Heracleum sphondylium

Heracleum sphondylium, commonly known as hogweed, common hogweed or cow parsnip, is a herbaceous perennial or biennial plant, in the umbelliferous family Apiaceae that includes fennel, cow parsley, ground elder and giant hogweed. It is native to Europe and Asia. The common name eltrot may also be applied, but is not specific to this species.[2] Umbelliferous plants are so named because of the umbrella-like arrangement of flowers they produce. The North American species Heracleum maximum (also called cow parsnip) is sometimes included as a subspecies of H. sphondylium.

Heracleum sphondylium
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Apiales
Family:
Apiaceae
Genus:
Heracleum
Species:
H. sphondylium
Binomial name
Heracleum sphondylium
Synonyms[1]
  • Heracleum australe Hartm.
  • Heracleum sphondylium sphondylium

The plant provides a great deal of nectar for pollinators. It was rated in the top 10 for most nectar production (nectar per unit cover per year) in a UK plants survey conducted by the AgriLand project which is supported by the UK Insect Pollinators Initiative.[3]

Etymology

The species name sphondylium, meaning "vertebrate", refers to the shape of the segmented stem. It was described by Carl Linnaeus in 1753.[4]

Description
Close-up of H. sphondylium flowers

Heracleum sphondylium reaches on average 50–120 centimetres (20–47 in) of height, with a maximum of 2 metres (6 ft 7 in). The hollow, ridged stem with bristly hairs arises from a large tap root. The leaves can reach 50 centimetres (20 in) of length. They are once or twice pinnate, hairy and serrated,[5]:827 divided into 3–5 lobed segments.

Hogweed has 5-petalled pinkish or white flowers, arranged in umbels usually less than 30 cm of diameter[5] with 15 to 30 rays. The peripheral flowers have a radial symmetry (zygomorphic). The terminal umbels are flat-topped and the outermost petals are enlarged.[6] Flowering typically occurs between June and October.

Drawing of Heracleum sphondylium, showing the heart-shaped schizocarp (fruit)

The flowers are pollinated by insects, such as beetles, wasps and especially flies.[7] The small fruits are schizocarps, flattened[6] and winged, elliptical to rounded and glabrous, up to 1 cm long. The seed dispersal is by wind (anemochory).

The characteristic pig-like smell of the flowers gives it its name. The leaves are commonly mined by the larvae of the leaf miner Phytomyza spondylii.[8]

H. sphondylium is smaller than dangerous Heracleum mantegazzianum (giant hogweed) and Heracleum sosnowskyi (Sosnowsky's hogweed), and should not be confused. However, it contains some of the same phytophototoxic compounds (furanocoumarins), albeit at lower concentrations,[9] and there is evidence that the sap from common hogweed can also produce phytophotodermatitis (burns and rashes) when contaminated skin is exposed to sunlight.[10] Care therefore needs to be used when cutting or trimming it, to prevent 'strimmers rash'.

The small picture-winged fly Euleia heraclei is, as its name suggests, found on hogweed.[11]

Distribution

H. sphondylium has an Eurasian distribution, growing throughout Europe and eastwards to central Asia. Its native range just extends into North Africa.[12] The species has been introduced to suitable habitats elsewhere, such as Canada and the U.S.[13][14] In particular, H. sphondylium is recorded as introduced to Ontario by the Database of Vascular Plants of Canada[15] but reports of H. sphondylium in Canada are rare.[16].

Habitat

The plant is common in grassland, herb-rich meadows, in hedges, meadows and woods, road verges and railway embankments, waste and cultivated ground.[17]:180[6] It prefers moist, nitrogen-rich soils. It can occur in mountain areas up to 2,500 m (8,200 ft) of altitude.

Uses

In the 18th century, people on the Kamchatka Peninsula distilled a spirit called raka from a "sweet grass" that was most likely H. sphondylium.[18][19] The raka was flavored with blue-berried honeysuckle (Lonicera caerulea).

Borscht derives from an ancient soup originally cooked from pickled stems, leaves and umbels of common hogweed. The young shoots are considered excellent eating by many foragers.

In eastern European countries and especially Romania, H. sphondylium is used as an aphrodisiac and to treat gynecological and fertility problems and impotence. It is also sometimes recommended for epilepsy. However, there are no clinical studies to prove its efficacy at treating any of these problems.

The seeds can be dried and used as a spice, with a flavour similar to that of cardamom.

Subspecies

This species has variable characteristics and many forms have been described. The following names are accepted by The Plant List:[1]

  • H. sphondylium var. akasimontanum (Koidz.) H. Ohba
  • H. sphondylium subsp. algeriense (Coss. ex Batt. & Trab.) Dobignard
  • H. sphondylium subsp. alpinum (L.) Bonnier & Layens
  • H. sphondylium subsp. aurasiacum (Maire) Dobignard
  • H. sphondylium subsp. embergeri Maire
  • H. sphondylium subsp. granatense (Boiss.) Briq.
  • H. sphondylium var. lanatum (Michx.) Dorn
  • H. sphondylium subsp. montanum (Schleich. ex Gaudin) Briq. (synonyms:[20][21] Heracleum lanatum, Heracleum maximum)
  • H. sphondylium var. nipponicum (Kitag.) H. Ohba
  • H. sphondylium subsp. orsinii (Guss.) H.Neumayer
  • H. sphondylium subsp. pyrenaicum (Lam.) Bonnier & Layens
  • H. sphondylium subsp. sibiricum (L.) Simonk.
  • H. sphondylium subsp. suaveolens (Litard. & Maire) Dobignard
  • H. sphondylium subsp. ternatum (Velen.) Brummitt
  • H. sphondylium subsp. transsilvanicum (Schur) Brummitt
  • H. sphondylium subsp. trifoliolatum (Blanch.) Kerguélen
  • H. sphondylium var. tsaurugisanense (Honda) H. Ohba
  • H. sphondylium subsp. verticillatum (Pančić) Brummitt

