Encephalartos lehmannii

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Karoo cycad
Encephalartos lehmannii, a, Pretoria NBT.jpg
CITES Appendix I (CITES) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Zamiaceae
Genus: Encephalartos
Species:
E. lehmannii
Binomial name
Encephalartos lehmannii
Lehmann

Encephalartos lehmannii is a low-growing palm-like cycad in the family Zamiaceae. It is commonly known as the Karoo cycad and is endemic to South Africa. [3] The species name lehmannii commemorates Prof J.G.C. Lehmann, a German botanist who studied the cycads and published a book on them in 1834. [3] This cycad is listed as near threatened in the IUCN Red List of Threatened Species. [1]

Contents

Description

Encephalartos lehmannii1.jpg
male cones of E. lehmannii growing in Longwood Gardens, Pa.
Encephalartos lehmannii 2zz.jpg
female cone of E. lehmannii in United States Botanic Garden

This cycad grows up to two metres tall with a trunk diameter of up to forty five centimetres and may be branched or unbranched. The leaves are up to one hundred and fifty centimetres long, blue or silver and strongly keeled. The leaflets are lanceolate, do not overlap each other and have smooth margins. The male cones are green or brown and up to thirty five centimetres long. The female cones are a similar colour and up to fifty centimetres long. The seeds are red and up to four and a half centimetres long. [4]

Distribution and habitat

The long petioles have distinctive yellow collars around their bases - these persist as papery leaf scars when the leaves are dropped. Each sessile leaflet likewise has a yellowish base. Encephalartoslehmannii2.jpg
The long petioles have distinctive yellow collars around their bases – these persist as papery leaf scars when the leaves are dropped. Each sessile leaflet likewise has a yellowish base.

This species is found in Eastern Cape Province, South Africa mainly on dry sandstone slopes and ridges where it grows amongst low succulent herbs and shrubs. [4] By flourishing in such an arid environment it demonstrates how the cycad race has endured through the ages, seemingly immune to drought when many other tree species such as the cabbage trees and taaibos are leafless and sometimes dead. [3]

Related Research Articles

<i>Encephalartos transvenosus</i> Species of cycad

Encephalartos transvenosus is a palm-like cycad in the family Zamiaceae, with a localized distribution in Limpopo, South Africa. Its common names, Modjadji's cycad or Modjadji's palm, allude to the female dynasty of the Lobedu people, the Rain Queens, whose hereditary name is Modjadji. The queen resides near a valley which is densely forested with these cycads, which they protected and hold sacred. The species name transvenosus refers to the fine network of veins between the main veins. These can be seen when the leaf is held up to the light.

<i>Encephalartos horridus</i> Species of cycad

Encephalartos horridus, the Eastern Cape blue cycad, is a small, low-growing cycad up to 0.9 m (3.0 ft) high and 0.9 m (3.0 ft) wide. It is a native of Eastern Cape Province, South Africa, and found in arid shrublands, most commonly on ridges and slopes with shallow soils. The species is particularly known for its distinctly blue-gray leaves, although the degree of coloration can vary significantly. The species name horridus is Latin for 'bristly', after the plant's stiff, spiny leaflets.

Encephalartos sclavoi, common name Sclavo's cycad, is a critically endangered cycad in the family Zamiaceae. It is endemic to Tanzania, with a population of only ~50 mature plants.

<i>Encephalartos villosus</i> Species of cycad

Encephalartos villosus is a South African cycad occurring from the East London vicinity, where it is found near the coast, to the northern border of Eswatini (Swaziland) where it may grow as far as 100 km inland. The species is common throughout its range and is the most frequently cultivated in Southern Africa, largely because of its affordable price. As a result of its large geographical distribution, it is notably variable in leaf and cone shape.

<i>Encephalartos ferox</i> Species of cycad

Encephalartos ferox, a member of the family Zamiaceae, is a small cycad with 35 cm wide subterranean trunk. It gets its name from the Latin word ferocious, likely from the spine-tipped lobes on the leaves of the plant. It is found naturally on the south-eastern coast of Africa where it has been used by local people for its starch content. It is considered to be one of the most popular cultivated cycads.

