Hypericum myrtifolium

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Hypericum myrtifolium
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Genus: Hypericum
Section: H. sect. Myriandra
Subsection: H. subsect. Brathydium
Species:
H. myrtifolium
Binomial name
Hypericum myrtifolium
Synonyms [2]
  • Brathydium myrtifolium(Lam.) K.Koch
  • Hypericum glaucumMichx.
  • Hypericum rosmarinifoliumChoisy
  • Hypericum sessiliflorumWilld. ex Spreng.
  • Myriandra glauca(Michx.) Spach

Hypericum myrtifolium, the myrtleleaf St. Johnswort, [3] is a species of flowering plant in the St. John's wort family, Hypericaceae. [4] It is endemic to the Southeastern United States. [4] It was first described by Jean-Baptiste Lamarck in 1797. [1]

Contents

Description

Myrtleleaf St. John's wort is a small, erect shrub or subshrub growing up to 1 m (3 ft 3 in) tall. [4] The stems are glaucous and green when young, becoming reddish brown with greyish bark, corky, or peeling in strips as it ages. The sessile, leathery leaves are evergreen, usually glaucous underneath, 8–40 mm (0.31–1.57 in) long and 5–20 mm (0.20–0.79 in) broad, oblong to lanceolate with recurved margins as they dry. The branching flowerheads produce 7–30 flowers in a dichasium arrangement. Each flower grows up to 25 mm (0.98 in) in diameter with 5 persistent sepals, 5 bright yellow petals, and around 200 stamens. [4] It flowers in the late spring to summer (May–July). [5] The ovary is three- or four- parted, separating at the top as it ripens, producing blackish-brown seeds. [4]

Hypericum myrtifolium is distinguished from the similar H. frondosum by its shorter, usually clasping leaves, its broadly branching dichasial flowerheads, and its persistent sepals. [5]

Distribution and habitat

Hypericum myrtifolium occurs in wet pine flatwoods, graminoid bogs, roadside ditches, and other wetland areas with sandy or peaty soils. [4] It is endemic to the coastal plain in the Southeastern United States, found in most of Florida and parts of South Carolina, Georgia, Alabama, and Mississippi. [5]

Related Research Articles

<i>Hypericum tetrapterum</i> Species of flowering plants in the St Johns wort family Hupericaceae

Hypericum tetrapterum is a herbaceous perennial plant species in the flowering plant family Hypericaceae. Its common names include St. Peter's wort, Peterwort, square stemmed St. John's wort, and square stalked St. John's wort.

<i>Hypericum maculatum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum maculatum, commonly known as imperforate St John's-wort, or spotted St. Johnswort, is a species of perennial herbaceous flowering plant in the family Hypericaceae. It is native to Europe and Western Asia where it grows in moist meadows.

<i>Hypericum mutilum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum mutilum is a species of St. John's wort known by the common name dwarf St. John's wort. It is native to parts of North America and is present in other parts as an introduced species. It is an annual or perennial herb taking a multibranched erect form up to about 60 centimeters tall. The oval green leaves are one or two centimeters long and are covered in tiny glands. The inflorescence is a compound cyme of tiny flowers. H. mutilum subsp. mutilum and subsp. boreale have a diploid number of 16, and H. mutilum subsp. boreale can have a diploid number of 18.

<i>Hypericum terrae-firmae</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum terrae-firmae is a woody perennial flowering plant in the St. John's wort family Hypericaceae. It is an endemic plant species of Belize.

<i>Hypericum ascyron</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum ascyron, the great St. Johnswort or giant St. John's wort is a flowering plant in the family Hypericaceae.

Hypericum buckleyi, known as Buckley's St. Johnswort, is a rare species of flowering plant in the family Hypericaceae that is found only in the Appalachian Mountains of the southeastern United States.

<i>Hypericum kalmianum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum kalmianum, commonly called Kalm's St. Johns wort or Kalm's St. Johnswort, is a flowering plant in the St. John's wort family Hypericaceae. It is native to the Great Lakes region in the northern United States and southern Canada. Hypericum kalmianum was named after its discoverer, Swedish botanist Pehr Kalm (1715-1779).

<i>Hypericum hookerianum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum hookerianum, or Hooker's St. John's Wort, is a perennial shrub in the flowering plant family Hypericaceae native to eastern and southern Asia. The specific name hookerianum is named for William Jackson Hooker.

<i>Hypericum canadense</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum canadense, known as Canadian St. Johns-wort, lesser St. John's wort, and lesser Canadian St. Johnswort, is a flowering plant in the genus Hypericum. It is a yellow-flowering annual or perennial herb native to North America and introduced to Ireland and The Netherlands. The specific epithet canadense means "Canadian".

<i>Hypericum prolificum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum prolificum, known as shrubby St. John's wort, is a deciduous shrub in the genus Hypericum. It was named for its "prolific" number of stamens.

<i>Hypericum tenuifolium</i> Species of flowering plant in the St Johns wort family Hypericaceae

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

<i>Hypericum suffruticosum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum suffruticosum, known as pineland St. John's-wort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is native to the Southeastern United States.

Hypericum galioides, the bedstraw St. Johnswort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is endemic to the Southeastern United States.

<i>Hypericum tetrapetalum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum tetrapetalum, the fourpetal St. Johnswort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is found in the Southeastern United States and Cuba. It was first described by Jean-Baptiste Lamarck in 1797.

Hypericum assamicum is a species of flowering plant in the St. John's wort family, Hypericaceae. It is endemic to India. Hypericum assamicum is one of two species of Hypericum in the section Hypericum sect. Sampsonia.

<i>Hypericum virginicum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum virginicum, the marsh St. Johns-wort or Virginia marsh St. Johnswort, is a species of flowering plant in the family Hypericaceae. It is native to the central and eastern United States and eastern Canada.

<i>Hypericum frondosum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum frondosum, the cedarglade St. Johnswort or golden St. John's wort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is native to the central and southeastern United States in dry, rocky habitats.

Hypericum erythreae, the Georgia St. John's-wort, sparse-leaved St. John's-wort, or grit St. Johnswort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is native to the southeastern United States in seepage bogs and roadside ditches. Its name grit St. Johnswort comes from its limited distribution, within the Altamaha Grit region of the Georgia coastal plain.

<i>Hypericum fasciculatum</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum fasciculatum, known as peelbark St. Johnswort or sandweed, is a species of flowering plant in the St. Johnswort family, Hypericaceae, native to the southeastern United States. It is found from eastern North Carolina, south to southern Florida, west to eastern Louisiana. Kew's Plants of the World Online database also notes that it occurs in Cuba, though Cuba is not listed in several other sources. It was first described in 1797 by Jean-Baptiste Lamarck.

References

  1. 1 2 "Hypericum myrtifolium Lam". ipni.org. International Plant Names Index. Retrieved 2018-11-06.
  2. ↑ "Hypericum myrtifolium Lam". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-11-06.
  3. ↑ USDA, NRCS (n.d.). "Hypericum myrtifolium". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2018-11-06.
  4. 1 2 3 4 5 6 "Hypericum myrtifolium Lam. Descriptions". hypericum.myspecies.info. Retrieved 2018-11-06.
  5. 1 2 3 Robson, Norman K. B. (2015). "Hypericum myrtifolium". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 6. New York and Oxford. Retrieved 2018-11-06– via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
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