et al., Drosera rotundifolia plant extracts show great efficacy as an anti-inflammatory and antispasmodic, more so than D. madagascariensis, as a result of the flavonoids such as hyperoside, quercetin and isoquercetin, but not the naphthoquinones present in the extracts. The flavonoids are thought to affect the M3 muscarinic receptors in smooth muscle, causing the antispasmodic effects. Ellagic acid in D. rotundifolia extracts has also been shown to have antiangiogenic effects. Notes References Den virtuella floran - Rundsileshår. Naturhistoriska riksmuseet, 1997. Accessed 31 May 2005. Gallery External links rotundifolia Carnivorous plants of Asia Carnivorous plants of Europe Carnivorous plants of North America Plants described in 1753 Taxa named by Carl Linnaeus