''Pringlea antiscorbutica'', commonly known as Kerguelen cabbage, is a

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

and the sole member of the

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

genus ''Pringlea'' in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Brassicaceae Brassicaceae () or (the older but equally valid) Cruciferae () is a medium-sized and economically important Family (biology), family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous pla ...

. Its common name comes from the

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands. An archipelago may be in an ocean, a sea, or a smaller body of water. Example archipelagos include the Aegean Islands (the o ...

of its discovery, the

Kerguelen Islands The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the subantarctic, sub-Antarctic region. They are among the Extremes on Earth#Remoteness, most i ...

, and its

generic Generic or generics may refer to: In business * Generic term, a common name used for a range or class of similar things not protected by trademark * Generic brand, a brand for a product that does not have an associated brand or trademark, other ...

name derives from Sir John Pringle, president of the

Royal Society The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...

at the time of its discovery by Captain

James Cook Captain (Royal Navy), Captain James Cook (7 November 1728 – 14 February 1779) was a British Royal Navy officer, explorer, and cartographer famous for his three voyages of exploration to the Pacific and Southern Oceans, conducted between 176 ...

's Surgeon,

William Anderson William Anderson may refer to: Arts and entertainment * William Anderson (artist) (1757–1837), painter of marine and historical paintings * William Anderson (theatre) (1868–1940), Australian stage entrepreneur * William Anderson (1911–1986 ...

in 1776. Despite its appearance and edibility, it is not related to the common broadleaf plantain.

Description

''Pringlea antiscorbutica'' has leaf rosettes of up to 45 cm in diameter, that sit on top of perennial half woody stems of about 15 cm thick and up to 1 m long. The erect flowering stems remain on the plants for many years.

Distribution

''Pringlea antiscorbutica'' grows on the remote

Heard Island and McDonald Islands The Territory of Heard Island and McDonald Islands (HIMI) is an Australian States and territories of Australia, external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to An ...

, Crozet, Prince Edward and

. The ancestor of ''P. antiscorbutica'' probably migrated from South America some five million years ago.

Ecology

The home islands of ''Pringlea antiscorbutica'' are at roughly 50° south latitude and constantly buffeted by strong winds, making the islands unfavorable for wind pollination, except on infrequent mild days. This climate, plus the absence of potential insect pollinators, means the species can only survive through a process of

self-pollination Self-pollination is a form of pollination in which pollen arrives at the stigma of a flower (in flowering plants) or at the ovule (in gymnosperms) of the same plant. The term cross-pollination is used for the opposite case, where pollen from ...

. The plants grow to a diameter of about 50 cm in around four years, and flower for the first time in their third or fourth year. At the mature stage, this species exhibits several adaptations linked to cold tolerance such as high

polyamine A polyamine is an organic compound having two or more amino groups. Alkyl polyamines occur naturally, but some are synthetic. Alkylpolyamines are colorless, hygroscopic, and water soluble. Near neutral pH, they exist as the ammonium derivatives. ...

levels. ''Pringlea'' has a very high leaf water content (above 83%) and the waterflow from the root to the leaves is very easy, which is no problem since soil water content on the distribution area of Kerguelen cabbage is permanently high. This implies that successfully growing this species elsewhere is difficult.

Uses

''Pringlea antiscorbutica'' is edible, containing high levels of

potassium Potassium is a chemical element; it has Symbol (chemistry), symbol K (from Neo-Latin ) and atomic number19. It is a silvery white metal that is soft enough to easily cut with a knife. Potassium metal reacts rapidly with atmospheric oxygen to ...

. Its leaves contain a vitamin C-rich oil, a fact which, in the days of sailing ships, made it very attractive to sailors suffering from

scurvy Scurvy is a deficiency disease (state of malnutrition) resulting from a lack of vitamin C (ascorbic acid). Early symptoms of deficiency include weakness, fatigue, and sore arms and legs. Without treatment, anemia, decreased red blood cells, gum d ...

, hence the specific epithet ''antiscorbutica'', which means "against scurvy" in

Low Latin Late Latin is the scholarly name for the form of Literary Latin of late antiquity.Roberts (1996), p. 537. English dictionary definitions of Late Latin date this period from the 3rd to 6th centuries CE, and continuing into the 7th century in ...

. It was essential to the diets of the whalers on

Kerguelen The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the sub-Antarctic region. They are among the most isolated places on Earth, with the closest t ...

when pork, beef, or

seal meat Seal meat is the flesh, including the blubber and organs, of Pinniped, seals used as food for humans or other animals. It is prepared in numerous ways, often being hung and dried before consumption. Historically, it has been eaten in many parts of ...

was used up. In May 1840, botanist

Joseph Dalton Hooker Sir Joseph Dalton Hooker (30 June 1817 – 10 December 1911) was a British botanist and explorer in the 19th century. He was a founder of geographical botany and Charles Darwin's closest friend. For 20 years he served as director of the Ro ...

was the first to make a technical analysis of the plant, and to assign the Latin name. Hooker also reported having eaten some soup that had been made with Kerguelen cabbage, and described the raw leaves as tasting like cress, the boiled leaves as tasting like "stale" cabbage, and the root as tasting like

horseradish Horseradish (''Armoracia rusticana'', syn. ''Cochlearia armoracia'') is a perennial plant of the family Brassicaceae (which also includes Mustard plant, mustard, wasabi, broccoli, cabbage, and radish). It is a root vegetable, cultivated and us ...

Conservation

The micropezid fly species ''

Calycopteryx mosleyi ''Calycopteryx'' is a genus of stilt-legged fly with only a single recognized species, the ''Calycopteryx mosleyi'' (sometimes misspelled ''moseleyi'') native to the Kerguelen Islands and Heard Island of the south Indian Ocean, first described b ...

'' is associated with this plant. Rabbits which were introduced on the Kerguelen around 1874, feed on the cabbage, and the plant is now limited to locations that cannot be accessed by them. Fortunately, rabbits are not present on all islands.

References

External links

* * {{Taxonbar, from=Q9062857, from2=Q1365567 Brassicaceae Monotypic Brassicaceae genera Leaf vegetables Flora of the Kerguelen Islands Flora of Heard Island and McDonald Islands Flora of the Prince Edward Islands Flora of the Crozet Islands