| White-haired cycad | |
|---|---|
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Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Zamiaceae |
| Genus: | Encephalartos |
| Species: | E. friderici-guilielmi |
| Binomial name | |
| Encephalartos friderici-guilielmi Lehm. 1834 | |
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. [3]
The cycad has tree-shaped trunks that grow up to 4 meters tall and 35 to 60 centimeters wide. Its open crown is woolly brown. The leaves, which are 1 to 1.5 meters long and 18 to 20 centimeters wide, spread horizontally from the trunk. They are stiff, straight, or slightly curved, with young leaves being silvery and becoming yellowish with age. The petiole, which is 17 to 30 centimeters long, is bare and circular in cross-section. The leaflets are tightly arranged, with the upper ones overlapping and the middle ones measuring 10 to 17 centimeters long and 7 to 8 millimeters wide. At the base of the leaflets, 7 to 9 prominent veins are visible, and the leaf margin is not serrated, but the leaf tip has a sharp thorn.
The female cones are barrel-shaped, 25 to 30 centimeters long and 15 to 20 centimeters in diameter, often covered in yellow-gray to brown wool. They can be single or up to six in number. The sporophylls are 4.5 to 5 centimeters long, with a flat side and a nearly smooth surface under the wool. The sarcotesta of the seed is pale yellow to pale yellow-orange, while the sclerotesta is medium brown with distinct longitudinal furrows, 24 to 33 millimeters long and 16 to 20 millimeters in diameter.
The male cones are cylindrical, 20 to 40 centimeters long and 6 to 10 centimeters in diameter, covered in brown wool. They appear in groups of third to twelfth. The sporophylls are 25 to 28 millimeters long, with a side facing the stem that is 7 millimeters high and 17 to 20 millimeters wide, with a beak about 5 millimeters long. The sporangia form a single spot with a large sterile area at the base and the tip of the sporophyll. [4]
Encephalartos brevifoliolatus, the escarpment cycad, is a cycad in the African genus Encephalartos. It is extinct in the wild. The escarpment cycad was found in short grasslands in the very open Protea savanna on the northern Drakensberg escarpment in South Africa's Limpopo Province. These plants are used to growing on large cliffs.
Cycas thouarsii, the Madagascar cycad, is an evergreen arborescent cycad in the genus Cycas. It is named after the French botanist Louis-Marie Aubert du Petit-Thouars (1758—1831).
Encephalartos ghellinckii Lem. or Drakensberg cycad is endemic to South Africa, and is one of about 70 species found in sub-Saharan Africa. Strongly associated with the Natal Drakensberg, this 3m tall evergreen species is found from the foothills to fairly high altitudes, growing on stream banks, steep grassy slopes and sandstone outcrops. Its preferred habitat lying within grassveld, it has developed resistance to veldfires, and also the intense cold brought on by snow and frost.
Encephalartos senticosus is a species of cycad in the family Zamiaceae native to the Lebombo Mountains of Mozambique, Eswatini (Swaziland), and the KwaZulu-Natal province of South Africa. Prior to its description in 1996, Encephalartos senticosus had been confused with the closely related and sympatric Encephalartos lebomboensis. Both species are commonly known as the Lebombo cycad.
Encephalartos whitelockii is a species of cycad that is native to Uganda.
Encephalartos trispinosus is a species of cycad that is native to the Eastern Cape Province of South Africa.
Encephalartos princeps is a species of cycad that is native to Eastern Cape Province of South Africa.
Encephalartos paucidentatus is a 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.
Encephalartos gratus is a species of cycad that is native to Malawi and Mozambique.
Encephalartos laevifolius is a species of cycad that is found in the KwaZulu-Natal, Mpumalanga and Limpopo provinces of South Africa, and at Piggs Peak in Eswatini. The species is facing extinction in the wild, but is widely cultivated. As of 2012, the Encephalartos laevifolius has been listed as critically endangered by the IUCN.
Encephalartos hildebrandtii is a species of cycad in the Zamiaceae family. It is native to Kenya and Tanzania at elevations from sea level to 600 metres (2,000 ft). The species is named for the German explorer Johann Maria Hildebrandt.
Encephalartos poggei is a species of cycad in the family Zamiaceae. It is referred to by the common name Kananga cycad. It is native to Angola, the Democratic Republic of the Congo and Zaire.
Encephalartos septentrionalis, the Nile cycad, is a species of cycad in South Sudan, northern Uganda, northern Democratic Republic of the Congo, and the interior of the Central African Republic.
Encephalartos mackenziei is a species of cycad in South Sudan. It is found in the Didinga Hills of Namorunyang State.
Encephalartos cerinus or Waxen Cycad is a species of cycad in Africa.
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 msinganus is a species of cycad from Kwazulu-Natal.
Encephalartos nubimontanus is a species of cycad which is native to Limpopo, South Africa.
Encephalartos tegulaneus, the Kenyan giant cycad, is a species of cycad endemic to Kenya. It occurs in Eastern Province near Embu, Kenya, and on the Matthews Range in Rift Valley Province.
Media related to Encephalartos friderici-guilielmi at Wikimedia Commons
Data related to Encephalartos friderici-guilielmi at Wikispecies  | This cycad article is a stub. You can help Wikipedia by expanding it. |
