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Pentanema squarrosum

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Species of flowering plant in the daisy family Asteraceae

Pentanema squarrosum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Pentanema
Species: P. squarrosum
Binomial name
Pentanema squarrosum
(L.) D.Gut.Larr., Santos-Vicente, Anderb., E.Rico & M.M.Mart.Ort.
Synonyms
  • Aster conyzae Griess.
  • Conyza squarrosa L.
  • Conyza vulgaris Lam.
  • Helenium vulgare Kuntze
  • Inula conyza DC.
  • Inula conyzae (Griess.) Meikle
  • Inula foetida Dulac
  • Inula squarrosa Bernh. ex DC.
  • Inula vulgaris Trevis.
  • Jacobaea canzya (DC.) Merino
  • Inula suaveolens Jacq.
  • Pentanema conyzae (Griess.) D.Gut.Larr., Santos-Vicente, Anderb., E.Rico & M.M.Mart.Ort.

Pentanema squarrosum, known as ploughman's-spikenard, is a species of plant in the family Asteraceae found in Europe, North Africa, and the Near East.

It is a tall, hairy plant (to 1.2 m) that grows on calcareous, low-nutrient, well-drained soils. It is a short lived perennial plant. Before flowering, the basal rosette of leaves resembles those of foxgloves. It flowers after mid-summer in Europe, from July to September. When in flower, the plant has many small flowerheads grouped together into a flat-topped structure that resembles a single flowerhead (pseudanthium). The individual flowerheads have prominent yellow disc florets and no (or inconspicuous) ray florets.

The leaves are burned and used as an insecticide and parasiticide, especially against fleas. Even the smell of the plant is flea repellent. When the root is burned, it becomes a useful room scent (it is used this way in Turkey).

References

  1. BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  2. "Pentanema squarrosum (L.) D.Gut.Larr., Santos-Vicente, Anderb., E.Rico & M.M.Mart.Ort. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2022-07-03.
  3. ^ Altervista Flora Italiana, Inula conyzae (Griess.) DC. includes photos and European distribution map
  4. "Ploughman's-spikenard - Inula conyzae". NatureSpot. Retrieved 7 August 2022.
  5. Doğan, Hüseyin (16 September 2019). "Pentanema squarrosum (Gölge andızotu)". Kocaeli Bitkileri (in Turkish).


External links

Taxon identifiers
Inula conyzae
Inula conyzae
Conyza squarrosa
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