Cochlearia
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Cochlearia (scurvy-grass or spoonwort) is a genus of about 30 species of annual and perennial herbs in the family Brassicaceae. They are widely distributed in temperate and arctic areas of the northern hemisphere, most commonly found in coastal regions, on cliff-tops and salt marshes where their high tolerance of salt enables them to avoid competition from larger, but less salt-tolerant plants; they also occur in alpine habitats in mountains and tundra.
They form low, rounded or creeping plants, typically 5–20 cm tall. The leaves are smoothly rounded, roughly spoon-shaped (the scientific name Cochlearia derives from the Latinized form, cocleare, of the Greek κοχλιάριον, kokhliárion, a spoon; this a diminutive of κόχλος, kókhlos, seashell), or in some species, lobed; typically 1–5 cm long, and with a fleshy texture. The flowers are white with four petals and are borne in short racemes.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>Template:Cite journal</ref><ref>Template:Cite news</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Selected speciesEdit
About 30 species are usually accepted; several others usually treated as subspecies of C. officinalis are accepted as distinct species by some botanists.
- Cochlearia acutangula
- Cochlearia aestuaria – Estuarine scurvy-grass
- Cochlearia alatipes
- Cochlearia anglica – English scurvy-grass
- Cochlearia aragonensis
- Cochlearia changhuaensis
- Cochlearia cyclocarpa – Roundfruit scurvy-grass
- Cochlearia danica – Early or Danish scurvy-grass
- Cochlearia fenestrata – Arctic scurvy-grass
- Cochlearia formosana
- Cochlearia excelsa
- Cochlearia fumarioides
- Cochlearia furcatopilosa
- Cochlearia glastifolia
- Cochlearia groenlandica – Greenland scurvy-grass
- Cochlearia henryi
- Cochlearia hui
- Cochlearia lichuanensis
- Cochlearia longistyla
- Cochlearia megalosperma
- Cochlearia microcarpa
- Cochlearia oblongifolia – East Asian scurvy-grass
- Cochlearia officinalis – Common scurvy-grass (including C. excelsa, C. pyrenaica, C. scotica)<ref>{{#invoke:citation/CS1|citation
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- Cochlearia paradoxa
- Cochlearia rivulorum
- Cochlearia rupicola
- Cochlearia sessilifolia – Sessile-leaved or Alaskan scurvy-grass
- Cochlearia sinuata
- Cochlearia tatrae
- Cochlearia tridactylites – Three-fingered scurvy-grass
- Cochlearia warburgii
Two species formerly included in the genus Cochlearia are now usually treated in separate genera:
- Horseradish Armoracia rusticana (previously Cochlearia armoracia)
- Wasabi Wasabia japonica (previously Cochlearia wasabi)
Cook's scurvy grass, Lepidium oleraceum, was used by James Cook to prevent scurvy, but is now almost extinct.
History and usesEdit
Scurvy-grass is edible raw and cooked, with a flavour similar to cress.<ref>Template:Cite book</ref> The leaves are rich in vitamin C,<ref name="Packer">Template:Cite book</ref><ref name="Brickley">Template:Cite book</ref> which cures scurvy, a deficiency disease resulting from a lack of fresh vegetables in the diet.<ref name="Distillations">Template:Cite journal</ref> The plant was frequently eaten in the past by sailors suffering from scurvy after returning from long voyages.<ref>Template:Cite news</ref><ref name="Blencowe" /> The first-century writer Pliny the Elder (A.D. 23–79) writes in his Naturalis Historia (Natural History) about a disease suffered by Roman soldiers in Germany. Their symptoms resemble those of scurvy, and Pliny recommends a Herba britannica, which has been suggested to be scurvy-grass.<ref name="Klenner">Template:Cite book</ref><ref name="Brickley"/>
The Rev. George Moore recorded the purchase of "a pint of scurvey-grasse" for 1 s in 1662. He apparently "suffered much" from scurvy, purchasing scurvey-grasse in both bundled and bottled form.<ref name="Blencowe" /> The book Cochlearia curiosa: or the curiosities of scurvygrass was published in English in 1676,<ref name="Moellenbrock">Template:Cite book</ref> Described as "both a learned and accurate work", it was well received,<ref name="Kenny">Template:Cite book</ref> and apparently brought scurvy-grass "into great repute" as a remedy.<ref name="Blencowe">Template:Cite journal</ref> According to the Royal Society, the book contains "not only a description of the several kinds of this plant, with its several names, place, and time of growth, temperature and general vertues, but also an enumeration of the uses, medicinal vertues and manner of applying each part of this plant."<ref name="Accompt">Template:Cite journal</ref> In 1857, Cochlearia officinalis was described in The Elements of Materia Medica and Therapeutics as "A gentle stimulant, aperient, and diuretic. It has long been esteemed as an antiscorbutic. It has also been used in visceral obstructions. It is occasionally eaten with bread and butter, like the water-cress."<ref name="Pereira">Template:Cite book</ref>
The leaves, which have a strong acrid, bitter, or peppery taste similar to the related horseradish and watercress, are also sometimes used in salads or eaten with bread and butter.<ref name="Pereira"/>
Scurvy-grass sorrel (Oxalis enneaphylla) is an unrelated plant from southern South America and the Falkland Islands that was also used to treat scurvy.
Scurvy-grass and roadsEdit
The advent of modern fast roads treated with salt in winter for ice clearance has resulted in the colonisation by scurvy-grass of many inland areas where it formerly did not occur. The scurvy-grass seeds become trapped on car wheels, transported often for a considerable distance, and then washed off, to grow in the salt-rich soil at the side of the road where other plants cannot survive.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
- Scurvygras.jpg
Cochlearia officinalis on Bear Island, Norway
- Cochlearia officinalis - Köhler–s Medizinal-Pflanzen-186.jpg
19th century illustration of Cochlearia officinalis
- B1041668 007 Scurvy-grass.tif
"Scurvy-grass" from The Book of Health, 1898, by Henry Munson Lyman