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Cycads in South Africa. Cycads / ˈ s aɪ k æ d z / are seed plants that typically have a stout and woody trunk with a crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters ...
Most parts of the Macrozamia miquelii are toxic with the seeds of the cycad having a higher concentration of azoxyglycosides, including cycasin and macrozamin, than other parts of the plant. [20] Other toxins identified within the cycad include β-Methylamino-L-alanine (BMAA) which acts as a powerful neurotoxin if ingested.
Dioon tomasellii is a species of cycad in the family Zamiaceae. It is endemic to Mexico, where it occurs in the states of Durango, Guerrero, Jalisco, Michoacán, and Nayarit. [1] This plant grows in oak and pine-oak forest and woodland habitat.
Cycads all over the world are in decline, with four species on the brink of extinction and seven species have fewer than 100 plants left in the wild. [ 2 ] 23,420 species of vascular plant have been recorded in South Africa, making it the sixth most species-rich country in the world and the most species-rich country on the African continent.
Encephalartos hirsutus is a species of cycad that is native to Limpopo Province of South Africa. [3] It was recorded from three separate localities on south-east-facing quartzite cliffs in the Makuya Nature Reserve bordering the Kruger National Park at elevations ranging from 800–1,000 meters (2,600–3,300 ft) above sea level.
Encephalartos ituriensis (common name Ituri Forest cycad) is a palm-like cycad of the family Zamiaceae. It is native to the grassland on two large granite monadnocks of the Ituri forest area in the Democratic Republic of the Congo .
They have broad, rhombic-shaped microsporophylls. The female cones are ovoid, green, and larger, measuring 15–35 cm long and 8–15 cm in diameter. Their macrosporophylls have a warty surface. The seeds are oblong, 20–30 mm long, 18–23 mm wide, and covered by a red sarcotesta. [4]
The Cycad Pages. Royal Botanic Gardens Sydney. Archived from the original on 2021-03-01. "Bowenia". Cycad Jungle. Archived from the original on 2014-07-14. Gymnosperm Database, Bowenia "Cycad, Zamia Fern Bowenia spectabilis". PlantFiles. Dave's Garden. "Bowenia serrulata". CITES Convention on International Trade of Endangered Species of Wild ...