Kerguelen cabbage | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Brassicales |
Family: | Brassicaceae |
Genus: | Pringlea T.Anderson ex Hook.f. |
Species: | P. antiscorbutica |
Binomial name | |
Pringlea antiscorbutica | |
Pringlea antiscorbutica, commonly known as Kerguelen cabbage, is a flowering plant and the sole member of the monotypic genus Pringlea in the family Brassicaceae. Its common name comes from the archipelago of its discovery, the Kerguelen Islands, and its generic name derives from Sir John Pringle, president of the Royal Society at the time of its discovery by Captain James Cook's Surgeon, William Anderson in 1776.
Despite its appearance and edibility, it is not related to the common broadleaf plantain.
Pringlea 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. [1]
The species grows on the remote Heard Island and McDonald Islands, Crozet, Prince Edward and Kerguelen Islands. [2] The ancestor of P. antiscorbutica probably migrated from South America some five million years ago. [3]
The home islands of Kerguelen cabbage 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 Kerguelen cabbage can only survive through a process of self-pollination. [2]
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. [4] At the mature stage, this species exhibits several adaptations linked to cold tolerance such as high polyamine levels. [5] [6] 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. [7] [8]
The plant is edible, containing high levels of potassium. 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, [8] hence the specific epithet antiscorbutica, which means "against scurvy" in Low Latin. It was essential to the diets of the whalers on Kerguelen when pork, beef, or seal meat was used up. In May 1840, botanist Joseph Dalton Hooker was the first to make a technical analysis of the plant, and to assign the Latin name. [9]
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. [10] [8]
The micropezid fly species Calycopteryx mosleyi 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. [1]
Brassicaceae or Cruciferae is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The leaves are simple, lack stipules, and appear alternately on stems or in rosettes. The inflorescences are terminal and lack bracts. The flowers have four free sepals, four free alternating petals, two shorter free stamens and four longer free stamens. The fruit has seeds in rows, divided by a thin wall.
The Territory of Heard Island and McDonald Islands is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica. The group's overall land area is 372 km2 (144 sq mi) and it has 101.9 km (63 mi) of coastline. Discovered in the mid-19th century, the islands lie on the Kerguelen Plateau in the Indian Ocean and have been an Australian territory since 1947.
Cabbage, comprising several cultivars of Brassica oleracea, is a leafy green, red (purple), or white biennial plant grown as an annual vegetable crop for its dense-leaved heads. It is descended from the wild cabbage, and belongs to the "cole crops" or brassicas, meaning it is closely related to broccoli and cauliflower ; Brussels sprouts ; and Savoy cabbage.
Erysimum, or wallflower, is a genus of flowering plants in the cabbage family, Brassicaceae. It includes more than 150 species, both popular garden plants and many wild forms. Erysimum is characterised by star-shaped and/or two-sided) trichomes growing from the stem, with yellow, red, pink or orange flowers and multiseeded seed pods.
Raphanus raphanistrum, also known as wild radish, white charlock or jointed charlock, is a flowering plant in the family Brassicaceae. The species is native to western Asia, Europe and parts of Northern Africa. It has been introduced into most parts of the world and is regarded as a habitat threatening invasive species in many areas, for example, Australia. It spreads rapidly and is often found growing on roadsides or in other places where the ground has been disturbed. The cultivated radish, widely used as a root vegetable, is sometimes considered to be one of its subspecies as Raphanus raphanistrum subsp. sativus.
Cruciferous vegetables are vegetables of the family Brassicaceae with many genera, species, and cultivars being raised for food production such as cauliflower, cabbage, kale, garden cress, bok choy, broccoli, Brussels sprouts, mustard plant and similar green leaf vegetables. The family takes its alternative name from the shape of their flowers, whose four petals resemble a cross.
The Micropezidae are a moderate-sized family of acalyptrate muscoid flies in the insect order Diptera, comprising about 500 species in about 50 genera and five subfamilies worldwide,. They are most diverse in tropical and subtropical habitats, especially in the Neotropical Region.
The diamondback moth, sometimes called the cabbage moth, is a moth species of the family Plutellidae and genus Plutella. The small, grayish-brown moth sometimes has a cream-colored band that forms a diamond along its back. The species may have originated in Europe, South Africa, or the Mediterranean region, but it has now spread worldwide.
