Lepidium didymum

Lepidium didymum
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Lepidium
Species: L. didymum
Binomial name
Lepidium didymum
L.[1]

Lepidium didymum, synonym Coronopus didymus,[2] the lesser swine-cress,[3] is a species of flowering plant in the cabbage and mustard family Brassicaceae.

Description

Lepidium didymum is an annual or biennial herb[4] with decumbent or ascending and glabrous green stems, up to 40 centimetres (16 in) long, radiating from a central position. The leaves are pinnate and alternate, and can reach a length of 5 cm (2 in). The flowers are inconspicuous, the four white petals very short or absent, with 2 (rarely 4)[5]:54 stamens and the fruits consist of two rounded valves, notched at the apex, with a very short style between.[6]:405 It flowers between July and September.[5]:54

Distribution

Lepidium didymum is of uncertain origin,[4] but is often cited as native to South America.[6][5] It has been introduced elsewhere as a weed of cultivation. In Britain it had been recorded from the wild by 1778,[4] chiefly in England and the south of Ireland,[7] growing on cultivated and waste ground, in gardens and lawns, by paths and roadsides.

References

  1. ↑ "Lepidium didymum". The Plant List. Retrieved 2016-07-15.
  2. ↑ "Coronopus didymus". The Plant List. Retrieved 2016-07-15.
  3. ↑ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17.
  4. 1 2 3 "Online Atlas of the British & Irish flora: Coronopus didymus (Lesser swine cress)". London, U.K.: Biological Records Centre and Botanical Society of Britain and Ireland. Retrieved 15 July 2016.
  5. 1 2 3 Clapham, A.R.; Tutin, T.G.; Warburg, E.F. (1981). Excursion Flora of the British Isles (Third ed.). Cambridge University Press. ISBN 0521232902.
  6. 1 2 Stace, C.A. (2010). New flora of the British Isles (Third ed.). Cambridge, U.K.: Cambridge University Press. ISBN 9780521707725.
  7. ↑ "BSBI Distribution maps:Lepidium didymum". London, U.K.: Botanical Society of Britain and Ireland. Retrieved 15 July 2016.
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