Similar species

The water parsnip (Sium suave), western water hemlock (Cicuta douglasii) and spotted water hemlock (Cicuta maculata) all have white flowers in large compound umbels, which can lead to misidentification. All water hemlock and poison hemlock are highly poisonous,[22] but water parsnip is not.[23] Both have clusters of small white flowers shaped like umbrellas, and have the same habitat near the shore line of lakes and rivers. Water parsnip has leaves only once compound, and water hemlock has leaves which are three times compound. Water hemlock has a large swelling at the stem base, and has bracts at the base of each small flower cluster, not at the base of the main flower head.[24] The water parsnip has small bracts at the base of flowers and main flower head as well.[25] The cow parsnips (Heracleum lanatum, Heracleum maximum) are also confused in this group with similar flower groupings. However, the cow parsnips have large, broad leaves, and an unpleasant odour.[26]

See also

References
  1. "Heracleum sphondylium L.". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew. Retrieved September 19, 2018 – via The Plant List.
  2. "Heracleum sphondylium". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 14 May 2015.
  3. "Which flowers are the best source of nectar?". Conservation Grade. 2014-10-15. Retrieved 2017-10-18.
  4. "Heracleum L.". Tropicos. Missouri Botanical Garden. Retrieved 22 September 2018.
  5. Stace, C. A. (2010). New Flora of the British Isles (Third ed.). Cambridge, U.K.: Cambridge University Press. ISBN 9780521707725.
  6. Parnell, J. and Curtis, Y. 2012. Webb's An Irish Flora. Cork University Press. ISBN 978-185918-4783
  7. Van Der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G.; Elzenga, J. T. M. (2015). "Competition for pollinators and intra-communal spectral dissimilarity of flowers". Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.
  8. "Phytomyza spondylii Robineau-Desvoidy, 1851". British Leaf Miners. Retrieved 2019-11-02.
  9. Pathak, M.A.; Daniels, Farrington; Fitzpatrick, T.B. (1962). "Journal of Investigative Dermatology". 39 (3): 225–239. doi:10.1038/jid.1962.106. PMID 13941836. Cite journal requires |journal= (help)
  10. Bowers, A.G. (1999). "American Journal of Contact Dermatitis". 10 (2): 89–93. doi:10.1016/S1046-199X(99)90006-4. Cite journal requires |journal= (help)
  11. Euleia heraclei Retrieved 18 May 2012
  12. Arne Anderberg. "Den Virtuella Floran: Heracleum sphondylium L." Naturhistoriska riksmuseet. Retrieved 20 September 2018.
  13. Kartesz, J.T. "Taxon Maps for the Genus Heracleum". North American Plant Atlas. The Biota of North America Program (BONAP). Retrieved August 14, 2018.
  14. "Heracleum sphondylium (European cow-parsnip)". New England Wild Flower Society. Retrieved August 14, 2018.
  15. "Heracleum sphondylium Linnaeus". Canadensys. Retrieved September 25, 2018.
  16. MacDonald, Francine; Anderson, Hayley (May 2012). "Giant Hogweed (Heracleum mantegazzianum): Best Management Practices in Ontario" (PDF). Ontario Invasive Plant Council, Peterborough, ON. Retrieved September 19, 2018.
  17. Blamey, M.; Fitter, R.; Fitter, A (2003). Wild flowers of Britain and Ireland: The Complete Guide to the British and Irish Flora. London: A & C Black. ISBN 978-1408179505.
  18. Anderson, Heather Arndt (15 April 2018). Berries: A Global History. Reaktion Books. ISBN 9781780239385.
  19. Hedrick (editor), U. P. (1972). Sturtevant's Edible Plants of the World. New York: Dover. p. 301. Retrieved 2 October 2018.CS1 maint: extra text: authors list (link)
  20. "Heracleum sphondylium ssp. montanum (Schleich. ex Gaudin) Briq". Integrated Taxonomic Information System. Retrieved September 21, 2018.
  21. "Taxon: Heracleum sphondylium L. subsp. montanum (Schleich. ex Gaudin) Briq". Germplasm Resources Information Network. United States Department of Agriculture, Agricultural Research Service. Retrieved September 21, 2018.
  22. "Cicuta maculata". Archived from the original on 2006-09-27. Retrieved 2008-08-03.
  23. Kuhnlein, Harriet V; Turner, Nancy J. (1991). Traditional Plant Foods of Canadian Indigenous Peoples. Taylor & Francis. ISBN 978-2-88124-465-0. Retrieved 2008-08-03.
  24. "Western Water Hemlock – Agriculture – Government of Saskatchewan". Archived from the original on 2008-10-08. Retrieved 2008-08-03.
  25. "Water Parsnip – Agriculture – Government of Saskatchewan". Archived from the original on 2008-10-08. Retrieved 2008-08-03.
  26. "Heracleum lanatum". University of Saskatchewan. Retrieved 2008-08-03.
  • Pignatti S. - Flora d'Italia – Edagricole – 1982, Vol. II, pag. 237
  • Tutin, T. G. & al. (ed.) (1968). Flora Europaea. (vol.2) Cambridge University Press, Cambridge. [p. 365]
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