The Kerguelen Islands are part of the Southern Indian Ocean Islands tundra ecoregion that includes several subantarctic islands. In this cold climate plant life is mainly limited to grasses, mosses and lichens, although the islands are also known for the indigenous edible Kerguelen cabbage. The islands are at the Antarctic Convergence, where cold water moving up from the Antarctic mixes with the warmer water of the Indian Ocean. As a consequence, marine mammals, especially seals, and seabirds and penguins are numerous.
Cochlearia officinalis, common scurvygrass, scurvy-grass, or spoonwort, is a species of flowering plant in the family Brassicaceae. The plant acquired its common name from the observation that it cured scurvy, and it was taken on board ships in dried bundles or distilled extracts. Its very bitter taste was usually disguised with herbs and spices; however, this did not prevent scurvygrass drinks and sandwiches becoming a popular fad in the UK until the middle of the nineteenth century, when citrus fruits became more readily available.
The Antarctic floristic kingdom, also the Holantarctic kingdom, is a floristic kingdom that includes most areas of the world south of 40°S latitude. It was first identified by botanist Ronald Good, and later by Armen Takhtajan. The Antarctic Floristic Kingdom is a classification in phytogeography, different from the Antarctic realm classification in biogeography, and from Antarctic flora genera/species classifications in botany.
The Southern Indian Ocean Islands tundra is a tundra ecoregion that includes several subantarctic islands in the southern Indian Ocean.
Lepidium oleraceum is a herb in the family Brassicaceae, endemic to New Zealand. Its English common name is Cook's scurvy grass; Māori names include nau, ngau, naunau and heketara.
Azorella polaris, commonly known as the Macquarie Island cabbage, is a species of flowering plant usually placed in the family Araliaceae or Apiaceae and only very distantly related to cabbage. It is a megaherb, growing up to about a metre in height, native to the subantarctic islands of New Zealand and to Australia’s Macquarie Island.
Cardamine corymbosa, commonly known as the New Zealand bitter-cress, is a flowering plant in the family Brassicaceae. Native to the subantarctic islands of Australasia, it has become an invasive species in plant nurseries. The specific epithet refers to the structure of the inflorescence.
Lyallia kerguelensis, commonly called the lyallia cushion, is a species of flowering cushion plant in the monotypic genus Lyallia of the family Montiaceae. It is sometimes placed in the Hectorellaceae or the Portulacaceae. The generic name honours British botanist and naval officer David Lyall who served as assistant surgeon on HMS Terror on the Antarctic exploring expedition led by James Clark Ross from 1839 to 1843. Lyall was a friend and colleague of describer Joseph Dalton Hooker on the expedition when the type material was collected. The specific epithet refers to the type locality.
Galium antarcticum, commonly known as Antarctic bedstraw or subantarctic bedstraw, is a species of flowering plant in the coffee family. It has a largely subantarctic range.
The Botany of Fuegia, the Falklands, Kerguelen's Land, Etc. is a description of the plants discovered in these islands during the Ross expedition written by Joseph Dalton Hooker and published by Reeve Brothers in London between 1845 and 1847. Hooker sailed on HMS Erebus as assistant surgeon. It was the second in a series of four Floras in the Flora Antarctica, the others being the Flora of Lord Auckland and Campbell's Islands (1843-1845), the Flora Novae-Zelandiae (1851–1853), and the Flora Tasmaniae (1853–1859). They were "splendidly" illustrated by Walter Hood Fitch.
Megaherbs are a group of herbaceous wildflowers growing in the New Zealand subantarctic islands and on the other subantarctic islands. They are characterised by their great size, with huge leaves and very large and often unusually coloured flowers, which have evolved as an adaptation to the harsh weather conditions on the islands. They suffer from overgrazing due to introduced mammals.
Calycopteryx is a genus of stilt-legged fly with only a single recognized species, the Calycopteryx mosleyi native to the Kerguelen Islands and Heard Island of the south Indian Ocean, first described by Alfred Edwin Eaton in 1875. It is characterized by its tiny size and flightlessness.