Hypericum tenuifolium
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]
Hypericum tenuifolium | |
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Scientific 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] | |
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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
- "Hypericum tenuifolium Pursh". ipni.org. International Plant Names Index. Retrieved 2018-10-13.
- "Hypericum tenuifolium Pursh". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-10-13.
- "Hypericum tenuifolium". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 2018-10-13.
- 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
- Robson, Norman K. B. (2015). "Hypericum tenuifolium". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 6. New York and Oxford. Retrieved 2018-10-13 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- "Hypericum tenuifolium". hypericum.myspecies.info. Retrieved 2018-10-13.