Hypericum denticulatum

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Common name: coppery St. Johnswort

Hypericum denticulatum
Hypericum denticulatum NRCS.jpg
Photo by Robert H. Mohlenbrock[1]
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicots
Order: Theales
Family: Clasiaceae
Genus: Hypericum
Species: H. denticulatum
Binomial name
Hypericum denticulatum
Walter
HYPE DENT DIST.JPG
Natural range of Hypericum denticulatum from USDA NRCS Plants Database.

Taxonomic Notes

Synonyms: none

Varieties: none

Description

Also known as the coppery St. Johnswort, H. denticulatum is a native perennial forb that is a member of the Clusiaceae family. [2].

Distribution

H. denticulatum is found sparsely across the eastern United States, ranging from Alabama to southern Indiana and some counties in New Jersey and New York. [2].

Ecology

Habitat

This St. John's Wort can be found in savannas, wet pine flatwoods, adjacent ditches, blackwater stream shores, and borrow scapes. [3] It is restricted to pond-shores communities, and is usually seen in low water years. [4] More specifically, H. denticulatum can be found in habitats ranging from dry loamy sand in pine flatwoods, open shores of ponds, upland slopes of pine woodlands, sides of ditches, and pipeline easements. [5]

Associated species - Boltonia spp., Lycopus spp., Hypericum stans [5]

Phenology

H. denticulatum has been observed flowering from July until September. [6], but it has been observed to flower in October as well. Fruit development occurs from July through October. [5]

Conservation and Management

H. denticulatum is listed as threatened by the state of Indiana, listed as endangered by the states of Maryland, New York, and Ohio, and listed as extirpated by the state of Pennsylvania. [2].

Cultivation and restoration

Photo Gallery

References and notes

  1. Robert H. Mohlenbrock, hosted by the USDA-NRCS PLANTS Database / USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester.
  2. 2.0 2.1 2.2 USDA Plants Database URL: https://plants.usda.gov/core/profile?symbol=HYDE2
  3. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  4. Zaremba, R. E. and E. E. Lamont (1993). "The status of the coastal plain pondshore community in New York." Bulletin of the Torrey Botanical Club 120(2): 180-187.
  5. 5.0 5.1 5.2 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Debbie Milonski, R. K. Godfrey, Gary R. Knight, Leon Neel, David H. Webb, R. Komarek, Loran C. Anderson, J. B. Nelson, and Albert B. Pittman. States and counties: Florida: Walton, Escambia, Santa Rosa, and Jackson. Georgia: Grady, Turner, and Thomas. Kentucky: Calloway. South Carolina: Clarendon.
  6. 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