Hypericum tenuifolium
Scientific classification Edit this classification
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]
  • Hypericum coris Walter
  • Hypericum fasciculatum var. laxifolium Choisy
  • Hypericum galioides var. reductum Svenson
  • Hypericum reductum (Svenson) P.B.Adams

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 Latin tenuis 'thin', and folium 'leaf'), and are only 0.4–0.8 mm (0.016–0.031 in) broad and 4–11 mm (1⁄8–3⁄8 in) long, with rounded tips and revolute margins. The flowerheads are narrowly cylindric, producing 1-7 flowers. Each flower is 10–14 mm (3⁄8–1⁄2 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". ipni.org. International Plant Names Index. Retrieved 2018-10-13.
  2. ↑ "Hypericum tenuifolium Pursh". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-10-13.
  3. ↑ USDA, NRCS (n.d.). "Hypericum tenuifolium". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2018-10-13.
  4. 1 2 3 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. 1 2 3 4 Robson, Norman K. B. (2015). "Hypericum tenuifolium". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 6. New York and Oxford: Oxford University Press. Retrieved 2018-10-13 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. ↑ "Hypericum tenuifolium". hypericum.myspecies.info. Retrieved 2018-10-13.
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