Drosera rotundifolia
Drosera rotundifolia | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Caryophyllales |
Family: | Droseraceae |
Genus: | Drosera |
Subgenus: | Drosera subg. Drosera |
Section: | Drosera sect. Drosera |
Species: | D. rotundifolia
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Binomial name | |
Drosera rotundifolia L. | |
Synonyms[3] | |
List
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Drosera rotundifolia, the round-leaved sundew,
Description
The leaves of the common sundew are arranged in a basal rosette. The narrow, hairy, 1.3-to-5.0-centimetre (0.51 to 1.97 in) long petioles support 4-to-10-millimetre (0.16 to 0.39 in) round laminae. The upper surface of the lamina is densely covered with red glandular hairs that secrete a sticky mucilage.
A typical plant has a diameter of around 3 to 5 centimetres (1.2 to 2.0 in), with a 5-to-25-centimetre (2.0 to 9.8 in) tall inflorescence. The flowers grow on one side of a single slender, hairless stalk that emanates from the centre of the leaf rosette. White or pink in colour, the five-petalled flowers produce 1.0-to-1.5-millimetre (0.039 to 0.059 in), light brown, slender, tapered seeds.[5]
In the winter, D. rotundifolia produces a hibernaculum to survive the cold conditions. This consists of a bud of tightly curled leaves at ground level.
Carnivory
The plant feeds on
It has been assumed that insects were also attracted to the bright red color of the common sundew, but studies using artificial traps have suggested that color does not affect prey attraction.[8] New climates have been discovered with new plant growth but don’t have the food associated with the requirements for growth. In areas that lack this food associated for growth, new studies have been conducted to determine how these plants are able to grow in these diverse climates where these plants area able to flourish. In a study by L.M. Thoren et al. posted in New Phytologist, the carnivory of the Drosera rotundifolia was tested against growing conditions where the plant's insect prey was not sufficient to promote proper growth. The group tested the plants ability to grow with limited prey but increased inorganic nutrients within the soil. The results revealed the ability of the plant to utilize the nutrients over the normal prey which caused the reduction in carnivory investment of the plant. These results showed that the plant would adapt to the current environment for growth utilizing available resources as food.[9]
Distribution
In North America, the common sundew is found in all parts of Canada except the Canadian Prairies and the tundra regions, southern Alaska, the Pacific Northwest, and along the Appalachian Mountains south to Georgia and Louisiana. In the western United States, roundleaf sundew is found in mountain fens as far south as the Sierra Nevada of California and in a disjunct cluster of fen occurrences in the Rocky Mountains of Colorado.[10] In the eastern United States, the sundew plant is found in parts stretching from Nova Scotia down the coast into Florida. In addition to Georgia, plants are now being seen in Alabama and Mississippi. West of the Mississippi River plants are located along the pacific coast from Alaska down the coast to California with new plants detected in Iowa, Minnesota and in two recently recorded sites in Gunnison County, Colorado and Bottineau County, North Dakota.[11]
It is found in much of
In
In Asia, it is found across Siberia and Japan, as well as parts of Turkey, the Caucasus region, the Kamchatka Peninsula southern parts of Korea, and parts of China. Populations can also be found on the islands of New Guinea and Mindanao.[13]
Habitat
The common sundew thrives in wetlands such as
Conservation
The round-leaved sundew is classified as Least Concern in the IUCN red list. In
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.[16]
Medicinal properties
According to D.H. Paper, et al.,
Notes
- ^ Maiz-Tome, L. 2016. Drosera rotundifolia. The IUCN Red List of Threatened Species 2016: e.T168798A1232630. https://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T168798A1232630.en. Accessed on 29 March 2022.
- ^ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 29 March 2022.
- ^ "Drosera rotundifolia L." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 7 March 2024.
- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ Regents of the University of California (1993). The Jepson Manual: Higher Plants of California. Berkeley, California: University of California Press.
- ^ "Drosera rotundifolia : Round-Leafed Sundew". msu.edu. Retrieved May 22, 2017.
- PMID 22506640. Retrieved May 22, 2017.
- PMID 24740904.
- PMID 33873350.
- ^ Wolf, Evan; Gage, Edward; Cooper, David (2006-06-26). "Drosera rotundifolia L. (roundleaf sundew): A Technical Conservation Assessment" (PDF). USDA Forest Service, Rocky Mountain Region, Species Conservation Project.
- ^ "Drosera rotundifolia". www.fs.usda.gov. Retrieved 2022-12-03.
- ^ "Round-leaved sundew | Plant & fungi species | Wild plants". www.plantlife.org.uk. Archived from the original on 2010-10-06. Retrieved 2016-01-03.
- . Retrieved 10 December 2021.
- ^ C.Michael Hogan. 2011. Drosera rotundifolia. Encyclopedia of Earth. Eds. M.McGinley & C.J.Cleveland. National Council for Science and the Environment. Washington DC
- ^ "USFS species evaluation" (PDF).
- ^ Brittnacher, John. "Growing cold temperate Drosera". International Carnivorous Plant Society. Retrieved 2013-06-19.
- S2CID 20405232.
- PMID 15344845.
References
- Karen Legasy; Shayna LaBelle-Beadman; Brenda Chambers. (1995). Forest Plants of Northeastern Ontario. Ontario: Lone Pine Publishing.
- (in Swedish) Den virtuella floran - Rundsileshår. Naturhistoriska riksmuseet, 1997. Accessed 31 May 2005.
- Wolf, EC; Gage, E; Cooper, DC (2006). "Drosera rotundifolia L. (roundleaf sundew): A technical conservation assessment" (PDF). USDA Forest Service, Rocky Mountain Region, Species Conservation Project.
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Gallery
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Drosera rotundifolia in a peat moss cushion
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Growing in red sphagnum
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Growing in a rotting log in Oregon
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Detail of the leaf
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In unusual ground, Tablelands, Gros Morne National Park, Newfoundland and Labrador
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D. rotundifolia from the bog at Lake Bemidji State Park
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Details of the leaf
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Drosera rotundifolia with an insect
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Drosera rotundifolia from a bog in Lithuania
External links
Media related to Drosera rotundifolia at Wikimedia Commons