<i>Encephalartos altensteinii</i> Species of cycad

Encephalartos altensteinii is a palm-like cycad in the family Zamiaceae. It is endemic to South Africa. The species name altensteinii commemorates Altenstein, a 19th-century German chancellor and patron of science. It is commonly known as the breadtree, broodboom, Eastern Cape giant cycad or uJobane (Zulu). It is listed as vulnerable due to habitat destruction, use for traditional medicine and removal by collectors.

<i>Encephalartos longifolius</i> Species of cycad

Encephalartos longifolius is a low-growing palm-like cycad in the family Zamiaceae. It is endemic to South Africa and is commonly known as Thunberg's cycad, breadpalm or broodboom. This cycad is listed as near threatened in the IUCN Red List of Threatened Species.

<i>Encephalartos caffer</i> Species of cycad

Encephalartos caffer, the Eastern Cape dwarf cycad, is a rare cycad from the genus Encephalartos.

<i>Encephalartos lebomboensis</i> Species of cycad

Encephalartos lebomboensis is a species of cycad in the family Zamiaceae. Native to the Lebombo Mountains of South Africa, the species was first described in 1949 by the South African botanist Inez Verdoorn. It is commonly known as the Lebombo cycad, although the name is also used for Encephalartos senticosus which also occurs in the same locality.

<i>Encephalartos latifrons</i> Species of cycad

Encephalartos latifrons is a species of cycad that is native to Eastern Cape province in South Africa at elevations of 200 and 600 metres.

<i>Encephalartos natalensis</i> Species of cycad

Encephalartos natalensis, the Natal cycad or giant cycad, is a species of cycad that is endemic to the Qumbu and Tabankulu areas of the northern part of the Eastern Cape, and through most of KwaZulu-Natal. The number of mature individuals of this species is declining and the International Union for Conservation of Nature has assessed its conservation status as being "near threatened".

<i>Encephalartos friderici-guilielmi</i> Species of cycad

Encephalartos friderici-guilielmi is a species of cycad that is native to Eastern Cape province and KwaZulu-Natal province of South Africa at elevations of 700 up to 1400 meters.

<i>Encephalartos eugene-maraisii</i> Species of plant

Encephalartos eugene-maraisii is a species of cycad in the family Zamiaceae. It is endemic to South Africa, where it is limited to Limpopo. It is known as the Waterberg cycad.

<i>Encephalartos dolomiticus</i> Species of cycad

Encephalartos dolomiticus, the Wolkberg cycad, is a critically endangered species of cycad. It is only found in the Wolkberg at elevations of 1100–1500 meters. The area is near Penge in southeastern Limpopo Province, South Africa.

<i>Encephalartos concinnus</i> Species of cycad

Encephalartos concinnus is a species of cycad in the family Zamiaceae. It is endemic to Zimbabwe. It is known as the Runde cycad.

<i>Encephalartos inopinus</i> Species of cycad

Encephalartos inopinus is a species of cycad that is native to Limpopo Province, South Africa.

<i>Encephalartos cerinus</i> Species of cycad

Encephalartos cerinus or Waxen Cycad is a species of cycad in Africa.

Encephalartos dyerianus, known colloquially as the Lillie cycad, is a species of cycad that is native to hillsides in the lowveld of eastern Limpopo, South Africa.

<i>Encephalartos lanatus</i> Species of plant

Encephalartos lanatus is a species of cycad, a plant belonging to the family Zamiaceae growing in Mpumalanga, South Africa. Its specific epithet, lanatus, means wooly in Latin.

Encephalartos kanga, also known as Mnanasi Pori is a species of cycad in the family Zamiaceae. It is native to Tanzania. The plant was formally described as a new species in 2007 by Tamás Pócs and Quentin Luke.

References

  1. 1 2 Donaldson, J.S. (2010). "Encephalartos lehmannii". IUCN Red List of Threatened Species . 2010: e.T41934A10604117. doi: 10.2305/IUCN.UK.2010-3.RLTS.T41934A10604117.en . Retrieved 20 November 2021.
  2. "Appendices | CITES". cites.org. Retrieved 2024-01-17.
  3. 1 2 3 Palmer, E. and Pitman, N. Trees of Southern Africa. Cape Town (1972).
  4. 1 2 "Encephalartos lehmannii". plantnet.rbgsyd.nsw.gov.au. Archived from the original on 2014-06-23. Retrieved 2017-08-01.
  5. Becking, David. "Encephalartos lehmannii". treesa.org. Tree SA: The trees of southern Africa. Retrieved 22 June 2023.