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Hypericum gentianoides

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

Hypericum gentianoides
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Hypericaceae
Genus: Hypericum
Section: H. sect. Brathys
Species: H. gentianoides
Binomial name
Hypericum gentianoides
(L.) Britton, Sterns & Poggenb.
Synonyms

Sarothra gentianoides L.

Hypericum gentianoides is a species of flowering plant in the St. John's wort family Hypericaceae. Its common names include orangegrass and pineweed.

Native to eastern North America, it ranges from Ontario; Nova Scotia and Maine south to Florida, west to Texas, and north to Missouri and Minnesota.

It is an annual herb typically growing 10–40 cm tall. The leaves are repressed against the stem, 1-3mm long, and scale-like; an adaptation to reduce transpiration in exposed environments. The flowers are no more than 3mm across, with five to ten stamens, and three styles. It commonly grows in nutrient poor soil, sand, and on exposed sites, but is also known to occur in wetter areas such as coastal plain marshes. The name orangegrass refers to the citrus smell that is released when it is crushed. Chemical extracts of H. gentianoides have been found to inhibit the contraction of HIV.

References

  1. "Lady Bird Johnson Wildflower Center - the University of Texas at Austin". wildflower.org. Retrieved 2023-12-29.
  2. "BONAP's Map".
  3. Thoday, D. (1931). "The Significance of Reduction in the Size of Leaves". Journal of Ecology. 19 (2): 297–303. Bibcode:1931JEcol..19..297T. doi:10.2307/2255823. JSTOR 2255823.
  4. "US Wildflower - Pineweed, Orangegrass - Hypericum gentianoides". USWildflowers.com. Retrieved November 21, 2022.
  5. ^ "Hypericum gentianoides (L.) B.S.P." (PDF). Michigan Natural Features Inventory. Retrieved November 21, 2022.
  6. "Hypericum gentianoides (Orange-grass St. John's-wort): Go Botany".
  7. Hillwig, Matthew (January 2008). "DSpace Angular Universal".
Taxon identifiers
Hypericum gentianoides
Sarothra gentianoides


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