Difference between revisions of "Hypericum mutilum"
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==Taxonomic Notes== | ==Taxonomic Notes== | ||
| − | Synonyms: | + | Synonyms: none.<ref name="weakley">Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.</ref> |
| − | Varieties: ''Hypericum mutilum'' L. var. | + | Varieties: ''Hypericum mutilum'' L. ''var. latisepalum'' Fernald; ''Hypericum mutilum'' L. ''var. mutilum''.<ref name="weakley">Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.</ref> |
==Description== | ==Description== | ||
Revision as of 13:24, 16 September 2020
Common name: dwarf St. Johnswort [1]
| Hypericum mutilum | |
|---|---|
| |
| Photo by John B | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Magnoliophyta - Flowering plants |
| Class: | Magnoliopsida - Dicots |
| Order: | Theales |
| Family: | Clusiaceae |
| Genus: | Hypericum |
| Species: | H. mutilum |
| Binomial name | |
| Hypericum mutilum L | |
| |
| Natural range of Hypericum mutilum from USDA NRCS Plants Database. | |
Contents
Taxonomic Notes
Synonyms: none.[2]
Varieties: Hypericum mutilum L. var. latisepalum Fernald; Hypericum mutilum L. var. mutilum.[2]
Description
H. mutilum is an annual/perennial forb/herb native to Canada and North America and introduced in Hawaii. [1]
Distribution
H. mutilum is found in: the eastern half of the United States; Washington; California; the British Columbia, Saskatchewan, Ontario and Quebec regions of Canada; Hawaii.[1] It is also found in Central and South America as well as Europe. H. mutilum var. latisepalum is distributed from southeastern South Carolina south to peninsular Florida and west to Texas. As well, H. mutilum var. mutilum is more widespread and is found throughout the normal distribution.[3]
Ecology
Habitat
H. mutilum is found in bogs, fens, marshes, shores, and other wet habitats, and H. mutilum var. latisepalum specifically can be found in marshes and other wet habitats.[3] Specimens have been collected from shallow water of marsh area, moist loamy sand, floodplains, small pond depression, and edge of river. [4] It grows best in partial shade.[5] The USDA Natural Resources Conservation Service lists this plant as a facultative wetland species that most often can be found in wetland habitats, but can also occasionally be found in non-wetland habitats as well.[1] A study on old field succession of abandoned agriculture sites in central New Jersey observed Hypericum mutilum to grow seedlings during the early successional first year of agricultural abandonment[6]
Associated species include Boehmeria sp., Triadenum sp., Carex longii, Eryngium prostratum, Paspalum sp., Chasmanthium sp., and Rhynchospora sp.[4]
Phenology
Generally, H. mutilum flowers from June until October.[3] It has been observed flowering in April through July. [7]
Seed bank and germination
It was found to be in high density at a constructed wetland site on a Delaware River tidal freshwater wetland.[8] Another study found this species as a component of the seed bank at the bay habitat type on the Savannah River Site in South Carolina.[9] Regeneration or germination was found to only occur in nonflooded and exposed substrates rather than flooded substrates at sites on coastal plain pondshores in New York.[10]
Fire ecology
H. mutilum is not fire resistant and has low fire tolerance. [1]
Conservation and Management
This species is considered vulnerable in Quebec, imperiled in Wisconsin, critically imperiled in Nebraska and Prince Edward Island, and an exotic species in British Columbia.[11]
Cultivation and restoration
Photo Gallery
References and notes
- ↑ 1.0 1.1 1.2 1.3 1.4 USDA Plant Database https://plants.usda.gov/core/profile?symbol=HYMU
- ↑ 2.0 2.1 Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
- ↑ 3.0 3.1 3.2 Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
- ↑ 4.0 4.1 URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran C. Anderson, V. Craig, H. Roth, Bill Boothe, marcia Boothe, Leon Neel, R.K. Godfrey, R. Komarek, J.M. Kane, Annie Schmidt. States and counties: Florida (Gadsden, Leon, Liberty, Wakulla) Georgia (Thoms, Grady) South Carolina (Georgetown)
- ↑ [[1]] Lady Bird Johnson Wildflower Center. Accessed: May 28, 2019
- ↑ Leck, M. A. and C. F. Leck (1998). "A ten-year seed bank study of old field succession in central New Jersey." The Journal of the Torrey Botanical Society 125(1): 11-32.
- ↑ Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 22 MAY 2018
- ↑ Leck, M. A. and C. F. Leck (2005). "Vascular plants of a Delaware River tidal freshwater wetland and adjacent terrestrial areas: Seed bank and vegetation comparisons of reference and constructed marshes and annotated species list." Journal of the Torrey Botanical Society 132: 323-354.
- ↑ Poiani, K. A. and P. M. Dixon (1995). "Seed banks of Carolina bays: potential contributions from surrounding landscape vegetation " American Midland Naturalist 134: 140-154
- ↑ Schneider, R. (1994). "The role of hydrologic regime in maintaining rare plant communities of New York's coastal plain pondshores." Biological Conservation 68: 253-260.
- ↑ [[2]] NatureServe Explorer. Accessed: May 28, 2019
