title: Hypericum gramineum
text: # Hypericum gramineum
  
  Hypericum gramineum, commonly known as small St. John's wort or grassy St. Johnswort, is species of flowering plant in the St. Johns wort family Hypericaceae. It is found in parts of Southeast Asia, Oceania, and the Pacific.
  
  ## Description
  
  Grassy St. Johnswort is a small annual or perennial herb with a height of 5–72 cm (2.0–28.3 in). Its flowers are 5–12 mm in diameter. The plant causes photosensitization and enteritis.
  
  ## Distribution and habitat
  
  Hypericum gramineum occurs in New Zealand, Australia, New Caledonia, Papua-New Guinea, Vietnam, Taiwan, China (Hainan, Yunnan), India (Meghalaya, Manipur), Bhutan, and the United States (Hawaii). It is found in every state and territory of Australia. It grows in open grassy and shrubby habitats.
  
  ## Reference list
  
  * ↑ "Hypericum gramineum". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-10-23.
  * 1 2 Willis, AJ; Groves, RH; Ash, JE (1997). "Seed Ecology of Hypericum gramineum, an Australian Forb". Australian Journal of Botany. 45 (6): 1009–1022. doi:10.1071/BT96074.
  * 1 2 3 4 "Hypericum gramineum G.Forst". hypericum.myspecies.info. Retrieved 2018-10-23.
  * ↑ Miller, C (1990). "Hypericum gramineum G.Forst". PlantNet. National Herbarium of NSW, Royal Botanic Garden. Retrieved 9 August 2014.
  * ↑ F.A.Zich; B.P.M.Hyland; T.Whiffen; R.A.Kerrigan (2020). "Hypericum gramineum". Australian Tropical Rainforest Plants Edition 8 (RFK8). Centre for Australian National Biodiversity Research (CANBR), Australian Government. Retrieved 23 June 2021.
  
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