Hypericum mutilum

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Common name: dwarf St. Johnswort [1]

Hypericum mutilum
Hypericum mutilum BM.jpg
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
HYPE MUTI DIST.JPG
Natural range of Hypericum mutilum from USDA NRCS Plants Database.

Taxonomic Notes

Synonyms: Hypericum mutilum L. ssp. latisepalum (Fernald) N. Robson; Hypericum mutilum L. ssp. mutilum

Varieties: Hypericum mutilum L. var. latisepalum Fernald; Hypericum mutilum L. var. mutilum

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.[2]

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.[2] Specimens have been collected from shallow water of marsh area, moist loamy sand, floodplains, small pond depression, and edge of river. [3] It grows best in partial shade.[4] 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]

Phenology

Generally, H. mutilum flowers from June until October.[2] It has been observed flowering in April through July. [5]

Fire ecology

H. mutilum is not fire resistant and has low fire tolerance. [1]

Conservation and Management

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 USDA Plant Database https://plants.usda.gov/core/profile?symbol=HYMU
  2. 2.0 2.1 2.2 Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  3. 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)
  4. [[1]] Lady Bird Johnson Wildflower Center. Accessed: May 28, 2019
  5. 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