Kewa (plant)

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Kewa
MELLISS(1875) p315 - PLATE 27 - Pharnaceum acidum.jpg
Kewa acida
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Kewaceae
Christenh.
Genus: Kewa
Christenh.
Species

See text

Kewa Distribution.jpg
Distribution of Kewa species by country [1]

Kewa is a genus of flowering plants, consisting of eight species [2] of succulent sub-woody plants, native to eastern and southern Africa, including Saint Helena and Madagascar. These are small shrubs or herbs that form cushions and have edible, acid-tasting leaves. Kewa is the only genus in the family Kewaceae. [1]

Contents

The species were formerly included in the genus Hypertelis of the family Molluginaceae, but molecular studies have shown that most species did not belong there, but were rather distantly related to Molluginaceae, being placed in a clade comprising Aizoaceae, Gisekiaceae and Barbeuiaceae. Only the type species Hypertelis spergulacea remains in Molluginaceae, all others are transferred to the genus Kewa, which was named for Kew, where the Royal Botanic Gardens, Kew are situated. [1]

Species

Species transferred to Kewa from Hypertelis in 2014 were: [1]

Cultivation

Plants are perennial but relatively short lived. They can easily be propagated from seed and make attractive cushion-like shrubs with leathery leaves and many starry white flowers.

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Maarten J. M. Christenhusz Dutch botanist

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<i>Kewa acida</i> Species of flowering plant

Kewa acida is one of the eight species currently recognized in the genus Kewa, the sole genus in the family Kewaceae. It is a bushy grey-leaved annual or short-lived perennial plant, with white flowers, endemic to St Helena, where it has been called the "salad plant". It is regarded as Critically Endangered. The succulent leaves are high in Vitamin C and were used by sailors in the past as a scurvy preventative.

Hypertelis is a genus of flowering plants in the family Molluginaceae. Most of its former species have been transferred to the new genus Kewa, and the remaining species, Hypertelis spergulacea, may also need a different placement. Hypertelis spergulacea is a woody-based plant, up to 30 cm (1 ft) high, with whorled greyish green leaves. It is found on the border between Namibia and the Northern Cape province of South Africa.

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References

  1. 1 2 3 4 Christenhusz, M. J. M.; Brockington, S. F.; Christin, P.-A. & Sage, R. F. (2014). "On the disintegration of Molluginaceae: a new genus (Kewa, Kewaceae) segregated from Hypertelis, and placement of Macarthuria in Macarthuriaceae". Phytotaxa. Magnolia Press. 181 (4): 238–242. doi:10.11646/phytotaxa.181.4.4.
  2. Christenhusz, M. J. M.; Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. Magnolia Press. 261 (3): 201–217. doi: 10.11646/phytotaxa.261.3.1 .