Biology:Hypericum tenuifolium

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Short description: Species of flowering plant in the St John's wort family Hypericaceae


Hypericum tenuifolium
Hypericum tenuifolium.png
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Genus: Hypericum
Section: H. sect. Myriandra
Subsection: H. subsect. Centrosperma
Species:
H. tenuifolium
Binomial name
Hypericum tenuifolium
Synonyms[2]
  • Svenson Walter
  • (Svenson) P.B.Adams Hypericum fasciculatum var. laxifolium
  • Hypericum coris Choisy
  • Hypericum galioides var. reductum Hypericum reductum

Hypericum tenuifolium, known as Atlantic St. John's-wort[3] and sandhill St. John's-wort,[4] is a species of flowering plant in the St. John's wort family, Hypericaceae. It is native to the Southeastern United States.[5]

Description

Atlantic St. John's-wort is a small, spreading shrub, growing 10–50 cm (3.9–19.7 in) tall and forming mats.[5][6] The leaves are very narrow, hence its name tenuifolium (from la tenuis 'thin', and folium 'leaf'), and are only 0.4–0.8 mm (0.016–0.031 in) broad and 4–11 mm (1838 in) long, with rounded tips and revolute margins. The flowerheads are narrowly cylindric, producing 1-7 flowers. Each flower is 10–14 mm (3812 in) broad with 5 sepals, 5 bright yellow petals, and 50-90 stamens. The ovaries are three-parted, forming cylindric capsule fruits. It flowers in the summer, typically June through September, but sometimes as late as December.[4]

Distribution and habitat

Hypericum tenuifolium occurs in the Atlantic coastal plain in the southeastern United States, in Alabama, Florida, Georgia, North Carolina, and South Carolina.[5] Its habitat includes dry, open, sandy areas such as pine flatwoods, pine savannas, and sandhills.[5][4]

References

  1. "Hypericum tenuifolium Pursh". International Plant Names Index. http://beta.ipni.org/n/433901-1. 
  2. "Hypericum tenuifolium Pursh". Royal Botanical Gardens Kew. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:433901-1. 
  3. "Hypericum tenuifolium". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=HYTE11. Retrieved 2018-10-13. 
  4. 4.0 4.1 4.2 Weakley, Alan S. (2018), Flora of the Southern and Mid-Atlantic States, working draft of 20 August 2018, University of North Carolina Herbarium, North Carolina Botanical Garden, University of North Carolina at Chapel Hill 
  5. 5.0 5.1 5.2 5.3 Robson, Norman K. B. (2015), "Hypericum tenuifolium", in Flora of North America Editorial Committee, Flora of North America North of Mexico (FNA), 6, New York and Oxford, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250100848, retrieved 2018-10-13 
  6. "Hypericum tenuifolium". http://hypericum.myspecies.info/taxonomy/term/942. 

Wikidata ☰ Q21275377 entry