Paris quadrifolia

Paris quadrifolia, the herb-paris[3] or true lover's knot, is a species of flowering plant in the family Melanthiaceae. It occurs in temperate and cool areas throughout Eurasia, from Spain to Yakutia, and from Iceland to Mongolia.[1] It prefers calcareous soils and lives in damp and shady places, especially old established woods and stream banks.

This article is about the plant species Paris quadrifolia. For other uses, see Paris (disambiguation).

Paris quadrifolia
Specimen near Vinnytsia, Ukraine
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Liliales
Family: Melanthiaceae
Genus: Paris
Species:
P. quadrifolia
Binomial name
Paris quadrifolia
Synonyms[1]
  • Paris pentafolia P.Renault
  • Paris trifolia P.Renault
  • Paris quadrifolia var. angustiovata D.Z.Ma & H.L.Liu
1885 illustration[2]

P. quadrifolia is in decline in Europe due to loss of habitat.[4] In Iceland, for example, it is on the red list.[5]

Characteristics

P. quadrifolia is a perennial herbaceous plant that is 25 to 40 cm (10 to 15.5 in) tall. It may have 3–8 leaves but typically there are four leaves arranged as opposing pairs. The flowers are wispy and inconspicuous.[4][6]

The plant flowers during the months of June and July.[7] It has a solitary flower with four narrow greenish filiform (threadlike) petals, four green petaloid sepals, eight golden yellow stamens, and a round purple to red ovary. The flower is borne above a single whorl of four leaves.

Each plant produces at most one blueberry-like berry, which is poisonous, as are other plant tissues.[8] Poisonings are rare because the plant's solitary berry has a repulsive taste that makes it difficult to mistake for a bilberry.

  • Herb Paris with Fruit
  • Typical Herb Paris woodland habitat in Ayrshire, Scotland.
  • Fruit
  • Details of the leaves.
  • Typical limestone (cornstone) based woodlands rich in Herb Paris colonies.

References
  1. "Paris quadrifolia". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. Prof. Dr. Otto Wilhelm Thomé Flora von Deutschland, Österreich und der Schweiz 1885, Gera, Germany
  3. "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2014-10-23. Retrieved 2014-10-17.
  4. "Paris quadrifolia". Plants of the World Online. Retrieved 21 October 2019.
  5. "Red List for Vascular Plants". Icelandic Institute Of Natural History. Retrieved 21 October 2019.
  6. "Paris quadrifolia". Flora of China. 24 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  7. Altervista Flora Italiana, Uva di volpe Paris quadrifolia L.
  8. Jacquemyn, Hans; Brys, Rein; Hutchings, Michael J. (July 2008), "Biological Flora of the British Isles: Paris quadrifolia L.", Journal of Ecology, 96 (4): 833–844, doi:10.1111/j.1365-2745.2008.01397.x
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